Brain structures
A glossary of structures in the brain referred to on this site, together with the news reports in which they appear. Links to other resources on the Web.
A glossary of neurological terms is also available.
A
amygdala:
means "almond", so-named because of its shape and size. The amygdala
is part of the basal ganglia, and is situated
in the temporal lobe. It has many
connections with other parts of the brain, most particularly with
the limbic system, for which reason it is considered part of the
limbic system (although not part of the limbic
lobe itself). The amygdala is critically involved in computing
the emotional significance of events, and recent research indicates
it is responsible for the influence of emotion on perception,
through its connections with those brain regions that process
sensory experiences, thus "allowing perception of emotionally
significant events to occur despite inattention.” Rat studies also
suggest that the amygdala, in tandem with the
orbitofrontal cortex, is involved in the forming of new
associations between cues and outcomes - in other words, it is the
work of the amygdala to teach us what happens to us when we do
something.
Some brain injuries may reduce the likelihood of PTSD
; Anticipation
strengthens memory
; How emotions
interfere with memory
; A single memory
is processed in three separate parts of the brain ;
Origins of fear more
complex than supposed ;
How trauma triggers
long-lasting memories in the brain ;
Why traumatic
memories have the power they do
; Different brain
regions for arousing and non-arousing words
; Key brain link
in associative learning directly observed
; Amygdala may
be critical for allowing perception of emotionally significant
events despite inattention ;
Fear-conditioning study demonstrates long-suspected link between
longterm potentiation and learning
angular
gyrus: a gyrus located in the
inferior parietal lobule, at the crossroads of areas specialized
for processing touch, hearing and vision. Larger in hominids than
other primates, it has been implicated in our understanding of
metaphor.
Brain region for understanding metaphors located
anterior
cingulate:
also known as area 24 of Brodmann-1905. The anterior cingulate is a
defined area of the cerebral cortex including
parts of both the cingulate gyrus and the
frontal lobe.
Neurons targeted by
dementing illness may have evolved for complex social cognition
; Master planners in
brain may coordinate other areas' roles in cognitive tasks ;
AIDS-related cognitive
impairment exists in two separate forms ;
A single memory is
processed in three separate parts of the brain ;
Coffee jump-starts
short-term memory ;
Insight into the
processes of 'positive' and 'negative' learners
; How false memories
are formed
;
Development of working
memory with age
; Can't place a name to
the face you just saw?
; How we retrieve
distant memories
anterior medial prefrontal and posterior
cingulate: gyri
(folds) in the limbic lobe; implicated in
self-reflective thought (thinking about yourself and your
attributes).
New brain region
associated with face recognition
; Identity memory area
localized
anterior
temporal cortex: part of the temporal
cortex; believed to store facts about people and thought to be
an essential part of the identifying process.
How the brain recognizes a face
B
basal
ganglia: are large "knots" (ganglion means knot) of nerve
cells deep in the cerebrum. They are thought
to be involved in various aspects of motor behavior (Parkinson's
disease, for example, is an affliction of the basal ganglia).
Structures contained in the basal ganglia include the
amygdala, globus pallidus, and striatum (containing the
caudate nucleus and the putamen).
Brain scans
reveal 'chemobrain' no figment of the imagination
; Primitive
brain learns faster than the "thinking" part of our brain
; Imaging reveals brain
abnormalities in ADHD children
brain stem:
is the most primitive part of the brain, which also means it
controls the most basic functions (such as breathing. It may be
thought of as the stem connecting the spinal cord and the cerebral
hemispheres. It includes the thalamus,
hypothalamus,
midbrain, medulla, and pons.
Early music training
'tunes' auditory system
Broca's region:
is located in the frontal lobe, and, for
most people, the left hemisphere (some left-handers have this area
in the right hemisphere). Originally thought to be "the" speech
center, it is now understood that a number of regions of the brain
are involved in language behavior. More recently, Broca's area has
been implicated in music processing, leading some researchers to
suggest music may be processed as a language. Imaging studies have
revealed that professional musicians trained at an early age have an
increased volume of gray matter in Broca's area. Broca's area is
part of a language and music processing network that includes
Wernicke's area, the superior temporal
sulcus, Heschl's gyrus, planum polare,
planum temporale, and the anterior superior insular cortices.
