Frames of reference for eye-head gaze commands in primate supplementary eye fields |
| |
Authors: | Martinez-Trujillo Julio C Medendorp W Pieter Wang Hongying Crawford J Douglas |
| |
Institution: | Laboratory of Visuomotor Neuroscience, Centre for Vision Research, Canadian Institutes of Health Research, Group for Action and Perception and Department of Psychology, CSB York University, Toronto, Ontario M3J 1P3, Canada. julio.martinez@mcgill.ca |
| |
Abstract: | The supplementary eye field (SEF) is a region within medial frontal cortex that integrates complex visuospatial information and controls eye-head gaze shifts. Here, we test if the SEF encodes desired gaze directions in a simple retinal (eye-centered) frame, such as the superior colliculus, or in some other, more complex frame. We electrically stimulated 55 SEF sites in two head-unrestrained monkeys to evoke 3D eye-head gaze shifts and then mathematically rotated these trajectories into various reference frames. Each stimulation site specified a specific spatial goal when plotted in its intrinsic frame. These intrinsic frames varied site by site, in a continuum from eye-, to head-, to space/body-centered coding schemes. This variety of coding schemes provides the SEF with a unique potential for implementing arbitrary reference frame transformations. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|