Toward understanding the neurophysiological basis of peripersonal space: An EEG study on healthy individuals

Antonino Naro, Rocco Salvatore Calabrò, Gianluca La Rosa, Veronica Agata Andronaco, Luana Billeri, Paola Lauria, Alessia Bramanti, Placido Bramanti

Research output: Contribution to journalArticle

Abstract

The subcortical mechanisms subtending the sensorimotor processes related to the peripersonal space (PPS) have been well characterized, whereas less evidence is available concerning the cortical mechanisms. We investigated the theta, alpha and beta event-related spectral perturbations (ERSP) while holding the forearm in different positions into the PPS of the face. Fifty healthy individuals were subjected to EEG recording while being provided with median nerve electric stimulation at the wrist of the right hand held at different hand-to-face distances. Theta and beta rhythms were significantly perturbed depending on the hand-to-face distance, whereas alpha oscillations reflected a more general, non-specific oscillatory response to the motor task. The perturbation of theta and beta frequency bands may reflect the processes of top-down modulation overseeing the conscious spatiotemporal encoding of sensory-motor information within the PPS. In other words, such perturbation reflects the continuous update of the conscious internal representations of the PPS to build up a purposeful and reflexive motor response.

Original languageEnglish
Article numbere0218675
JournalPLoS One
Volume14
Issue number6
DOIs
Publication statusPublished - Jun 2019

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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