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Related Experiment Video

Updated: Oct 26, 2025

Assessing Corticospinal Excitability During Goal-Directed Reaching Behavior

Assessing Corticospinal Excitability During Goal-Directed Reaching Behavior

Published on: December 2, 2022

Gaze control during reaching is flexibly modulated to optimize task outcome.

Naotoshi Abekawa^1,2, Hiroaki Gomi¹, Jörn Diedrichsen^3,2

¹NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan.

Journal of Neurophysiology

|July 29, 2021

Summary

Gaze anchoring during reaching is flexibly adjusted by task demands. The brain suppresses fast saccades to improve reach accuracy, demonstrating adaptive eye-hand coordination based on reward contingencies.

Keywords:

eye-hand coordination human visuomotor control

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Last Updated: Oct 26, 2025

Assessing Corticospinal Excitability During Goal-Directed Reaching Behavior

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Area of Science:

Neuroscience
Motor Control
Human Behavior

Background:

Gaze anchoring, the fixation of gaze on a reach target, is crucial for eye-hand coordination.
Traditional views emphasize intrinsic motor system linkages, while optimal control theories highlight task-dependent adaptation.
The modulation of gaze control by specific task demands remains an active area of research.

Purpose of the Study:

To investigate how task demands flexibly modulate gaze control during reaching.
To determine the extent to which gaze anchoring is adjusted based on reward contingencies.
To understand the underlying mechanisms of gaze control adaptation during reaching tasks.

Main Methods:

Utilized a gaze-anchoring paradigm where participants reached for a target.
Introduced a secondary task requiring saccadic eye movements to visual cues during the reach.
Manipulated reward contingencies for saccade reaction time and reaching accuracy.

Main Results:

Saccade reaction times and reach errors systematically varied with reward conditions.
Increased reward for reach accuracy reduced fast saccades, improving precision.
Early saccades were associated with larger reach errors, suggesting a cost to early eye movements.

Conclusions:

Gaze anchoring is not a fixed linkage but an adaptively regulated process.
The brain suppresses fast saccades to optimize reaching performance based on task goals.
This study reveals flexible inhibitory online coordination between the eye and hand systems modulated by task requirements.