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Titolo:
Dermatome versus homunculus; detailed topography of the primary somatosensory cortex following trunk stimulation
Autore:
Itomi, K; Kakigi, R; Maeda, K; Hoshiyama, M;
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 Konan Univ, Dept Informat & Management Sci, Kobe, Hyogo 658, Japan Konan Univ Kobe Hyogo Japan 658 & Management Sci, Kobe, Hyogo 658, 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:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 3, volume: 111, anno: 2000,
pagine: 405 - 412
SICI:
1388-2457(200003)111:3<405:DVHDTO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; TIBIAL NERVE-STIMULATION; THORACIC OUTLET SYNDROME; HUMAN-BRAIN; CYTOARCHITECTONIC AREAS; FUNCTIONAL-ORGANIZATION; LOCALIZATION ACCURACY; SENSORIMOTOR CORTEX; CONSCIOUS MONKEY; RECEPTIVE-FIELDS;
Keywords:
magnetoencephalography; somatosensory evoked magnetic field; somatosensory stimulation; trunk; homunculus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Itomi, K Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 4448585, Japan
Citazione:
K. Itomi et al., "Dermatome versus homunculus; detailed topography of the primary somatosensory cortex following trunk stimulation", CLIN NEU, 111(3), 2000, pp. 405-412

Abstract

Objective: Identification of a detailed topography of the receptive area for each of the thoracic dermatomes in humans using somatosensory evoked magnetic fields (SEF). Methods: We analyzed the location of the equivalent current dipole (ECD) of SEF following electrical stimulation of the skin at Th4, Th6, Th8, Th10 and Th12 dermatomes in 14 normal subjects. Results: Three deflections, M18, M25 and M40, were obtained within 60 ms of stimulation of Th6, Th8 and Th10 dermatomes. No consistent deflection could be identified following Th4 and Th12 dermatomal stimulation, probably due to a poor signal-to-noise ratio and difficulty in fixing the stimulation electrodes. Mis was absent or small in amplitude. The latency of M25 rangedfrom short to long in the order Th6, Th8 and Th10 (P < 0.05). ECDs of all components for each site stimulation were located in the truncal area of the primary somatosensory cortex. Although the locations of the ECDs tend to be arranged from lateral to medial in the sequence Th6, Th8 and Th10, the difference was not significant. Conclusion: The representation area of the trunk is small, and the receptive areas for the stimulation of Th6, Th8 and Th10 dermatomes are consideredto be very close or to overlap. (C) 2000 Elsevier Science Ireland Ltd. Allrights reserved.

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Documento generato il 23/10/20 alle ore 14:17:38