Gaze-Centered Updating of Visual Space in Human Parietal Cortex
Open Access
- 16 July 2003
- journal article
- clinical trial
- Published by Society for Neuroscience in Journal of Neuroscience
- Vol. 23 (15) , 6209-6214
- https://doi.org/10.1523/jneurosci.23-15-06209.2003
Abstract
Single-unit recordings have identified a region in the posterior parietal cortex (PPC) of the monkey that represents and updates visual space in a gaze-centered frame. Here, using event-related functional magnetic resonance imaging, we identified an analogous bilateral region in the human PPC that shows contralateral topography for memory-guided eye movements and arm movements. Furthermore, when eye movements reversed the remembered horizontal target location relative to the gaze fixation point, this PPC region exchanged activity across the two cortical lobules. This shows that the human PPC dynamically updates the spatial goals for action in a gaze-centered frame.Keywords
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