see Music and language
; also New
light on speech evolution in humans
;
How
bilingualism affects the brain
; Language
center executive organizer of action plans ;
Third language area
in brain identified
; Imaging reveals a
biological basis for autism
; Reading verbs
activates motor cortex areas
; Second language
best taught in childhood ;
Another link between music and language
; More grey matter
in the auditory cortex of musicians' brains ;
Another interesting facet to expert memory: how professional
musicians process music ;
Memory different depending on whether information received via eyes
or ears ;
Significant
brain differences between professional musicians trained at an early
age and non-musicians
C
caudate nucleus:
is located in the
basal ganglia; with the
putamen, it forms that part of the basal ganglia known as the
striatum
AIDS-related cognitive
impairment exists in two separate forms ;
Why autism is
associated with executive function problems
cerebellum:
is the main structure in the
hindbrain, situated at the base of the
brain, at the top of the spinal cord. The cerebellum controls our
balance and postural stability, and is involved in motor
coordination - not, it appears, in the initial learning of motor
skills, but in the performance and improvement of learned motor
skills. Some regions of the cerebellum are especially vulnerable to
the effects of chronic alcoholism. The hindbrain, although far from
the frontal lobes, is connected to those
regions, most especially through the pons and
the
thalamus. Recent rat studies have also
suggested that the cerebellum may be involved in some way in
remembering strong emotions, in particular, in the consolidation of
long-term memories of fear. There is also growing evidence that the
cerebellum might also be involved in processing speech and language.
Brain scans
reveal 'chemobrain' no figment of the imagination
; Human cerebellum and
cortex age in very different ways ;
How sleep improves memory
; Imaging reveals
brain abnormalities in ADHD children ;
Mentally, sleep may be as active a state as waking state
; Growing
evidence cerebellum involved in language ;
Study of alcoholics reveals connection between cerebellum and
prefrontal cortex ;
Motor skill training may help children with fetal alcohol exposure
; New research into
motor skills distinguishes between learning and performance ;
Cerebellum implicated in remembering emotions
cerebral
cortex: the gray matter outer layer of
the cerebrum. The newest part of the brain
in evolutionary terms; responsible for primary sensory functions,
motor coordination and control, and most particularly, the
"higher-order" functions of language and thinking.
More on how
memories are consolidated during sleep
; Brain enlargement
may be characteristic of autism ;
Human cerebellum and
cortex age in very different ways ;
Gene may be key to evolution of larger human brain
cerebrum: the largest structure of the brain; containing the cerebral cortex (the outer layer), which is made of gray matter, and an inner core composed of white matter (myelinated nerve fibers and gray basal ganglia); divided into a number of regions known as lobes.
claustrum:
a thin cell mass separating the putamen from
the
insula cortex; part of the
basal ganglia.
Brain still
developing at age 18
cornu ammonis: a
substructure of the hippocampus, highly
active during encoding (learning) of face-name pairs. (also see
dentate gyrus and subiculum)
More details about how memories are formed in the hippocampus
corpus callosum:
the main "bridge" between the left and right cerebral hemispheres; a
broad bundle of myelinated fibers (white matter) carrying
information from regions in one lobe to
similarly placed regions in the opposing lobe. There are some 300
million fibers in the average corpus callosum. Cutting the corpus
callosum prevents communication between the hemispheres (creating
the well-known "split-brain" cases), and is used in severe cases of
epilepsy.
Fitness counteracts
cognitive decline from hormone-replacement therapy ;
More light on
a common developmental disorder
; Recognizing yourself
is different from recognizing other people
D
dentate gyrus:
a substructure of the hippocampus, highly
active during encoding (learning) of face-name pairs. (also see
cornu ammonis and subiculum)
Natural compound
and exercise boost memory in mice
; Wnt signaling
vital for adult neurogenesis ;
Social status
influences brain structure ;
More details about how memories are formed in the hippocampus
dorsolateral
prefrontal cortex: part of the
prefrontal cortex, associated with tasks that require
concentration, such as reading
For cognitive
benefits of estrogen, timing is everything
;
How
bilingualism affects the brain
; Simple Lifestyle
Changes May Improve Cognitive Function ;
Lifestyle changes
improve seniors’ memory surprisingly quickly ;Why
older adults more vulnerable to distraction from irrelevant
information ;
How emotions
interfere with memory
E
extrastriate
region: connected to the caudate nucleus
and the putamen; parts may serve a
visuospatial function, while other parts have been implicated in
visual object-related processes.
