Abstract
The neurolinguistic deficits observed in a case of perivenous encephalomyelitis affecting the centrum semiovale of the cerebral hemispheres are reported, and shown to be reminiscent both of the verbal disorders found in some patients with extrapyramidal diseases and the verbal disturbances that may result from a frontal cortical or a thalamic lesion. The sympotomatology is explained in terms of a partial disconnection between the cortex, the basal ganglia and the diencephalon.