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The functional roles of neural remapping in cortex
James W Bisley1,2,3, Koorosh Mirpour1, Yelda Alkan1
1Department of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
Journal of Vision
|September 5, 2020
Summary
Neurons remap their responses during eye movements (saccades) to maintain visual stability. This study reveals distinct roles for remapping in the lateral intraparietal area and frontal eye field, impacting visual perception and future actions.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Visual Neuroscience
Background:
- Neuronal remapping updates responses during eye movements (saccades) to compensate for retinal stimulus shifts.
- Traditional physiological tests involve single stimulus presentation around saccades.
- A novel approach examines neural signal emergence during saccades across stable scenes.
Purpose of the Study:
- To investigate the functional role of neuronal remapping using a new experimental paradigm.
- To differentiate the contributions of remapping in specific brain areas to visual processing and behavior.
Main Methods:
- Recording neural activity during saccades across stable visual scenes.
- Analyzing the timing of neural signal emergence relative to saccade onset.
- Comparing remapping properties in the lateral intraparietal area (LIP) and frontal eye field (FEF).
Main Results:
- Remapping in the lateral intraparietal area appears sufficient for maintaining visual stability across saccades.
- In the frontal eye field, remapped activity influences future saccadic choices.
- A distinct subset of frontal eye field neurons uses remapping to retain information about previously fixated locations.
Conclusions:
- The functional role of neuronal remapping varies across brain regions.
- Lateral intraparietal area remapping is crucial for visual stability.
- Frontal eye field remapping serves roles in both action selection and spatial memory.
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