This review yields three conclusions: first, the eye field as describe
d using unit recording and electrical stimulation on behaving monkeys
trained to fixate visual targets is much larger than the 4 mm(2) area
originally described. Second, the eye field and forelimb field share a
similar neural space within the dorsomedial frontal cortex (DMFC); th
us the electrophysiogical studies that have been conducted on visually
guided and sensory-triggered forelimb movements must be re-evaluated,
since none of these studies controlled eye movement and eye position
independently. Third, a topographic map representing eye position in o
rbit has been discovered in the DMFC; it is proposed that this topogra
phic map records the order of positions of the eyes and forelimbs duri
ng the acquisition of visually guided movement sequences.