Postictal Capgras syndrome.

The Capgras syndrome of delusions that familiar persons are being impersonated by identical doubles has occasionally been associated with cerebral disease, often of the nondominant hemisphere. A patient with chronic right cerebral hemisphere dysfunction and complex partial seizures of right temporal origin manifested the Capgras syndrome in the postictal state, and the delusions ceased with optimal seizure control. The delusions could result from postictal disinhibition of dominant hemisphere recognition functions, or from dysfunction of nondominant hemisphere centers involved in perceptual integration.