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Titolo:
Analyses of muscular activity, energy metabolism, and muscle fiber type composition in a patient with bilateral masseteric hypertrophy
Autore:
Satoh, K; Yamaguchi, T; Komatsu, K; Inoue, N; Minowa, K; Kanayama, T; Yoshida, S; Ohata, N;
Indirizzi:
Hokkaido Univ, Grad Sch Dent Med, Dept Oral Funct Sci, Kita Ku, Sapporo, Hokkaido 0608586, Japan Hokkaido Univ Sapporo Hokkaido Japan 0608586 oro, Hokkaido 0608586, Japan
Titolo Testata:
CRANIO-THE JOURNAL OF CRANIOMANDIBULAR PRACTICE
fascicolo: 4, volume: 19, anno: 2001,
pagine: 294 - 301
SICI:
0886-9634(200110)19:4<294:AOMAEM>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE SPECTROSCOPY; EXERCISE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Satoh, K Hokkaido Univ, Grad Sch Dent Med, Dept Oral Funct Sci, Kita Ku, N13 W7, Sapporo, Hokkaido 0608586, Japan Hokkaido Univ N13 W7 Sapporo Hokkaido Japan 0608586 608586, Japan
Citazione:
K. Satoh et al., "Analyses of muscular activity, energy metabolism, and muscle fiber type composition in a patient with bilateral masseteric hypertrophy", CRANIO, 19(4), 2001, pp. 294-301

Abstract

Hyperwork of the masseter muscles due to habitual parafunction is thought to induce masseteric hypertrophy (so called work hypertrophy). However, thecauses underlying this disease are not yet fully understood. Recently, we had a patient with bilateral masseteric hypertrophy, and we performed a partial excision of the masseter muscles. In this patient's case, we examined muscular activity, energy metabolism, and fiber type composition of the masseter muscles using electromyograms (EMG), P-31-magnetic resonance spectroscopy (MRS), and enzyme-histochemistry. The EMG showed no hyperactivity, andthe P-31-MRS showed normal energy spectral patterns and PCr contents of the masseter muscles. The fiber type composition, however, in the muscles in this case was very different from that in muscles with "work hypertrophy" and also that in normal masseter muscles: 1. Loss of type IIB fibers; 2. Increases in type IIA and in type IM & IIC fibers; and 3. Decrease in type I fibers. The findings suggest that this is not a case of work hypertrophy buta case of compensatory hypertrophy possibly due to a lack of high-tetanus-tension type IIB fibers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 19:12:36