Another piece of research emphasizing the effect of practice on the brain (in an entirely physical sense). The imaging study looked at activity in the brains of violinists and non-violinists when they moved their fingers on a violin string. The differences in the activity patterns demonstrates that practicing had "rewired" the brain, confirming a number of studies.
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The whole nature-nurture debate, so long argued, looks like finally being sorted out in our time, through the powerful concept of gene expression. The latest study is an important step, involving an epigenetic study of more than 40 pairs of twins. To discover how environmental influences, such as exposure to pollutants, consumption of certain foods, perhaps even powerful emotional experiences, produce significant changes in a person's DNA, researchers focused on two biological mechanisms: DNA methylation, a process which results in the deactivation of a gene, and histone acetylation, whereby a dormant gene is re-activated. 35% of twin pairs had significant differences in their DNA methylation and histone modification profiles, with those twins who had spent most time apart having the greatest differences.