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Titolo:
Lower excitability of the corticospinal tract to transcranial magnetic stimulation during lengthening contractions in human elbow flexors
Autore:
Sekiguchi, H; Kimura, T; Yamanaka, K; Nakazawa, K;
Indirizzi:
Natl Rehabil Ctr Disabled, Res Inst, Motor Dysfunct Div, Tokorozawa, Saitama 3598555, Japan Natl Rehabil Ctr Disabled Tokorozawa Saitama Japan 3598555 3598555, Japan
Titolo Testata:
NEUROSCIENCE LETTERS
fascicolo: 2, volume: 312, anno: 2001,
pagine: 83 - 86
SICI:
0304-3940(20011019)312:2<83:LEOTCT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MUSCLE;
Keywords:
lengthening contraction; input-output property; corticospinal tract; transcranial magnetic stimulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Sekiguchi, H Natl Rehabil Ctr Disabled, Res Inst, Motor Dysfunct Div, 4-1 Namiki, Tokorozawa, Saitama 3598555, Japan Natl Rehabil Ctr Disabled 4-1 Namiki Tokorozawa Saitama Japan 3598555
Citazione:
H. Sekiguchi et al., "Lower excitability of the corticospinal tract to transcranial magnetic stimulation during lengthening contractions in human elbow flexors", NEUROSCI L, 312(2), 2001, pp. 83-86

Abstract

The purpose of this study was to characterize the neuromuscular control during shortening (SHO) and lengthening (LEN) contractions by investigating the input-output (I/O) property in the corticospinal tract. To this end, therelation between various stimulus intensities applied via transcranial magnetic stimulation and the size of motor evoked potentials was investigated in six healthy subjects during elbow flexion and extension. The measured I/O property demonstrates a sigmoidal shape, and is characterized by a plateau value, maximum slope and threshold. The results demonstrated that both the plateau value and maximum slope were significantly lower during LEN contraction than during SHO contraction (P < 0.05), whereas the threshold was found not to be significantly different. These results suggest that both the maximum excitation level and the gain of the corticospinal tract are reduced during LEN contractions. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 02:17:47