Callosal transfer and left-hand anomia in schizophrenia.

The theory of callosal failure in schizophrenia is examined using the test for left-hand anomia. It is argued that if the corpus callosum is affected in schizophrenia with consequent difficulty of transmission between the two sides of the brain, a greater number of left-hand errors should be found in producing the names of objects held by that hand because the speech area of the left hemisphere is no longer available for the description of the perceptions of the left hand. The findings support this view and they confirm the communication failures of the brain related to callosal disturbance.