This passes anteriorly and medially to insert into the digastric fossa on the internal surface of the mandible.
Its unique morphology, structure, and variations have drawn genuine interest in this muscle from anatomists, scientists, and physicians for a long time, and the variations of the digastric muscle have been documented since the 18th century. On emergence from the apex of the sling, digastric becomes muscular once again as the anterior belly. The motor innervation of the single-bellied digastric muscle in the rabbit: A retrograde horseradish peroxidase study Baisden, Ronald H. The digastric muscle consists of the anterior belly and the posterior belly connecting the mandible, hyoid bone, and temporal bone.
#Anterior belly of digastric imuscle nnervation free
The tendon is separated from the inner surface of the sling by a synovial sheath that permits free movement. The tendon runs through a fibrous sling that is closely apposed and attached to the lesser horn of the hyoid bone. About a centimetre from the hyoid bone it becomes tendinous - the intermediate tendon. Most noted for the presence of several submental lymph. The anterior triangle of the neck can be further subdivided into: Submental Triangle: between the anterior belly of the digastric, superior to the hyoid bone, and the midline of the neck. A slender muscular slip, it passes anteriorly, inferiorly and medially. Origins, Insertions and Actions can be reviewed in the text. The digastric muscle is a skeletal muscle with two muscle bellies, which are connected by an intermediate tendon. The posterior belly arises from the mastoid notch on the medial side of the base of the mastoid process. Its name is derived from the Greek for 'two bellies', indicative of its division into two muscular sections - anterior and posterior - by an intermediate tendinous region. On each side of the neck, digastric is one of the suprahyoid muscles.
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