21 female, 3 male,who were matched for sex and age, into two groups, designated as jugglers and non-jugglers Both groups were inexperienced in juggling at the time of their first brain scan. Subjects in the juggler group were given 3 months to learn a classic three-ball cascade juggling routine.
A second brain scan was performed when they had become skilled performers
A third scan was carried out 3 months later; during the intervening period, none of the jugglers practised or attempted to extend their skills
At the begging no difference between both groups; In the second scan there was an expansion in the juggler group; In the third one the expansion decreased
Our results contradict the traditionally held view that the anatomical structure of the adult human brain does not alter. Our findings indicate that learning-induced cortical plasticity is also reflected at a structural level .
the perception and spatialanticipation of moving objects, is a strongerstimulus for structural plasticity in thevisual areas, than in motor areas