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Parietal Cortex Integrates Saccade and Object Orientation Signals to Update Grasp Plans by Baltaretu, Bianca R.; Monaco, Simona; Velji-Ibrahim, Jena; Luabeya, Gaelle N.; Crawford, J. Douglas is a Neuroscience article available to read on EtoBox.

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Coordinated reach-to-grasp movements are often accompanied by rapid eye movements (saccades) that displace the desired object image relative to the retina. Parietal cortex compensates for this by updating reach goals relative to current gaze direction, but its role in the integration of oculomotor and visual orientation signals for updating grasp plans is unknown. Based on a recent perceptual experiment, we hypothesized that inferior parietal cortex (specifically supramarginal gyrus [SMG]) integrates saccade and visual signals to update grasp plans in additional intraparietal/superior parietal regions. To test this hypothesis in humans (7 females, 6 males), we used a functional magnetic resonance paradigm, where saccades sometimes interrupted grasp preparation toward a briefly presented object that later reappeared (with the same/different orientation) just before movement. Right SMG and several parietal grasp regions, namely, left anterior intraparietal sulcus and bilateral superior parietal lobule, met our criteria for transsaccadic orientation integration: they showed task-dependent saccade modulations and, during grasp execution, they were specifically sensitive to changes in o

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Author

Baltaretu, Bianca R.; Monaco, Simona; Velji-Ibrahim, Jena; Luabeya, Gaelle N.; Crawford, J. Douglas

Publisher

Society for Neuroscience (ISSN 0270-6474)

Published

2020

Language

EN

Field

Neuroscience (Life Sciences)