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Scene-Selectivity and Retinotopy in Medial Parietal Cortex.
Edward H Silson1, Adam D Steel2, Chris I Baker1
1Laboratory of Brain and Cognition, National institute of Mental Health Bethesda, MD, USA.
Frontiers in Human Neuroscience
|September 3, 2016
Summary
Researchers identified a new scene-selective region in the medial parietal cortex, termed the medial place area (MPA). This area shows visual field biases and connects with other scene-processing regions, suggesting a role in spatial representation.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Visual Perception
Background:
- Scene-selective regions like OPA, PPA, and RSC are crucial for visual processing.
- Previous studies noted distinct retinotopic biases in OPA and PPA.
- Medial parietal cortex's role in scene and retinotopic processing requires further investigation.
Purpose of the Study:
- To map scene-selective and retinotopic processing in medial parietal cortex.
- To investigate the functional connectivity of this medial region.
- To characterize the newly identified medial place area (MPA).
Main Methods:
- Functional magnetic resonance imaging (fMRI).
- Population receptive field (pRF) mapping.
- Category-selectivity mapping.
- Resting-state functional connectivity analysis.
Main Results:
- A novel medial scene-selective region, MPA, was identified in the parieto-occipital sulcus.
- MPA showed a contralateral visual field bias and large pRF sizes, without a consistent quadrant preference.
- MPA co-localized with retinotopic sensitivity and exhibited differential functional connectivity with PPA and FFA.
Conclusions:
- MPA is a distinct scene-selective region in medial parietal cortex with specific visual field biases.
- Its connectivity patterns suggest integration with ventral visual streams.
- A posterior-to-anterior gradient in medial parietal cortex may reflect a transition from retinotopic scene selectivity to abstract spatial and mnemonic representations.
Keywords:
memorypopulation receptive fieldsresting-state functional connectivityretinotopyscene-selectivityMore Related Videos
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