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Cortical Areas Activated by Bilateral Galvanic Vestibular Stimulation
Author(s) -
LOBEL ELIE,
KLEINE JUSTUS F.,
LEROYWILLIG ANNE,
MOORTELE PIERREFRANÇOIS,
BIHAN DENIS LE,
GRÜSSER OTTOJOACHIM,
BERTHOZ ALAIN
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09194.x
Subject(s) - neuroscience , vestibular system , intraparietal sulcus , macaque , temporoparietal junction , stimulation , functional magnetic resonance imaging , galvanic vestibular stimulation , superior temporal sulcus , premotor cortex , psychology , anatomy , medicine , prefrontal cortex , cognition , dorsum
A bstract : The brain areas activated by bilateral galvanic vestibular stimulation (GVS) were studied using functional magnetic resonance imaging. In six human volunteers, GVS led to activation in the region of the temporoparietal junction, the central sulcus, and the anterior interior intraparietal sulcus, which may correspond to macaque areas PIVC, 3aV, and 2v, respectively. In addition, activation was found in premotor regions of the frontal lobe, presumably analogous to areas 6pa and 8a in the monkey. Since these areas were not detected in previous studies using caloric vestibular stimulation, they could be related to the modulation of otolith afferent activity by GVS. However, the simple paradigm used did not allow separation of the otolithic and semicircular canal effects of GVS. Further studies must be performed to clarify the question of cortical representation of the otolithic information in the human and monkey brain.