Form, Function, and Intracortical Projections of Neurons in the Striate Cortex of the Monkey Macacus nemestrinus

Single neurons were recorded in the striate visual cortex (area17) of the old-world monkey Macacus namestrinus. Eight pyramidalneurons, seven spiny stellate neu rons, two basket cells, aclutch cell, and a chandelier cell were filled intracellularywith HRP. Their receptive fields were consistent with previoussingle-unit studies. Their axonal arbors were less elaboratethan in equivalent neurons in the cat, but the laminar specificityof the houtons was very much more precise in the monkey thanin the cat. Nevertheless, the basic cortical circuits in catand monkey appear to hevery similar.