Brain Imaging
Identifies Best Memorization Strategies
F
forebrain:
the brain develops, in utero, in three separate portions, reflecting
evolutionary history: the hindbrain, the
midbrain, and the forebrain. The forebrain
develops into the cerebral cortex, the
basal ganglia, the limbic system, the
thalamus
and hypothalamus.
Now definite? Memories are consolidated during sleep
frontal lobe:
the frontal lobes (left and right) are situated at the "front" of
the cortex, i.e. behind the forehead. They are the largest of the
lobes in the
cerebrum, and may be thought of as the
"highest" part of our brain. The frontal lobes are critical for
those faculties that humans regard as special to our species -
reasoning, planning, attention, some aspects of language. Women have
up to 15% more brain cell density in the frontal lobe, but with age,
appear to shed cells more rapidly from this area than men. By old
age, the density is similar for both sexes. The effect of this on
performance is unknown. see also fronto-parietal
network
Why music training helps language;
Brain network associated with cognitive reserve identified
; Neural bottleneck
found that thwarts multi-tasking ;
Brain scans
reveal 'chemobrain' no figment of the imagination
; Chemo drugs for
treating breast cancer may cause changes in cognitive function ;
Childhood sleep apnea
linked to brain damage, lower IQ ;
Coffee jump-starts
short-term memory ;
Changes in brain, not
age, determine one's ability to focus on task ;
How higher
education protects older adults from cognitive decline ;
Imaging reveals brain
abnormalities in ADHD children;
Cigarette smoking
exacerbates alcohol-induced brain damage
; What happens in the
brain when we remember our own past?
;
Maturation of the human brain mapped ;
Imaging confirms role of frontal lobes in planning
; How emotions
interfere with staying focused
; Identity memory area
localised;
Role of
prefrontal cortical regions in goal-directed behaviour
; Gender
differences in frontal lobe neuron density
fronto-parietal
network: a growing body of evidence points to a network of
connected regions in the adjacent frontal and
parietal lobes, that have been implicated in
higher-order processing such as attention, decision-making, and
intelligence.
Brain activity distinguishes false from true recollection
; Brain network related to intelligence identified;
IQ-related brain areas
may differ in men and women
; Development of working
memory with age
;
Intelligence based on the volume of gray matter in certain brain
regions
;
Exercise improves attention and decision-making among seniors
fronto-polar
region: is a substructure of the frontal
lobes
consisting of several gyri of similar
morphology.
How sleep improves memory
fusiform gyrus:
a
gyrus in the temporal lobe.
Part of a network of brain regions with the
amygdala as well as the medial prefrontal
cortex, the occipitofrontal cortex, and the
superior temporal sulcus, which are involved in the processing
of socially salient stimuli (important for social behavior). The
fusiform gyrus is particularly implicated in face recognition. The
right fusiform gyrus has been implicated in the processing of
positive emotional contexts.
No specialized face
area
; Brain networks
change according to cognitive task
; How the brain is
wired for faces ;
How the brain recognizes a face ;
Special training may help people with autism recognize faces ;
Babies' experience with faces leads to narrowing of perception ;
Differences in face perception processing between autistic and
normal adults
; Different
brain regions implicated in the representation of the structure and
meaning of pictured objects ;
Why recognizing a face is easier when the race matches our own
G
Geschwind's
territory: a newly discovered brain region, implicated in
language. This area connects
Broca's and Wernicke's areas via a
region of the
parietal lobe of the cortex, and may be
important for the acquisition of language in childhood. The area is
apparently the last area in the brain to mature, the completion of
its maturation coinciding with the development of reading and
writing skills.
Third language area in brain identified
gyrus: a fold or convolution in the cerebrum (compare sulcus)
H
Heschl's gyrus:
the primary auditory cortex, located in the
superior temporal gyrus, in the temporal
lobe. Part of a language and music processing network that
includes Broca's area,
Wernicke's area, the superior temporal
sulcus, planum polare,
planum temporale, and the anterior superior insular cortices.
Fast language
learners have more white matter in auditory region ;
Concrete evidence of
the 'memory code' ;
Where tunes get stuck
in your head ; Music and
language
hindbrain:the
brain develops, in utero, in three separate portions, reflecting
evolutionary history: the hindbrain, the
midbrain, and the
forebrain. The hindbrain (the oldest part
of the brain) develops into the cerebellum,
the pons, and the medulla.
