Studies of sign language aphasia in deaf adults have provided the evidence
for two separable verbal and nonverbal manual gesture systems. We report a
congenitally deaf child with a idiopathic focal epilepsy of childhood who s
howed specific language impairment in French sign language. The child's ama
zing performances in miming or sketching pictures she was unable to sign su
pport the notion of an early dissociation of the two gestural systems.