If Savantism Is Due to Impaired Functioning in Some Brain

Multiple Choice

If savantism is due to impaired functioning in some brain areas while other areas experience enhanced functioning,then it might be possible to produce a transient savant condition;has this ever been demonstrated and,if yes,how?

A) No,it has not been demonstrated.
B) Yes,it has,with short-acting anesthetics delivered to one hemisphere.
C) Yes,it has,with unilateral electroconvulsive therapy.
D) Yes,it has,with transcranial magnetic stimulation.