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Titolo:
A unique area of the homonculus: The topography of the primary somatosensory cortex in humans following posterior scalp and shoulder stimulation
Autore:
Itomi, K; Kakigi, R; Hoshiyama, M; Watanabe, K;
Indirizzi:
Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 i, Aichi 4448585, Japan Nagoya Univ, Sch Med, Dept Pediat, Nagoya, Aichi 466, Japan Nagoya Univ Nagoya Aichi Japan 466 Dept Pediat, Nagoya, Aichi 466, Japan Nagoya Univ, Fac Med, Dept Hlth Sci, Nagoya, Aichi 466, Japan Nagoya UnivNagoya Aichi Japan 466 ept Hlth Sci, Nagoya, Aichi 466, Japan
Titolo Testata:
BRAIN TOPOGRAPHY
fascicolo: 1, volume: 14, anno: 2001,
pagine: 15 - 23
SICI:
0896-0267(200123)14:1<15:AUAOTH>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; HUMAN SENSORIMOTOR CORTEX; MEDIAN NERVE-STIMULATION; ELECTRICAL-STIMULATION; TIBIAL NERVE; HUMAN HAND; CYTOARCHITECTONIC AREAS; LOCALIZATION ACCURACY; POTENTIALS; HOMUNCULUS;
Keywords:
magnetoencephalography; MEG; SEF; homunculus; shoulder; face; posterior scalp;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Kakigi, R Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 448585, Japan
Citazione:
K. Itomi et al., "A unique area of the homonculus: The topography of the primary somatosensory cortex in humans following posterior scalp and shoulder stimulation", BRAIN TOPOG, 14(1), 2001, pp. 15-23

Abstract

We recorded somatosensory evoked magnetic field (SEF) to investigate the differentiation in the receptive area for the face, lower part of the posterior scalp (mastoid) and shoulder, which occupy an unique area in the homunculus. We analyzed the location of the equivalent current dipole (ECD) of SEF following electrical stimulation of the skin at the face, mastoid and shoulder in 20 normal subjects. Three deflections (1M, 2M and 3M) were obtained within 50 ms of the stimulation in 16 of 20 subjects. The peak latency ofthe 1M and 2M was not significantly different at any stimulus sites. The amplitude of the 1M was significantly larger following the face than mastoidstimulation (p < 0.05). The 16 subjects were classified according to the locations of the ECD on stimulation of the mastoid: close to that for shoulder stimulation, but significantly (p < 0.05) more superior and medial to that following the face stimulation (Type 1, eleven subjects); close to that for face stimulation, but significantly (P < 0.05) more inferior and lateral to that following the shoulder stimulation (Type 2, five subjects). The site of the receptive area for the posterior scalp shows interindividual variation, possibly due to anatomical differences.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/10/20 alle ore 10:46:08