Interhemispheric connections of prestriate cortex in monkey

Abstract

1. 1. The interhemispheric connections of the prestriate area have been studied following section of the splenium in 6 monkeys. 2. 2. At least 6 patches of degeneration following splenial section are seen in the prestriate cortex. These are separate superiorly and inferiorly and come together at the middle. 3. 3. All the regions of degeneration, save one, are known to receive fibers from the striate cortex. 4. 4. The laminar distribution of the degeneration varies at different survival times. At 4 days, it involves all layers though mainly 4, 5 and 6. At later survival times of 10 and 32 days layers 2 and 3 are minimally involved and the degeneration in layer 1 is less than in layers 4, 5 and 6. Additionally, some regions of connection with the opposite hemisphere show degeneration earlier than other. 5. 5. The findings in this work are discussed in relation to previous studies.