The role of vision and proprioception in implicit and explicit self-movement recognition

Area of Science:

• Cognitive Neuroscience
• Body Self-Representation
• Action Recognition

Background:

• Body self-representation involves recognizing one's own body, with a self-advantage effect (better performance for self-related stimuli) often observed.
• This self-advantage is inconsistent across tasks, typically appearing in implicit recognition but not always in explicit recognition.
• Previous research on movement self-recognition lacks systematic comparison of implicit versus explicit tasks and the roles of vision and proprioception.

Purpose of the Study:

• To investigate if the self-advantage effect extends to recognizing one's own movements.
• To compare self-advantage in implicit versus explicit movement recognition tasks.
• To disentangle the contributions of visual and proprioceptive information in movement self-recognition.

Main Methods:

• Participants judged the direction of arm reaching movements (implicit task) or identified if movements were their own (explicit task).
• Movements were presented visually or via proprioceptive feedback using an exoskeleton.
• Both own and others' movements were used for comparison.

Main Results:

• A self-advantage was found in the implicit task for both visual and proprioceptive modalities, indicating better discrimination of own movements.
• In the explicit task, self-advantage was observed in the visual modality but not the proprioceptive modality.
• Individuals implicitly differentiate self-generated movement patterns across vision and proprioception.

Conclusions:

• Proprioceptive input plays a role in implicitly favoring self-action discrimination.
• Visual cues contribute to both implicit and explicit self-recognition of movements.
• The study highlights distinct roles for visual and proprioceptive feedback in motion self-recognition.