Ischemic lesions in basal ganglia in children after minor head injury.

Twenty-three children under the age of 6 1/2 years developed immediate unilateral weakness after an apparently minor head injury. Computed tomography disclosed a hypodense lesion in the basal ganglia. The lesion appeared to be caused by an infarct in the basal ganglia. All but one of the children recovered completely within 4 months.