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Anterior belly of digastric

The anterior belly of the digastric (latin: venter anterior musculi digastrici) is one of the two bellies of the digastric muscle. The anterior belly is smaller than the posterior belly, and it develops from the first pharyngeal arch.

Origin

The anterior belly of the digastric originates from the digastric fossa on the inner surface of the mandible.

Insertion

From the origin site the anterior belly of the digastric passes downward and backward, and inserts or turns into the intermediate tendon, which attaches to the hyoid bone.

Action

Upon contraction the anterior belly of the digastric muscle elevates the hyoid bone.

Innervation

The anterior belly of the digastric is innervated by the mylohyoid nerve, which arises from the mandibular division of the trigeminal nerve (CN V3).