Digastric muscle

Digastric Muscle

The Digastric Muscle (pronounced: di-gas-trik mus-kul) is a small muscle located in the lower part of the human head, beneath the mandible. The term "digastric" is derived from the Greek words "di," meaning "double," and "gaster," meaning "belly." This muscle is so named because it has two 'bellies' separated by a central tendon.

Anatomy

The Digastric Muscle consists of two parts, or 'bellies.' The anterior belly extends from the mandibular symphysis and the posterior belly extends from the mastoid process of the temporal bone, with both bellies meeting at an intermediate tendon.

Function

The Digastric Muscle plays a crucial role in several functions, including opening the mouth, swallowing, and speech. It assists in depressing the mandible (lowering the jaw) and elevating the hyoid bone.

Clinical Significance

Abnormalities or injuries to the Digastric Muscle can lead to conditions such as dysphagia (difficulty swallowing) and temporomandibular joint disorder (TMJ).

Related Terms

Mandible: The lower jawbone in mammals.
Mastoid Process: The rounded projection of the temporal bone behind the ear.
Temporal Bone: One of the two bones that form the sides and base of the skull.
Hyoid Bone: A horseshoe-shaped bone situated in the anterior midline of the neck.
Dysphagia: Difficulty or discomfort in swallowing.
Temporomandibular Joint Disorder: A condition affecting the joint that connects the lower jaw to the skull.