Titre
Stroking or Buzzing? A Comparison of Somatosensory Touch Stimuli Using 7 Tesla fMRI.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
van der Zwaag, W.
Auteure/Auteur
Gruetter, R.
Auteure/Auteur
Martuzzi, R.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1932-6203
Statut éditorial
Publié
Date de publication
2015
Volume
10
Numéro
8
Première page
e0134610
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Publication Status: epublish
Résumé
Studying body representations in the brain helps us to understand how we humans relate to our own bodies. The in vivo mapping of the somatosensory cortex, where these representations are found, is greatly facilitated by the high spatial resolution and high sensitivity to brain activation available at ultra-high field. In this study, the use of different stimulus types for somatotopic mapping of the digits at ultra-high field, specifically manual stroking and mechanical stimulation, was compared in terms of sensitivity and specificity of the brain responses. Larger positive responses in digit regions of interest were found for manual stroking than for mechanical stimulation, both in terms of average and maximum t-value and in terms of number of voxels with significant responses to the tactile stimulation. Responses to manual stroking were higher throughout the entire post-central sulcus, but the difference was especially large on its posterior wall, i.e. in Brodmann area 2. During mechanical stimulation, cross-digit responses were more negative than during manual stroking, possibly caused by a faster habituation to the stimulus. These differences indicate that manual stroking is a highly suitable stimulus for fast somatotopic mapping procedures, especially if Brodmann area 2 is of interest.
PID Serval
serval:BIB_229C30AC76E5
PMID
Open Access
Oui
Date de création
2015-09-15T15:36:14.652Z
Date de création dans IRIS
2025-05-20T14:51:48Z
Fichier(s)![Vignette d'image]()
En cours de chargement...
Nom
26285027_BIB_229C30AC76E5.pdf
Version du manuscrit
published
Taille
6.67 MB
Format
Adobe PDF
PID Serval
serval:BIB_229C30AC76E5.P001
URN
urn:nbn:ch:serval-BIB_229C30AC76E56
Somme de contrôle
(MD5):777ecb65008efcb9ad9f749e67119e17