Synergist coactivation and substitution pattern of the human masseter and temporalis muscles during sustained static contractions
نویسندگان
چکیده
منابع مشابه
Synergist coactivation and substitution pattern of the human masseter and temporalis muscles during sustained static contractions.
OBJECTIVE Previous reports indicated that between-muscle substitution of active motor unit pools can be found in a variety of synergist muscles, including shoulder and leg muscles, but little information is available for the masticatory muscles. We hypothesized that, during a prolonged clenching effort performed at low- to moderate-bite force levels, a substitution pattern of activity can be fo...
متن کامل[Motor unit activities of human masseter muscle during sustained voluntary contractions].
The purpose of this paper is to investigate the motor unit activities of the human masseter muscle during sustained the bite force at a constant level. The electrical activities recorded with surface and inserted electrodes were studied, with the following results. 1. The masseter muscle had the changes of activities in two phases as a contraction progressed. 2. In the first phase, surface EMG ...
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The histochemical characteristics, cross-sectional area and capillary of the skeletal muscle fibers of the anterior and posterior regions of the superficial masseter and the temporalis muscles are described for juvenile and adult rhesus monkeys of both sexes. Slow twitch fatigue resistant (S), fast twitch fatigue resistant (FR) and fast twitch fatigable (FF) fibers were found in varying proport...
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Histochemical properties, muscle fiber cross-sectional area, muscle fiber length, and the oxidative capacity of masticatory muscles of female rhesus monkeys were assessed following alteration in functional length by an intraoral appliance or by detachment of the muscle. Experimental groups received the appliance only (A); the appliance and subsequent detachment of the masseter (AD); the applian...
متن کاملHistochemistry of fibres of masseter and temporalis muscles of edentulous monkeys Macaca mulatta.
Muscle fibres of the masseter and temporalis muscles of female rhesus monkeys which had been edentulous for 4.5 yr were analysed histochemically. Fibres were classified on the basis of activities of succinic acid dehydrogenase and myofibrillar adenosine triphosphatase. Capillaries were visualized by phosphatase activity. Succinate oxidase activity was determined by differential respirometry of ...
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ژورنال
عنوان ژورنال: Clinical Neurophysiology
سال: 2009
ISSN: 1388-2457
DOI: 10.1016/j.clinph.2008.10.004