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Updated: Jan 30, 2026
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Visualization of Cortical Modules in Flattened Mammalian Cortices
Published on: January 22, 2018
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Selective Modulation of Early Visual Cortical Activity by Movement Intention.
Jason P Gallivan1,2,3, Craig S Chapman4, Daniel J Gale3
1Department of Psychology, Queen's University, Kingston, Ontario, Canada.
Cerebral Cortex (New York, N.Y. : 1991)
|January 23, 2019
Summary
Movement planning influences early visual cortex activity, showing effector and action details before movement. This suggests early visual areas play a role in estimating movement consequences.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- The primate visual system features extensive feedback projections from higher to lower cortical areas.
- This architecture is known to modulate early visual areas during working memory and attention.
Purpose of the Study:
- To investigate if feedback projections modulate early visual cortical activity during the planning of visually guided actions.
- To determine if motor information is represented in early visual cortex before movement execution.
Main Methods:
- Three functional magnetic resonance imaging (fMRI) studies in humans.
- Analysis of object-directed movements and planning phases.
- Decoding of motor effector and action goal information from early visual cortex.
Main Results:
- Motor effector (limb, eye) and action goal (grasp, reach) information were decoded from early visual cortex representations of target objects prior to movement.
- During sequential action planning, motor information was decoded from multiple object locations in retinotopic cortex.
- Movement planning selectively modulated early visual cortical activity in an effector-specific, target-centric, and task-dependent manner.
Conclusions:
- Early visual cortex activity patterns are modulated by movement planning.
- This modulation is specific to the effector, target, and task.
- Early visual cortex may contribute to sensorimotor estimations of movement's visual outcomes.
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