digastric (muscle)

Type:Term

Definitions
1. one of the suprahyoid group of muscles consisting of two bellies united by a central tendon that passes through a fascial loop connected to the body of the hyoid bone; origin, by posterior belly from the digastric groove medial to the mastoid process; insertion, by anterior belly into lower border of mandible near midline; action, elevates the hyoid when mandible is fixed; depresses the mandible when hyoid is fixed; nerve supply, posterior belly from facial, anterior belly by nerve to the mylohyoid from the mandibular division of trigeminal;
2. a muscle with two fleshy bellies separated by a fibrous insertion;

Synonyms
musculus biventer , musculus digastricus , two-bellied muscle , biventer mandibulae , musculus biventer mandibulae

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