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Bilateral Putamen's Hypodensity on Cranial Computed Tomography in Cerebral Palsy Patients with Perinatal Anoxic Brain Damage

Five pediatric cases of cerebral palsy which had suffered from severe asphyxia in a neonatal period and presented focal low density in the area of bilateral putamens are described here. Four cases in which detailed neuro-developmental examination was conducted personally by the authors showed spastic diplegia or quadriplegia with at he to tic elements without exception. Three cases had past histories of infantile spasms, and presented obviously abnormal eye movements in common. In spite of marked spasticity of extremities, truncal hypotonia became evident when the patients were suspended in a prone position (Landau’s reflex) in two cases. Then we speculated the possibility that dysfunction of the bilateral putamen was in some way responsible for this muscle tone abnormality.