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Related Experiment Video

Updated: Apr 5, 2026

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

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Published on: January 15, 2018

Anticipatory gaze strategies when grasping moving objects.

Melissa C Bulloch¹, Steven L Prime^2,3, Jonathan J Marotta²

¹Perception and Action Lab, Department of Psychology, University of Manitoba, Winnipeg, MB, R3T-2N2, Canada. melissabulloch@gmail.com.

Experimental Brain Research

|August 21, 2015

Summary

Grasping moving objects requires predicting future positions. Gaze and hand movements adapt to target speed and direction, with direction significantly influencing interception strategies.

Keywords:

Eye–hand coordination Fixation locations Grasping Moving objects Visuomotor control

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Area of Science:

Neuroscience
Human Motor Control
Perception-Action

Background:

Grasping moving objects necessitates spatial and temporal predictions.
Previous research indicated gaze fixation on the eventual index finger contact point for stationary objects.

Purpose of the Study:

To investigate the impact of target speed and direction on gaze control and grasp point selection during interception.
To understand how humans predict and adapt to moving targets.

Main Methods:

Participants reached to grasp computer-generated blocks moving at varying speeds and directions.
Eye-tracking and kinematic data were collected to analyze gaze behavior and hand movements.

Main Results:

Initial fixation was ahead of the target, shifting to the leading edge upon movement onset.
Final fixations were near the index finger contact point, similar to stationary object grasps.
Target direction, more than speed, influenced fixation locations and grasp points.

Conclusions:

Gaze and hand movements are dynamically adjusted based on target motion characteristics.
Direction of movement plays a critical role in predictive gaze control and grasp planning for interception.
Potential mechanical constraints may influence interception of leftward-moving targets.