Study of alcoholics reveals connection between cerebellum and
prefrontal cortex
hippocampus:
means "sea horse", and is named for its shape. It is one of the
oldest parts of the brain, and is buried deep inside, within the
limbic lobe. The hippocampus is important for the forming, and
perhaps long-term storage, of associative and episodic memories.
Specifically, the hippocampus has been implicated in (among other
things) the encoding of face-name associations, the retrieval of
face-name associations, the encoding of events, the recall of
personal memories in response to smells. It may also be involved in
the processes by which memories are consolidated during sleep.
Adult neurogenesis confirmed in primates
; Mouse study points to new therapy for Fragile X sufferers
; New research shows why
too much memory may be a bad thing ;
Odor can help memory,
in some circumstances ;
Sleep deprivation
affects neurogenesis
; How we predict the
future
; Why
neurogenesis is so much less in older brains
; Still more on how
memories are consolidated during sleep
; More on how
memories are consolidated during sleep
;
Rote learning may
improve verbal memory in seniors
;
Heavy, chronic
drinking can cause significant hippocampal tissue loss ;
Why moderate drinking may boost memory
; Chemo drugs for
treating breast cancer may cause changes in cognitive function ;
'Memory gene'
identified
; Repeated
common infections may lead to memory deficits over a lifetime ;
Anticipation strengthens memory
; Childhood sleep
apnea linked to brain damage, lower IQ ;
How
multitasking impedes learning
; Fat hormone linked to
learning and memory ;
New view of
hippocampus’s role in memory ;
Neurogenesis not the sole cause of enriched environment effects
; A single memory
is processed in three separate parts of the brain ;
Losing sleep inhibits
neurogenesis ;
Estrogen levels
affect hippocampal wiring ;
More light on
adult neurogenesis; implications for dementia and brain injuries
; Wnt signaling
vital for adult neurogenesis ;
Early life stress can
lead to memory loss and cognitive decline in middle age ;
Origins of fear more
complex than supposed ;
How trauma triggers
long-lasting memories in the brain ;
Single cell
recognition research finds specific neurons for concepts
; How sleep
improves memory
;
Mice brains shrink during winter, impairing spatial memory ;
How estrogen affects the brain
; Stress bad for the
brain
; "Neural cliques"
create memories
; Chemical in clear
plastics can impair learning ;
Why traumatic memories have the power they do
; Alcohol's damaging
effects on adolescent brain function
; How the brain
creates false memories
; New brain cells
develop during alcohol abstinence ;
More evidence that learning is consolidated during sleep
;
How false memories are
formed
;
Brain circuit
crucial for memory consolidation identified ;
Testosterone deprivation makes men forget
;
New technique sheds light on autobiographical memory
; Why cardiac arrest
may hinder ability to learn certain tasks
; The role of
consolidation in sleep;
Social status influences brain structure ;
Saving the most vulnerable brain cells in stroke ;
Confirmation that a memory code is held in many different regions
; Role of
hippocampus in long term memory ;
Hippocampus and subiculum both critical for short-term memory ;
Different brain regions for arousing and non-arousing words
; More light shed
on memory encoding ;
Now definite? Memories are consolidated during sleep
; Exercise may
counteract bad effect of high-fat diet on memory ;
Forgetting may sometimes be an active process ;
More evidence for active forgetting ;
Gene essential for development of normal brain connections
discovered
;Brain protein
affecting learning and memorydiscovered
; More learned
about how spatial navigation works in humans ;
Another step in understanding how memories are formed
; Brain implant
may restore memory;Another
step in understanding how sleep affects memory ;More
details about how memories are formed in the hippocampus
;Gene linked to poor
episodic memory ;
Brain region involved in recalling memories from smell identified;
December news report
2
I
inferior
frontal gyrus: a gyrus in the
frontal lobe that is active in many different language tasks and
plays a role in integrating brain regions. see also
left inferior frontal gyrus
Neural substrate of congenital amusia
; Having right timing 'connections' in brain is key to overcoming dyslexia;
Brain networks
change according to cognitive task
inferior
occipital gyrus: a gyrus
in the occipital lobe that appears to be
particularly sensitive to slight physical changes in faces.
