Cerebral representations for egocentric space: Functional-anatomical evidence from caloric vestibular stimulation and neck vibration.

Détails

ID Serval
serval:BIB_D5F1930BA2BB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Cerebral representations for egocentric space: Functional-anatomical evidence from caloric vestibular stimulation and neck vibration.
Périodique
Brain
Auteur⸱e⸱s
Bottini G., Karnath H.O., Vallar G., Sterzi R., Frith C.D., Frackowiak R.S., Paulesu E.
ISSN
0006-8950 (Print)
ISSN-L
0006-8950
Statut éditorial
Publié
Date de publication
2001
Volume
124
Numéro
Pt 6
Pages
1182-1196
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
The internal representation of space involves the integration of different sensory inputs-visual, somatosensory/proprioceptive, vestibular-yielding reference frames which are not based on individual peripheral sensory codes, being organized instead in ego-centred (e.g. head, trunk, arm) and object- or environment-centred coordinates. Lateralized or direction-specific stimulation of peripheral sensory systems, such as caloric vestibular stimulation (CVS), posterior neck muscle mechanical vibration (NV) and optokinetic stimulation, can induce a distortion of egocentric coordinates, causing, for example, a deviation of the subjective straight ahead in pointing tasks. Appropriate forms of this stimulation can also temporarily improve a variety of pathological manifestations of unilateral neglect. We used PET measurements of regional cerebral blood flow changes in normal volunteers to measure the brain responses shared by CVS and NV. We show that somatosensory areas of the perisylvian cortex including the insula and retroinsular cortex, the temporoparietal junction and somatosensory area II receive signals from both sensory channels. We propose that these anatomical sites contribute to egocentric representation of space.
Mots-clé
Adult, Brain Mapping, Caloric Tests, Cerebral Cortex/anatomy & histology, Cerebral Cortex/metabolism, Cerebrovascular Circulation/physiology, Functional Laterality/physiology, Humans, Male, Neck Muscles/innervation, Neck Muscles/physiology, Nerve Net/anatomy & histology, Nerve Net/physiology, Physical Stimulation, Postural Balance/physiology, Proprioception/physiology, Psychomotor Performance/physiology, Space Perception/physiology, Tomography, Emission-Computed, Vestibule, Labyrinth/innervation, Vestibule, Labyrinth/physiology, Vibration
Pubmed
Web of science
Open Access
Oui
Création de la notice
12/09/2011 19:34
Dernière modification de la notice
20/08/2019 15:55
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