Projections from the functional subdivisions of the frontal eye field to the superior colliculus in the monkey.

The frontal eye field (FEF) can be divided into the lateral subdivision representing the central visual field (VF), and the medial subdivision representing the peripheral VF. In this report, we examined neurally projected parts within the superior colliculus (SC) from those electrophysiologically identified subdivisions in the FEF using the horseradish peroxidase anterograde transport method. We found that the lateral subdivision projected into the anterolateral portion of the SC, whereas the medial one into the posteromedial portion, indicating that there is a correlation in the VF representation between the source and the target of this corticotectal system.