And more on the neurology of deceit -- a recent study has found distinct structural differences in the brains of pathological liars, confirming previous research indicating the prefrontal cortex is crucially involved in lying, and suggesting an important difference in white and grey matter. The findings suggest pathological liars have two things going for them: a greater verbal talent, and a reduced ability to make moral decisions -- reflections of a surplus of white matter and a proportionate deficit in grey matter in this brain region. Interestingly, other studies of autistic children (who have trouble lying) show the opposite pattern of gray matter/white matter ratios.