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Titolo:
SOMATOSENSORY HOMUNCULUS AS DRAWN BY MEG
Autore:
NAKAMURA A; YAMADA T; GOTO A; KATO T; ITO K; ABE Y; KACHI T; KAKIGI R;
Indirizzi:
NATL INST LONGEV SCI,DEPT BIOFUNCT RES,36-3 GENGO,MORIOKA CHO AICHI 474 JAPAN CHUBU NATL HOSP,DEPT NEUROL AICHI 474 JAPAN NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN
Titolo Testata:
NeuroImage
fascicolo: 4, volume: 7, anno: 1998,
parte:, 1
pagine: 377 - 386
SICI:
1053-8119(1998)7:4<377:SHADBM>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; POSTERIOR TIBIAL NERVE; LARGE-ARRAY BIOMAGNETOMETER; MEDIAN NERVE; HUMAN-BRAIN; FINGER REPRESENTATION; SENSORIMOTOR CORTEX; SCALP TOPOGRAPHY; STIMULUS SIDE; STIMULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
A. Nakamura et al., "SOMATOSENSORY HOMUNCULUS AS DRAWN BY MEG", NeuroImage, 7(4), 1998, pp. 377-386

Abstract

We studied a detailed somatosensory representation map of the human primary somatosensory cortex using magnetoencephalography. Somatosensory-evoked magnetic fields following tactile stimulation of multiple points in the right hemibody (including the tongue, lips, fingers, arm, trunk, leg, and foot) were analyzed in five normal subjects. We were able to estimate equivalent current dipoles (ECDs) following stimulationof the tongue, lips, fingers, palm, forearm, elbow, upper arm, and toes in most subjects and those following the stimulation of the chest, ankle, and thigh in one subject. The ECDs were located in the postcentral gyrus and generally arranged in order along the central sulcus, which is compatible with the somatosensory ''homunculus. '' Linear distances, averaged in five subjects, from the receptive area of the thumb to that of the tongue, little finger, forearm, upper arm, and toes wereestimated to be 2.42 +/- 0.28, 1.25 +/- 0.28, 2.21 +/- 0.72, 2.75 +/-0.63, and 5.29 +/- 0.48 cm, respectively. The moment of each ECD, which suggested the size of the cortical areas responsive to the stimulation, was also compatible with the bizarre proportion of the homunculuswith a large tongue, lips, and fingers. According to these results, we were able to reproduce a large part of the somatosensory homunculus quantitatively on an individual brain MRI. (C) 1998 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 06:28:19