BIOL 1020U Study Guide - Midterm Guide: Electromyography, Motor Unit, Triceps Brachii Muscle
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Exercise 1: voluntary contraction: unlike the discrete waveform from an electrocardiogram, the electromyogram waveform is irregular. The measured output creates waveforms that are irregular compared to those of electrocardiograms. Muscles also have different motor units that work at different times and intensities making the waveforms look different than those of an electrocardiogram. (reilly and lee 443-457) Based on the data you collected what can you infer is happening to the muscles as weight is added? (2) In order to compensate for the increase in load, the muscle neurons innervate both small and large motor units, in the end resulting in a constant lift. (reilly and lee 443-457) What are some explanations you can come up with for this phenomenon? (2) Coactivation is the process by which there is an antagonist response. The easiest way to think of coactivation is th(cid:396)ough ne(cid:449)ton s thi(cid:396)d la(cid:449), (cid:449)he(cid:396)e fo(cid:396) e(cid:448)e(cid:396)y (cid:396)eaction the(cid:396)e is an opposite, e(cid:395)ual action.
