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Related Experiment Video

Updated: Jun 6, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
07:08

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Published on: August 1, 2018

A motion direction map in macaque V2.

Haidong D Lu1, Gang Chen, Hisashi Tanigawa

  • 1Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA. haidong@ion.ac.cn

Neuron
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

Researchers found no motion direction maps in macaque primary visual cortex (V1). However, robust direction maps were identified in the second visual cortex (V2), suggesting V2

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Area of Science:

  • Neuroscience
  • Visual Processing
  • Mammalian Visual Cortex

Background:

  • Motion perception in mammals originates in the visual cortex.
  • Previous research in monkey V1 and V2 lacked evidence for direction maps.
  • Studies in other mammals like cats and ferrets have shown direction maps.

Purpose of the Study:

  • To investigate the organization of motion response in macaque V1 and V2.
  • To determine the presence and organization of direction maps in these visual areas.

Main Methods:

  • Utilized optical imaging techniques.
  • Studied motion response in macaque V1 and V2.

Main Results:

  • No direction maps were found in macaque V1.
  • Robust direction maps were identified in V2 thick/pale stripes, but not thin stripes.
  • Direction maps in V2 often displayed pinwheel or linear organizations within thick stripes.

Conclusions:

  • Macaque V2 plays a significant role in motion processing.
  • These findings highlight V2's contribution to both dorsal (motion perception) and ventral (form perception) visual pathways.
  • The absence of direction maps in V1 contrasts with findings in other mammals.