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Self-concept is the cognitive and emotional understanding individuals hold about their identity. It evolves through various developmental stages, beginning in infancy and maturing as children grow. This concept influences how individuals perceive their abilities, interact with others, and manage challenges throughout life.
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Somatosensory coding of visual self-identity.

Mattia Galigani1, Marcella Romeo2, Nicoletta Scanferlato1

  • 1Manibus Lab, Department of Psychology, University of Turin, Turin, Italy.

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|July 31, 2025
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Summary
This summary is machine-generated.

The brain uses the somatosensory system to recognize self-body identity, even from visual cues. This system shows distinct activity when processing tactile stimuli linked to one's own hand versus another's, aiding self-awareness.

Keywords:
Bodily self-identityEEGSelf-awarenessSomatosensory systemVisual-tactile associations

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Understanding bodily self-identity is crucial for self-awareness.
  • The somatosensory system's role in processing bodily identity, particularly through visual input, remains an area of investigation.

Purpose of the Study:

  • To investigate if the somatosensory system directly codes bodily self-identity when visual information is presented.
  • To explore the neural mechanisms underlying the processing of self- versus other-body visual cues.

Main Methods:

  • Three psychophysical experiments using tactile stimuli and self/other hand images to measure reaction times.
  • Two electrophysiological experiments to analyze neural activity in response to visual and tactile stimuli.

Main Results:

  • Participants exhibited faster reaction times to tactile stimuli when viewing images of their own hand compared to another person's hand.
  • Electrophysiological data revealed that primary and secondary somatosensory cortices showed significantly higher activity when tactile probes were associated with self-hand images versus other-hand images.
  • Visual cortex activity did not differ based on bodily identity.

Conclusions:

  • The somatosensory system plays a direct role in coding visual self-identity.
  • This coding likely results from associative learning, linking visual and somatosensory input to one's own body.
  • This mechanism may be a fundamental prerequisite for the development of self-awareness.