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Updated: Feb 21, 2026
07:08
Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
Published on: August 1, 2018
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Unaware Processing of Tools in the Neural System for Object-Directed Action Representation.
Marco Tettamanti1, Francesca Conca2, Andrea Falini3,2
1Division of Neuroscience and tettamanti.marco@hsr.it.
Summary
The brain processes visual information about objects and their potential actions, even when we are not consciously aware of them. This unconscious visuomotor encoding is independent of conscious perception, aiding in rapid responses.
Area of Science:
- Neuroscience
- Cognitive Science
- Perception
Background:
- The brain's processing of manipulable objects and their affordances is debated.
- Evidence for unconscious visuomotor coding of object appearance is lacking.
Purpose of the Study:
- To investigate if the brain activates visuomotor representations for manipulable objects without conscious awareness.
- To determine if subliminal object perception engages the action representation system.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used in 24 healthy participants.
- Continuous flash suppression (CFS) created unaware visual perception conditions.
- Multivariate searchlight analysis examined brain activation patterns.
Main Results:
- Manipulable objects activated visuomotor cortices (premotor, parietal, temporal) regardless of awareness.
- Brain activation patterns decoded object manipulability even under subliminal conditions.
- Consistent activation was observed for both perceived and unperceived manipulable objects.
Conclusions:
- Visual perception and motor representation are intimately coupled for object processing.
- The visuomotor system constitutively encodes manipulable objects independent of awareness.
- This unconscious coupling facilitates efficient stimulus monitoring and reaction planning.
Keywords:
action representationawarenesscontinuous flash suppressionfunctional magnetic resonance imagingobject manipulationtoolsMore Related Videos
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