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Titolo:
Two evoked responses with different recovery functions in the primary somatosensory cortex in humans
Autore:
Hoshiyama, M; Kakigi, R;
Indirizzi:
Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 i, Aichi 4448585, Japan
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 7, volume: 112, anno: 2001,
pagine: 1334 - 1342
SICI:
1388-2457(200107)112:7<1334:TERWDR>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-FIELDS; MEDIAN NERVE; SEP-R; POTENTIALS; STIMULATION; CORTICES;
Keywords:
recovery function; somatosensory evoked magnetic cortical field; sensory cortex; human; median nerve;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Hoshiyama, M Natl Inst Physiol Sci, Dept Integrat Physiol, Okazaki, Aichi 4448585, Japan Natl Inst Physiol Sci Okazaki Aichi Japan 4448585 585, Japan
Citazione:
M. Hoshiyama e R. Kakigi, "Two evoked responses with different recovery functions in the primary somatosensory cortex in humans", CLIN NEU, 112(7), 2001, pp. 1334-1342

Abstract

Objectives: We investigated the recovery function of somatosensory evoked magnetic cortical fields (SEFs) to confirm the temporal aspects of the somatosensory process in humans. Methods: SEFs were recorded following median nerve electrical stimulation in 6 healthy subjects. Double stimulation, with interstimulus intervals (ISIs) from 3 to 100 Ins, was applied, and the SEF components for the second stimulation were analyzed. In a supplementary experiment, responses to single stimulations of various intensities from the sensory threshold to the motor threshold were studied. Results: The first SEF component (1M) diminished when the ISI was less than 10 ms, while the second component (2M) remained even when the ISI was 3 ms. The two components showed a very similar attenuation with decrease of stimulus intensity. There was no significant difference in dipole location between 1M and 2M in the primary somatosensory cortex (SI). Conclusions: The results suggested that at least two independent pathways with different recovery functions exist in a similar area in the SI. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 02/06/20 alle ore 23:12:08