absent insertional activity

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Published 2018-09-18

compartment syndrome, right tibialis anterior. Some 50 Hz artefact. Not the greatest recording - no sound. Abrupt movements of the baseline are from needle being moved within the muscle looking for spontaneous activity, or any activity at all. If needle is definitely in muscle tissue then absence of insertional activity indicates death of muscle fibres. In this case secondary to ischaemia from compartment syndrome. Loss of insertional activity also occurs in end-stage myopathy as muscle is replaced by fatty and connective tissue.

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