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Published on: August 12, 2019
A ventro-temporal area supporting human allocentric representations
Prosper A Fiave1, Giulia Marin1, Thibaud Delavy1
1Department of Basic Neurosciences, University of Geneva, Campus Biotech, Chemin des Mines 9, 1202 Geneva, Switzerland.
Current Biology : CB
|July 20, 2026
Summary
Understanding object locations in space requires both body-centered and object-centered processing. New research reveals the posterior infero-temporal cortex (PIT) integrates object and spatial information for allocentric representation.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Processing
Background:
- Everyday tasks rely on egocentric and allocentric spatial understanding.
- Allocentric computation deficits have clinical impacts, but neural underpinnings are unclear.
- Existing models propose distinct visual streams for object recognition and spatial processing.
Purpose of the Study:
- Investigate the role of posterior infero-temporal cortex (PIT) in allocentric spatial representation.
- Determine if PIT integrates object and spatial information.
- Differentiate PIT's function from adjacent visual areas.
Main Methods:
- Novel behavioral paradigm with fMRI (task-based and resting-state).
- Multivariate and representational similarity analyses.
- Functional connectivity analyses.
Main Results:
- PIT shows selective engagement in allocentric processing, distinct from category-selective cortex.
- PIT supports category-general allocentric representations, separate from egocentric ones in posterior parietal cortex.
- PIT exhibits flexible, task-dependent connectivity with ventral visual areas during allocentric tasks.
Conclusions:
- PIT is a critical node integrating object and spatial information.
- PIT links ventral object representations with dorsal spatial processing.
- Findings advance understanding of human visuospatial cognition.
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