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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
Published on: August 1, 2018
Viewing objects and planning actions: on the potentiation of grasping behaviours by visual objects
Stergios Makris1, Aviad A Hadar, Kielan Yarrow
1Department of Psychology, City University, London, United Kingdom. stergios.makris.1@city.ac.uk
Brain and Cognition
|September 10, 2011
Summary
Humans automatically generate motor plans when viewing objects, influencing actions like grasping. This effect is rapid and temporary, supporting the affordances hypothesis in tool interaction.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human-Computer Interaction
Background:
- The affordances hypothesis suggests visual perception of objects directly informs potential actions.
- This implies that objects can trigger motor responses even without conscious intent.
Purpose of the Study:
- To investigate the temporal dynamics of motor plans activated by common objects.
- To determine if object properties automatically elicit specific motor responses.
Main Methods:
- Participants viewed objects with varying action significance (e.g., pinching, grasping).
- Two tasks were used: a reaction-time task with grip apparatus and transcranial magnetic stimulation (TMS) with motor evoked potential (MEP) recording.
- MEPs were measured from hand muscles associated with precision and power grips.
Main Results:
- Data revealed an interaction between object type and motor response type.
- Reaction times and MEPs indicated the rapid generation of congruent motor plans upon object presentation.
- The influence of object affordances on motor planning was found to be quick and transient.
Conclusions:
- Object properties rapidly and automatically activate specific motor codes.
- This automatic motor activation is a fast, short-lived phenomenon.
- Findings support the direct link between visual object perception and motor system activation.
