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Titolo:
Quantitative EMG analysis to investigate synergistic coactivation of ankleand knee muscles during isokinetic ankle movement. Part 1: time amplitude analysis
Autore:
Hwang, IS; Abraham, LD;
Indirizzi:
Natl Cheng Kung Univ, Dept Phys Therapy, Tainan 701, Taiwan Natl Cheng Kung Univ Tainan Taiwan 701 Phys Therapy, Tainan 701, Taiwan Univ Texas, Dept Kinesiol & Hlth Educ, Austin, TX 78712 USA Univ Texas Austin TX USA 78712 Kinesiol & Hlth Educ, Austin, TX 78712 USA Univ Texas, Biomed Engn Grad Program, Austin, TX 78712 USA Univ Texas Austin TX USA 78712 ed Engn Grad Program, Austin, TX 78712 USA Univ Texas, Grad Program Neurosci, Austin, TX 78712 USA Univ Texas AustinTX USA 78712 rad Program Neurosci, Austin, TX 78712 USA
Titolo Testata:
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
fascicolo: 5, volume: 11, anno: 2001,
pagine: 319 - 325
SICI:
1050-6411(200110)11:5<319:QEATIS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIRROR MOVEMENTS; MOTOR OVERFLOW; CHILDREN; ADULTS; ASYMMETRIES; CORTEX;
Keywords:
motor irradiation; electromyography; isokinetic ankle contraction; synergy; coactivation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Hwang, IS Natl Cheng Kung Univ, Dept Phys Therapy, Tainan 701, Taiwan NatlCheng Kung Univ Tainan Taiwan 701 apy, Tainan 701, Taiwan
Citazione:
I.S. Hwang e L.D. Abraham, "Quantitative EMG analysis to investigate synergistic coactivation of ankleand knee muscles during isokinetic ankle movement. Part 1: time amplitude analysis", J ELECTROMY, 11(5), 2001, pp. 319-325

Abstract

Synergy generally refers to the coordinated action of several motor elements to produce a specific motor task, either intentionally or automatically. One example is motor irradiation, a sudden spread of synergistic muscular coactivation resulting from a forceful single joint movement. To investigate this type of synergy pattern, a quantitative EMG approach was employed tocharacterize explicit neuromuscular synergy in the ankle-knee complex during maximal ankle isokinetic contraction. In the present study, isokinetic ankle contractions, both dorsiflexion and plantarflexion, at four different speeds (30, 60, 120, and 240 degrees /s) were studied in a normal adult population (N=11) to assess synergistic coactivation of the prime movers (tibialis anterior and gastrocnemius) and irradiated muscles (ipsilateral and contralateral rectus femoris and biceps femoris) of the ankle-knee complex. Electromyographic signals were collected with surface EMG electrodes and processed with traditional time-amplitude analysis to examine specific neural control strategies. The data generally supported several empirical assumptions common to neurological facilitation techniques. (1) Motor irradiation to the knee muscles due to ankle muscle isokinetic contraction was strongly directionally dependent. (2) Motor irradiation to the ipsilateral knee muscles due to ankle isokinetic contraction was speed dependent. (3) The prime movers demonstrated a similar control strategy, irrespective of different contraction speeds. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 20/01/20 alle ore 22:02:20