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A fasciculation, or muscle twitch, is a spontaneous, involuntary muscle contraction and relaxation, involving fine muscle fibers. [1] They are common, with as many as 70% of people experiencing them. [1] They can be benign, or associated with more serious conditions. [1]
An individual's physical strength is determined by two factors: the cross-sectional area of muscle fibers recruited to generate force and the intensity of the recruitment. Individuals with a high proportion of type I slow twitch muscle fibers will be relatively weaker than a similar individual with a high proportion of type II fast twitch ...
Compression of a trigger point may elicit local tenderness, referred pain, or local twitch response. The local twitch response is not the same as a muscle spasm. This is because a muscle spasm refers to the entire muscle contracting whereas the local twitch response also refers to the entire muscle but only involves a small twitch, no contraction.
“The proportion of slow-twitch to fast-twitch muscle fibers in a particular muscle varies depending on the function of the muscle and the type of training in which an individual participates.
Rheobase is the lowest intensity with indefinite pulse duration which just stimulated muscles or nerves. [1] Chronaxie is dependent on the density of voltage-gated sodium channels in the cell, which affect that cell's excitability. Chronaxie varies across different types of tissue: fast-twitch muscles have a lower chronaxie, slow-twitch muscles ...
Fast twitch muscles include large muscle groups such as the upper thigh and upper arm muscles whereas slow twitch muscles include high endurance muscles such as those used for posture. However, despite their drastic differences in structure and function, studies have shown that these types of muscle show the same trends in plasticity as a ...
Muscle tissue treated with a non-depolarizing neuromuscular blocking agents will produce an indicative response in the form of a tetanic fade, a diminishing response to tetanic stimulation where the initial intensity will be the highest, and the following ones will show lower and lower strength of response. [1] [2]
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