A flat muscle of the scalp formed by two parts (frontalis and occipitalis) connected by a tendon, allowing movement of the scalp.
From Greek 'epi-' (upon) + 'kranion' (skull) + Latin masculine nominative '-us'. The anatomical name for the scalp's primary muscle.
The epicranius is one of the few muscles you can voluntarily flex even when relaxed—some people can wiggle their whole scalp back and forth, and it's because this single muscle spans from your eyebrows to the back of your head.
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