How the brain recognizes a face
inferior parietal
lobule:part of the parietal lobe;
also known as the inferior parietal gyrus. A fold in the lower area
of the parietal lobe. The area is sensitive to phonological demands
and appears to be involved in reading. (also see
left inferior parietal cortex)
Language affects how
math is done?; How
false memories are formed
;
Training improves working memory capacity ;
Estrogen improves verbal memory in postmenopausal women
inferior
temporal gyrus: a fold in the lower area of the
temporal lobe. The area is involved in object recognition.
Special training may help people with autism recognize faces
insular
cortex: part of the paralimbic zone,
it is critical for perception and modulation of sensory and
autonomic data, including pain and visceral sensations. It's also
involved in speech.
Sleep deprivation
can threaten competent decision-making
; Neurons targeted by
dementing illness may have evolved for complex social cognition
; How sleep improves
memory
intraparietal
sulcus: a sulcus in the
inferior parietal lobule that is implicated in language
processing, in particular spelling.Also recently implicated in skill
learning.
Watching with intent
to repeat ignites key learning area of brain ;
Brain networks
change according to cognitive task
L
lateral
temporal cortex: a part of the temporal lobe that is
implicated in language processing, in particular rhyme.
Brain networks change according to cognitive task
lateral ventricle:
part of a series of interconnected cavities containing cerebrospinal
fluid in the core of the brain
Wnt signaling
vital for adult neurogenesis
left caudate:
the left hemisphere
caudate has been implicated in the control of
language switching in the brains of bilingual people.
How does the
bilingual brain distinguish between languages?
left inferior
frontal gyrus: the part of the inferior
frontal cortex in the left hemisphere; implicated in preventing
memory interference
Having right timing 'connections' in brain is key to overcoming dyslexia;
More insight into why
we forget
left inferior parietal cortex: the
part of the inferior parietal cortex
in the left hemisphere; active during both procedural and
declarative learning; active during encoding of unfamiliar faces.
(see left prefrontal cortex and
right putamen)
Learning languages
increases gray matter density ;
Learning a sequence with explicit knowledge of that sequence
involves same
; Differential
effects of encoding strategy on brain activity patterns
left prefrontal cortex: part of the
prefrontal cortex; active during both procedural and declarative
learning; active during encoding of unfamiliar faces. (see
left inferior parietal cortex and right
putamen)
Learning a sequence with explicit knowledge of that sequence
involves same
; Differential
effects of encoding strategy on brain activity patterns
limbic lobe: a
lobe
that lies deep within the cerebrum - a broad
collar of cortex fringing the corpus callosum
(limbic means "border"). The limbic lobe includes the
hippocampus,
cingulate gyrus, dentate
gyrus, and the parahippocampal gyrus.
Alcohol's damaging effects on adolescent brain function
lobes: the cerebrum is highly convoluted - it is this deep and numerous folding that vastly increases the cortical area of the human brain. The deepest fissures provide somewhat arbitrary boundaries for the mapping of the brain. Following these guidelines, the cerebrum is divided into five lobes: the frontal, temporal, parietal, occipital and limbic lobes.
M
medial
prefrontal cortex: part of the
prefrontal cortex close to the midline,
implicated in social memory.
Social memory
localized
; How the brain
handles sarcasm;
Can't place a name to
the face you just saw?
mediotemporal lobe (MTL):
includes the hippocampus, the
amygdala, and the entorhinal and
perirhinal cortices. Although given this name, the idea that
this is an integrated memory system with a common function has
recently been questioned. It is observed that the various components
evolved at different points. Nevertheless, we may say that the MTL
appears to be involved in declarative learning (facts and events),
being particularly important during initial learning. There is some
evidence that long-term consolidation of memories is guided by the
MTL, in particular by the entorhinal cortex (which is damaged in the
early stages of Alzheimer’s disease). Moreover, a recent study
showed that progressive atrophy in the medial temporal lobe was the
most significant predictor of cognitive decline in seniors.
