Abstract
Cortical afferents to the prefrontal cortex were studied in 10 bush babies (Galago senegalensis) by means of somatopetal transport of horseradish peroxidase. The lateral injections invariably labeled neurons in the temporal cortex and in most cases also in the insular and parietal regions. In some of these brains the cingulate and retrosplenial areas contained labeled perikarya. Injections into the medial cortex, on the other hand, consistently labeled cell bodies in the cingulate cortex, but not in the insular, temporal and parietal regions. When both lateral and medial sites of the bush baby's prefrontal cortex are considered together, apparently fewer cortical areas (as defined by Brodmann's cytoarchitectonic maps) project to the prefrontal cortex in the bush baby than in the rhesus monkey. This statement holds for both ipsi- and contralateral projections.
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