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Disparity Sensitivity of Frontal Eye Field Neurons

2000; American Physiological Society; Volume: 83; Issue: 1 Linguagem: Inglês

10.1152/jn.2000.83.1.625

1522-1598

Stefano Ferraina, Martin Paré, Robert H. Wurtz,

Retinal Development and Disorders

Information about depth is necessary to generate saccades to visual stimuli located in three-dimensional space. To determine whether monkey frontal eye field (FEF) neurons play a role in the visuo-motor processes underlying this behavior, we studied their visual responses to stimuli at different disparities. Disparity sensitivity was tested from 3 degrees of crossed disparity (near) to 3 degrees degrees of uncrossed disparity (far). The responses of about two thirds of FEF visual and visuo-movement neurons were sensitive to disparity and showed a broad tuning in depth for near or far disparities. Early phasic and late tonic visual responses often displayed different disparity sensitivity. These findings provide evidence of depth-related signals in FEF and suggest a role for FEF in the control of disconjugate as well as conjugate eye movements.