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Related Experiment Video

Updated: Jul 10, 2026

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

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

Published on: August 1, 2018

Target selection for visually guided reaching in macaque.

Joo-Hyun Song1, Naomi Takahashi, Robert M McPeek

  • 1Smith-Kettlewell Eye Research Institute, 2318 Fillmore St., San Francisco, CA 94115, USA. jhsong@ski.org

Journal of Neurophysiology
|November 9, 2007
PubMed
Summary

Monkeys improved visually guided reaching and target selection with more distractors. Recent trial history, like color priming, also enhanced reach speed and accuracy.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Primate Vision

Background:

  • Visual search and target selection are crucial for goal-directed actions.
  • Understanding how the brain processes visual information to guide movements is a key research area.

Purpose of the Study:

  • To investigate target selection mechanisms for visually guided reaching in monkeys.
  • To determine the influence of distractor quantity and trial history on reaching behavior.

Main Methods:

  • Monkeys performed a visual search task with varying numbers of distractors.
  • Target and distractor colors (red/green) were randomized or consistent across trials.
  • Reach movements and latencies were analyzed under different search conditions.

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In Vivo Wireless Optogenetic Control of Skilled Motor Behavior

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Related Experiment Videos

Last Updated: Jul 10, 2026

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

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

Published on: August 1, 2018

Design and Use of an Apparatus for Presenting Graspable Objects in 3D Workspace
09:11

Design and Use of an Apparatus for Presenting Graspable Objects in 3D Workspace

Published on: August 8, 2019

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior
07:52

In Vivo Wireless Optogenetic Control of Skilled Motor Behavior

Published on: November 22, 2021

Main Results:

  • Increased homogenous distractors improved target selection accuracy and speed.
  • Sparse distractors led to longer movement durations and increased trajectory curvature.
  • Color priming and recent trial difficulty modulated reach performance, indicating adaptive motor strategies.

Conclusions:

  • Monkey reaching behavior mirrors human performance, validating the monkey as a model for studying reach target selection.
  • The findings shed light on the neural mechanisms underlying visual guidance of reaching and the role of attention.