Digastric

Digastric is a muscle located in the anatomical region of the neck. It is named for its two parts, or 'bellies'. The digastric muscle plays a crucial role in various functions such as swallowing and speech.

Anatomy

The digastric muscle consists of two muscular 'bellies': the anterior belly and the posterior belly. These two bellies are connected by an intermediate tendon. The anterior belly is closer to the front of the neck, while the posterior belly is closer to the back.

Anterior Belly

The anterior belly of the digastric muscle originates from the digastric fossa of the mandible. It is a thin, flat muscle that extends from the lower jaw to the intermediate tendon.

Posterior Belly

The posterior belly of the digastric muscle originates from the mastoid notch of the temporal bone. It is larger and longer than the anterior belly, extending from the mastoid process of the temporal bone to the intermediate tendon.

Function

The digastric muscle assists in several functions, including:

• Lowering the mandible (opening the mouth)
• Elevating the hyoid bone during swallowing and speech
• Assisting in the lateral movement of the mandible

Clinical Significance

Dysfunction or injury to the digastric muscle can lead to conditions such as:

• Temporomandibular joint disorder (TMJ)
• Dysphagia (difficulty swallowing)
• Speech disorders

Treatment for these conditions may involve physical therapy, medication, or in severe cases, surgery.

See Also

• Muscles of the neck
• Anatomy of the neck
• Swallowing
• Speech production

Digastric Resources
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