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Related Experiment Video

Updated: Apr 27, 2026

Visualization of Cortical Modules in Flattened Mammalian Cortices

Visualization of Cortical Modules in Flattened Mammalian Cortices

Published on: January 22, 2018

Functional specialization in rat occipital and temporal visual cortex.

Ben Vermaercke¹, Florian J Gerich¹, Ellen Ytebrouck²

¹Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium; and.

Journal of Neurophysiology

|July 4, 2014

Summary

This summary is machine-generated.

Researchers studied the rat visual cortex, finding gradual changes in how neurons process shapes and motion across five visual areas. This reveals insights into hierarchical visual processing similarities between rats and primates.

Keywords:

high-level vision population coding position tolerance rodent research single-unit recordings

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Visualization of Cortical Modules in Flattened Mammalian Cortices

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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

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Published on: August 1, 2018

Area of Science:

Neuroscience
Comparative Cognition

Background:

Rodent visual cortex shows functional specialization.
Hierarchical pathways, similar to primate ventral and dorsal streams, are suggested in rodents.

Purpose of the Study:

Characterize functional properties in the presumed rat ventral visual pathway.
Investigate visual processing across a hierarchy of rat visual areas.

Main Methods:

Recorded neural activity in five awake rat visual areas (V1, LM, LI, LL, TO).
Assessed response latency, orientation/direction selectivity, and shape/motion processing.
Utilized computational modeling to analyze neural similarity for shapes.

Main Results:

Response latency increased from V1 to LL/TO.
Orientation and direction selectivity increased gradually from V1 to TO.
Shape responsiveness decreased, becoming motion-dependent, with increasing positional tolerance toward TO.

Conclusions:

Findings suggest a hierarchical organization in the rat ventral visual stream.
Demonstrate gradual functional changes across visual areas, akin to primate processing.
Provide insights into conserved and divergent mechanisms of visual processing between rodents and primates.