Cortical facilitation of tactile afferents during the preparation of a body weight transfer when standing on a biomimetic surface - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Frontiers in Neurology Année : 2023

Cortical facilitation of tactile afferents during the preparation of a body weight transfer when standing on a biomimetic surface

Résumé

Self-generated movement shapes tactile perception, but few studies have investigated the brain mechanisms involved in the processing of the mechanical signals related to the static and transient skin deformations generated by forces and pressures exerted between the foot skin and the standing surface. We recently found that standing on a biomimetic surface (i.e., inspired by the characteristics of mechanoreceptors and skin dermatoglyphics), that magnified skin–surface interaction, increased the sensory flow to the somatosensory cortex and improved balance control compared to standing on control (e.g., smooth) surfaces. In this study, we tested whether the well-known sensory suppression that occurs during movements is alleviated when the tactile afferent signal becomes relevant with the use of a biomimetic surface. Eyes-closed participants (n = 25) self-stimulated their foot cutaneous receptors by shifting their body weight toward one of their legs while standing on either a biomimetic or a control (smooth) surface. In a control task, similar forces were exerted on the surfaces (i.e., similar skin–surface interaction) by passive translations of the surfaces. Sensory gating was assessed by measuring the amplitude of the somatosensory-evoked potential over the vertex (SEP, recorded by EEG). Significantly larger and shorter SEPs were found when participants stood on the biomimetic surface. This was observed whether the forces exerted on the surface were self-generated or passively generated. Contrary to our prediction, we found that the sensory attenuation related to the self-generated movement did not significantly differ between the biomimetic and control surfaces. However, we observed an increase in gamma activity (30–50 Hz) over centroparietal regions during the preparation phase of the weight shift only when participants stood on the biomimetic surface. This result might suggest that gamma-band oscillations play an important functional role in processing behaviorally relevant stimuli during the early stages of body weight transfer.
Fichier principal
Vignette du fichier
2023 Front Neurology (CHLOE SUTTER).pdf (1.04 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04132631 , version 1 (19-06-2023)

Identifiants

Citer

Chloé Sutter, Alix Moinon, Livia Felicetti, Francesco Massi, Jean Blouin, et al.. Cortical facilitation of tactile afferents during the preparation of a body weight transfer when standing on a biomimetic surface. Frontiers in Neurology, 2023, 14, pp.1175667. ⟨10.3389/fneur.2023.1175667⟩. ⟨hal-04132631⟩

Collections

CNRS UNIV-AMU
26 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More