Maturity brings richer memories
; Rating
familiarity: how we do it ;
Single cell
recognition research finds specific neurons for concepts
;
Long-term storage of autobiographical memories
; Development of
working memory with age
;
New technique sheds light on autobiographical memory
; The role of
consolidation in sleep;
Questioning the medial temporal lobe
; Magnetic
resonance imaging may help predict future memory decline ;
Activity in the mediotemporal lobe lower in elderly with poor memory;
Competition between memory systems ;
Imaging study confirms role of medial temporal lobe in memory
consolidation
mesolimbic region:
links the ventral tegmentum in the midbrain to the nucleus
accumbens. It is one of the four major pathways for the
neurotransmitter dopamine, and is involved in pleasure, reward,
and motivation.
Why motivation
helps memory
midbrain:
the brain develops, in utero, in three separate portions, reflecting
evolutionary history: the
hindbrain, the midbrain, and the
forebrain. The midbrain includes the tectum
and the tegmentum, which lie on either side of the cerebral
aqueduct, a reservoir in the midbrain for
cerebrospinal fluid.
The midbrain is involved in automatic reflexes associated with the
visual and auditory systems, and more recently has been implicated
in assessing reward values.
Novelty aids
learning
middle
frontal gyrus: a gyrus in the middle
part of the frontal lobe.
Having right timing 'connections' in brain is key to overcoming dyslexia;
Exercise improves attention and decision-making among seniors
; Training improves
working memory capacity
N
neocortex:
the "new" part of the cortex - the most recent and complex
part of the brain. The frontal,
temporal,
parietal and occipital
lobes are all part of the neocortex.
Long-term storage of autobiographical memories
;
Brain circuit crucial for memory consolidation identified
;
More support for social skill theory of brain evolution
nucleus accumbens:
located between the caudate and the putamen; an critically involved
in the 'reward circuit'.
Sleep deprivation
can threaten competent decision-making
O
occipital lobe:
one of the
lobes of the cerebrum,
situated at the back of the skull, and above the
hindbrain. It borders with the parietal lobe
(from which it is not clearly demarcated) and the
temporal lobe. The occipital lobe contains the primary visual
cortex, where visual information is processed.
Specific brain
region for reading
operculum:
is located in the
inferior frontal gyrus, and partly overlaps
with Broca's area. It's recently been
implicated as one of the structures in the brain that coordinates
the activities of other brain regions.
Master planners in
brain may coordinate other areas' roles in cognitive tasks
orbitofrontal
cortex: a part of the frontal
lobe. Traditionally thought to be involved in "personality
traits", such as social adjustment and the control of
mood, drive and responsibility, and more recently implicated in drug
addiction. Recent rat studies have found evidence that changing
nerve cell firing patterns in the orbitofrontal cortex are involved
in the learned of associations, through a connection with the
amygdala.
Gene predicts better outcome as cortex normalizes in teens with ADHD
; Key brain link in associative learning directly observed
P
parahippocampal
region: is located in the limbic lobe.
Recent research has found neurons here that are responsive to
landmarks.
Fitness counteracts
cognitive decline from hormone-replacement therapy ;
The role of
consolidation in sleep;
More learned about how spatial navigation works in humans
paralimbic zone: an "uninterrupted girdle surrounding the medial and basal aspects of the cerebral hemispheres" containing the insula cortex, the temporal pole, the cingulate cortex, the parahippocampal cortices, and the orbitofrontal cortex.
parietal lobe:
one of the
lobes of the cerebrum,
situated at the top, behind the frontal lobe.
The primary sensory area is located in the parietal lobe - this is
where nerve impulses carrying sensations of pain, temperature,
touch, and pressure come. Areas in the parietal lobe are also
involved in spatial orientation, speech and language development,
and attention. see also fronto-parietal network
Disentangling
attention
; Fast language
learners have more white matter in auditory region ;
How sleep improves
memory
; Maturation of the
human brain mapped
perirhinal
cortex: part of the medial temporal lobe
How the brain creates false memories
piriform
cortex: piriform / pyriform means pear-shaped. It is a
composite substructure that includes the lateral olfactory stria,
one of three divisions of the olfactory tract. The olfactory system
is the only sensory system that goes directly to the cerebral cortex
without first synapsing in the thalamus.
Confirmation that a memory code is held in many different regions
planum polare:
part of the superior temporal gyrus, in the
temporal lobe; part of the cortical network involved in language
and music processing.
Music and language
planum temporale:
part of the superior temporal gyrus, in the
temporal lobe. The planum temporal is part of the cortical
network involved in language and music processing, and is generally
larger in the left hemisphere than the right.
