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Related Experiment Video

Updated: Jun 4, 2026

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum
07:30

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum

Published on: March 21, 2019

Reaction time correlations during eye-hand coordination: behavior and modeling.

Heather L Dean1, Daniel Martí, Eva Tsui

  • 1Center for Neural Science, New York University, New York, New York 10003, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|February 18, 2011
PubMed
Summary

Correlations between saccade reaction times (SRTs) and reach reaction times (RRTs) suggest effector-specific coordination. Mutual excitation between neural integrators likely underlies these linked movement preparations.

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Area of Science:

  • Neuroscience
  • Movement Science
  • Computational Modeling

Background:

  • Reaction times (RTs) reflect movement preparation but can be influenced by general factors like motivation.
  • Correlations between saccade reaction times (SRTs) and reach reaction times (RRTs) are observed in coordinated eye-hand movements.
  • Distinguishing specific coordination mechanisms from nonspecific influences is crucial for understanding movement control.

Purpose of the Study:

  • To identify mechanisms underlying SRT and RRT correlations during coordinated eye-hand movements.
  • To differentiate between effector-specific coordination and nonspecific influences on reaction times.
  • To test predictions derived from integrate-to-threshold models of reaction time.

Main Methods:

  • A dual-task paradigm with varying stimulus onset asynchrony (SOA) was employed.

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  • Behavioral psychophysics in three monkeys performing eye-hand tasks.
  • Computational modeling using variants of integrate-to-threshold models.

    • Main Results:

    • RT correlations decreased as SOA duration increased.
    • Shorter SOAs led to decreased saccade reaction times, indicating facilitation.
    • Results supported a model of mutual excitation between effector-specific integrators.

    Conclusions:

    • RT correlations are not solely due to motivation or arousal.
    • The findings suggest that RT correlations are a signature of specific motor coordination mechanisms.
    • Mutual excitation between neural integrators may underlie coordinated eye-hand movements.