The prefrontal cortico-oculomotor trajectories in the monkey.

Prefrontal corticofugal systems, as studied with anterograde HRP histochemistry, revealed projections to preoculomotor and oculomotor centers in the diencephalon and brainstem which may underlie direct cortical influence on eye movement. Because of the location of these preoculomotor trajectories, stimulation and lesion experiments affecting ocular motility may be explained by having involved prefrontal projections which have their origin in sulcus principalis or prearcuate area 8 (frontal eye field) cortex.