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Related Experiment Video

Updated: Jan 30, 2026

Task Interruption and Resumption Paradigm for Testing the Activation and Pursuit of an Abstract Thinking Goal
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Shared right-hemispheric representations of sensorimotor goals in dynamic task environments.

Ada Le1, Francis Benjamin Wall1, Gina Lin1

  • 1Department of Psychology, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada.

Experimental Brain Research
|January 30, 2019
PubMed
Summary

This study investigated grasp goals in dynamic environments. Results show that switching to bimanual grasping from right-hand grasping causes delays, suggesting sensorimotor grasp goals are represented at intermediate abstraction levels.

Keywords:
BimanualCoordinationGoal representationGraspMotorRepresentationsSensorimotorSwitch costs

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Control

Background:

  • Functional behavior involves integrating sensory information with motor actions to achieve goals, like grasping objects.
  • Dynamic environments require adapting motor actions to environmental changes while pursuing goals, unlike static scenarios.
  • Understanding sensorimotor grasp goal representation is crucial for explaining adaptive behavior.

Purpose of the Study:

  • To investigate how sensorimotor grasp goals are represented in dynamic environments.
  • To determine if grasp goal representations are lateralized, particularly in the dominant left hemisphere.
  • To explore the abstraction level of sensorimotor grasp goal representations.

Main Methods:

  • Participants were primed to grasp objects with either their right or left hand, with occasional switches to bimanual grasping.
  • Reaction times were measured during single-hand to bimanual grasping transitions.
  • Control experiments were conducted to rule out alternative explanations for observed effects.

Main Results:

  • Switching from right-hand to bimanual grasping significantly delayed reaction times.
  • Switching from left-hand to bimanual grasping did not result in significant delays.
  • Lateralized switch costs were not attributable to asymmetric inhibition or task novelty.

Conclusions:

  • The left hemisphere does not universally represent sensorimotor grasp goals.
  • Sensorimotor grasp goals are represented at intermediate abstraction levels, separate from cognitive task control and effector control.
  • This finding advances our understanding of the neural basis of goal-directed motor behavior in complex environments.