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 (area 17) of the old-world monkey Macacus nemestrinus. Eight pyramidal neurons, seven spiny stellate neurons, two basket cells, a clutch cell, and a chandelier cell were filled intracellularly with HRP. Their receptive fields were consistent with previous single-unit studies. Their axonal arbors were less elaborate than in equivalent neurons in the cat, but the laminar specificity of the boutons was very much more precise in the monkey than in the cat. Nevertheless, the basic cortical circuits in cat and monkey appear to be very similar.