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Updated: Jun 10, 2025
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Chronic Implantation of Whole-cortical Electrocorticographic Array in the Common Marmoset
Published on: February 1, 2019
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Functional specialization and distributed processing across marmoset lateral prefrontal subregions
Raymond Ka Wong1,2, Janahan Selvanayagam1,2, Kevin Johnston1,2,3
1Graduate Program in Neuroscience, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada.
Cerebral Cortex (New York, N.Y. : 1991)
|October 11, 2024
Summary
Neurophysiological mapping of the common marmoset lateral prefrontal cortex reveals mixed functional specialization. Some sensory, social, and cognitive processes are broadly distributed, while others show restricted representations in specific subregions.
Area of Science:
- Neuroscience
- Primate Brain Organization
- Cognitive Neuroscience
Background:
- The primate lateral prefrontal cortex (lPFC) is cytoarchitecturally divided into distinct subregions.
- Previous macaque studies suggest functional specialization but lack a unified representational topography for sensory, social, and cognitive processes.
- Varied methodologies across studies hinder a comprehensive understanding of lPFC functional organization.
Purpose of the Study:
- To conduct large-scale neurophysiological mapping of the common marmoset lPFC.
- To investigate the representational topography of sensory, social, and cognitive functions within lPFC subregions.
- To clarify the pattern of functional specialization across the lPFC.
Main Methods:
- Utilized high-density microelectrode arrays for neurophysiological mapping in common marmosets.
- Employed a diverse stimulus set including faces, marmoset calls, and a spatial working memory task.
- Recorded task-modulated and stimulus-responsive neuronal activity across lPFC subregions.
Main Results:
- Task-modulated and visual/auditory responsive units were broadly distributed across the lPFC.
- Saccade-related activity and face-selective responses were localized to specific areas (8aV, 8aD, 10, 46V, 47).
- Neurons with contralateral visual receptive fields were confined to areas 8aV and 8aD.
Conclusions:
- The lPFC exhibits a mixed pattern of functional specialization.
- Some cognitive and sensory processes are broadly represented, while others are restricted to specific subregions.
- This study provides a detailed map of functional organization within the primate lPFC.
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