Music and language ;
Another interesting facet to expert memory: how professional
musicians process music
pons: short for
pons varolii; a "bridge" (pons is Latin for bridge) of nerve fibers
connecting the cerebellum and the medulla oblongata with other
regions of the brain, most particularly with the
frontal lobe.
Study of alcoholics reveals connection between cerebellum and
prefrontal cortex
posterior parietal
cortex: the rear part of the parietal
lobe
(thus adjacent to the occipital lobe).Associated
in humans with a variety of complex behaviors such as the
appreciation of objects and their qualities, facial recognition and
social communication. Most recently implicated as the limiting
factor in the storage capacity of our visual working memory.
Gene predicts better outcome as cortex normalizes in teens with ADHD
; Why working memory
capacity is so limited ;
More complex brain may have pre-dated Homo genus
precuneus:
part of the medial section of the posterior
parietal cortex
How false memories are formed
prefrontal cortex:
is the area of the brain at the very front of the
frontal lobes. It is involved in "executive functions", such as
working memory, decision-making, planning and judgment. Prefrontal
regions appear to be particularly sensitive to the effects of aging.
It is thought that the reduced ability to recall the context of
memories that occurs with advancing age, is evidence that the
prefrontal cortex is also critical for context processing - a
process involved in many cognitive functions. A recent study has
also revealed that emotional stimuli and attentional functions are
integrated in a specific part of the prefrontal cortex - the
anterior cingulate (located between the right and left halves).
See also
medial prefrontal cortex
Maturity brings richer memories
; Brain's voluntary
chain-of-command ruled by not 1 but 2 captains
; Disentangling
attention
; Prefrontal
cortex loses neurons during adolescence ;
Common gene version
optimizes thinking but carries a risk ;
Neural bottleneck
found that thwarts multi-tasking ;
Brain Imaging
Identifies Best Memorization Strategies
; Planning is
goal-, not action-, oriented
; Fitness
counteracts cognitive decline from hormone-replacement therapy ;
Morning
grogginess worse for cognition than sleep deprivation ;
Origins of fear more
complex than supposed ;
How sleep improves
memory
; Primitive brain
learns faster than the "thinking" part of our brain
;
How the brain creates
false memories
; How false memories
are formed
;
Development of working
memory with age
;
New technique sheds light on autobiographical memory
; Different brain
regions for arousing and non-arousing words
; More evidence for
active forgetting ;
How emotions interfere with staying focused
; Age-related
changes in brain dopamine may underpin the normal cognitive problems
of aging ;
Physical brain changes with advancing age
premotor
cortex: is part of the motor cortex, located in the
frontal lobe. It is adjacent to the primary
motor area. It is located primarily in the precentral gyrus and
caudal portions of the superior frontal gyrus and the
middle frontal gyrus.
What we perceive is
not what we sense ;
Brain regions that
process reality and illusion identified ;
Reading verbs activates motor cortex areas
primary auditory cortex: see Heschl's gyrus.
primary motor
cortex: is in the precentral gyrus in
the frontal lobe. It is one of three parts of
the motor cortex, the others being the premotor
cortex, and the supplementary motor cortex.
How sleep improves memory
; Brain regions that
process reality and illusion identified ;
Reading verbs activates motor cortex areas
primary
visual striate cortex: is located largely on the medial
surface of the occipital lobe. This is
where visual images, having been dissected by the retina, begin to
be reassembled for further processing (in adjacent areas).
More complex brain may have pre-dated Homo genus
R
right
intraparietal sulcus: a
sulcus in the right
parietal lobe, implicated in dyscalculia
Right parietal
lobe implicated in dyscalculia
right parietal lobe: part of the parietal cortex, implicated in numerical processing.
right putamen:
part of the basal ganglia; active during both
procedural and declarative learning. (see left
prefrontal cortex and left inferior
parietal cortex)
AIDS-related cognitive
impairment exists in two separate forms ;
Learning a sequence
with explicit knowledge of that sequence involves same
S
somatosensory
neocortex: or primary somesthetic area / primary somatic
sensory area. It is located in the parietal lobe,
and deals with information from the various "touch" receptors, such
as temperature, pressure, limb position, movement, pain, etc. It has
been implicated in the processes by which memories (or some type of
them) are consolidated during sleep.
