Digastric fossa of Mandible

Digastric Fossa of Mandible is a specific anatomical feature located on the mandible, which is the lower jawbone in humans and many other animals. This fossa is a depression or hollowed-out area that serves as the attachment point for the digastric muscle, specifically its anterior belly. The digastric muscle plays a crucial role in the process of swallowing and speech by facilitating the lowering of the mandible and the elevation of the hyoid bone.

Anatomy

The digastric fossa is situated on the inner surface of the mandible, near the midline, but slightly to the side. It is located anteriorly, close to the base of the mandible's body, just below the area where the lower front teeth (incisors) are anchored. This location is strategic for the attachment of the anterior belly of the digastric muscle, which extends from this fossa to the hyoid bone, a horseshoe-shaped bone situated in the anterior neck.

Function

The primary function of the digastric fossa, in conjunction with the digastric muscle, is to facilitate mouth opening and the lowering of the mandible. This action is essential for various activities, including speaking, chewing, and swallowing. The digastric muscle, by attaching to the mandible at the digastric fossa, plays a pivotal role in these movements.

Clinical Significance

The digastric fossa, while a small anatomical feature, can be involved in certain medical conditions. For example, abnormalities or variations in the size or shape of the fossa could potentially affect the attachment or function of the digastric muscle, leading to difficulties with mouth opening or other mandibular movements. Additionally, the area around the digastric fossa may be examined in cases of trauma to the mandible or in surgical procedures involving the lower jaw.

Related Structures

• Mandible - The lower jawbone to which the digastric fossa belongs.
• Digastric Muscle - The muscle that attaches to the mandible at the digastric fossa.
• Hyoid Bone - The bone to which the other end of the digastric muscle attaches, facilitating its function in mandibular and hyoid movements.

See Also

• Mandibular symphysis
• Mylohyoid line
• Submandibular gland