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Related Experiment Videos

Grasp representations depend on knowledge and attention.

Kao-Wei Chua1, Daniel N Bub2, Michael E J Masson2

  • 1Department of Psychology, Vanderbilt University.

Journal of Experimental Psychology. Learning, Memory, and Cognition
|September 22, 2017
PubMed
Summary
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Object recognition influences motor cortex activity and grasping actions. This study reveals a dual-route theory where both visual input and stored knowledge, like object familiarity, shape action plans for grasping.

Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Visual Perception

Background:

  • Visual object perception activates the motor cortex, influencing subsequent actions.
  • The precise nature of motor representations from object images remains unclear.
  • Action plans may rely on immediate visual data or prior experience.

Purpose of the Study:

  • To investigate the dual-route theory of action representations evoked by object images.
  • To determine how visual input and stored knowledge interact in action planning.
  • To explore the role of object familiarity and attention in grasping actions.

Main Methods:

  • Participants viewed images of objects.
  • Grasping actions were measured.
  • Object familiarity and attentional focus were manipulated.

Related Experiment Videos

  • Reaction times for grasping were analyzed.

    • Main Results:

    • Object familiarity significantly facilitated grasping actions.
    • Knowledge of object name or canonical orientation sped up grasping for familiar objects.
    • Attentional focus modulated the influence of visual input versus stored knowledge.

    Conclusions:

    • A dual-route model explains action representations from object images, integrating visual processing and memory.
    • Object familiarity and attention dynamically shape motor responses.
    • Grasping actions are influenced by an interplay between perception and prior experience.