What we perceive is
not what we sense ;
Another step in
understanding how sleep affects memory
striatum:
includes the
caudate nucleus and the
putamen; part of the basal ganglia.
Implicated in habit learning.
Common gene version
optimizes thinking but carries a risk ;
How
multitasking impedes learning
subgenual area 25: also known as area 25 of Brodmann-1905; a
subdivision of the
cingulate region
Fitness counteracts
cognitive decline from hormone-replacement therapy
subiculum: a substructure of the
hippocampus, active during the retrieval of newly-learned face-name
associations (but less so as retrieval became more practiced).(also see
dentate gyrus and
cornu ammonis)
Hippocampus and subiculum both critical for short-term memory
; More details
about how memories are formed in the hippocampus
substantia nigra:
a group of cells in the midbrain that use
dopamine, and
connect to the striatum
Novelty aids
learning
sulcus: a cleft or fissure in the cerebrum (compare gyrus)
superior
parietal cortex: a region in the upper part of the
parietal lobe.
Exercise improves attention and decision-making among seniors
;
Training improves working memory capacity
superior
temporal gyrus: a gyrus in the upper
part of the temporal lobe. Contains the
primary auditory cortex. The anterior part
of this region has been implicated in generating the aha! experience
of insight.
Brain region
involved in insight localized
superior temporal sulcus: a sulcus in the upper part of the temporal lobe.
T
temporal lobe:
one of the
lobes of the cerebrum,
situated below the
frontal and parietal
lobes, and above the
hindbrain. The temporal lobe is primarily
concerned with sensory experience - specifically, with hearing, and
with the integration of information from multiple senses. Part of
the temporal lobe also plays a role in memory processing. Patients
with damaged temporal lobes appear to have impaired lexical
retrieval of names of living things.
Why music training helps language;
How does the
bilingual brain distinguish between languages? ;
Specific brain
region for reading
; How higher
education protects older adults from cognitive decline ;
IQ-related brain areas may differ in men and women
; Intelligence
based on the volume of gray matter in certain brain regions
;
Maturation of the
human brain mapped ;
Separate brain regions for living vs nonliving categories
temporal pole:
is at the anterior tip of the temporal lobe.
It is part of the paralimbic zone and is
involved in the retrieval of episodic and semantic memory, and the
processing of familiar and emotional stimuli such as faces.
How sleep improves memory
temporoammonic (TA)
projection: a circuit in the brain directly linking the CA1
region of the hippocampus and the
neocortex. Apparently crucial in converting short-term memories
into long-term memories.
Brain circuit crucial for memory consolidation identified
thalamus:
means "inner chamber", and accordingly is located deep within the
cerebrum. It is an egg-shaped structure lying at the very top of
the brain stem, above the hypothalamus. The thalamus relays all
information received from the senses (except smell) to the various
processing centers in the cerebral cortex.Recent research also
suggests that the thalamus regulates the electrical rhythms that
parts of the brain use to communicate with each other. It has been
speculated that tips of the tongue experiences (when only part of a
memory is recalled) may occur when the rhythms don't synchronize
with the regions properly - which would put these memory failures at
the door of the thalamus. The thalamus also seems to be involved in
memory consolidation processes that occur during sleep.
Another step in understanding how sleep affects memory ;
Memories may be hard to find when thalamus fails to synchronize
rhythms
V
ventromedial
part of the prefrontal cortex: the rear part of the
prefrontal cortex, including the cortex on top of the orbits of
both eyes and the inside part of the frontal lobes.
Some brain injuries may reduce the likelihood of PTSD
; How the brain handles sarcasm
W
Wernicke's area:
is one of the primary auditory areas. The structure includes part of
the supramarginal gyrus, the angular gyrus, the
superior temporal gyrus and the middle temporal gyrus. It is
involved in language comprehension - specifically, allows you to
understand the meaning of spoken words.
Third language area in brain identified
; Imaging reveals a
biological basis for autism
;
Reading verbs activates motor cortex areas
Other resources on the Web:
if you're into neuroimaging, you can leaf through a "brain atlas" at http://www.med.harvard.edu/AANLIB/home.html
at a much more accessible level (and rather more fun), PBS have a "3-dimensional" tour of the brain at http://www.pbs.org/wnet/brain/3d/index.html (you do need Shockwave to view this)
you can also look up names of brain structures at http://braininfo.rprc.washington.edu/mainmenu.html


