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digastric (muscle)



  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;

Synonym(s): musculus biventerTA, musculus digastricusTA, two-bellied muscleTA, biventer mandibulae, musculus biventer mandibulae

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.