Motor Units

Muscle force regulation

Passive and active mechanisms determine the net, muscle force.  The latter is associated with the number of muscle fibers excited, and thus motor units recruited, and the rate at which muscle fibers are excited.  The first three slides provide an approximate...

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EMG and innervation of external anal sphincter

Innervation zones, where end-plates distribute within striated muscles, can be identified with arrays of electrodes.  For this to be possible, electrodes and muscle fibres must reside in parallel planes.  Innervation zones are identified where two, consecutive action...

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