Where is the digastric fossa?
mandible
The digastric fossa of the mandible is an anatomical region which occupies a space on the inner surface of the inferior border of the body of the mandible, near the midline bilaterally. It is a position of attachment of the anterior belly of the digastric muscle.
What does the digastric do?
The digastric muscle functions during swallowing, chewing, and speech. The anterior belly of the digastric is one of the three suprahyoid muscles which stabilizes the hyoid during swallowing, an action critical in protecting the airway while eating.
What does the digastric muscle attach to?
Digastric muscle
| Origin | Anterior belly: digastric fossa of mandible Posterior belly: mastoid notch of temporal bone |
|---|---|
| Insertion | Body of hyoid bone (via intermediate tendon and its fibrous sling) |
| Action | Depresses mandible Elevates hyoid bone during chewing, swallowing |
Why is it called Digastric?
The digastric muscle is a small muscle located in the neck, just below the lower jaw. The name comes from the fact that this muscle has two different muscle bellies, anterior belly and posterior belly, that are joined together by a tendon. ”Di-” means ”two,” while ”-gastric” refers to the stomach or belly.
Where does the Digastric originate?
The digastric muscle stretches between the mastoid process of the cranium to the mandible at the chin, and part-way between, it becomes a tendon which passes through a tendinous pulley attached to the hyoid bone. It originates from the second pharyngeal arch.
Where does the digastric originate?
Why is it called digastric?
What is unusual about the digastric muscle?
The two bellies of the digastric muscle have different embryological origins, and are supplied by different cranial nerves. The posterior belly, longer than the anterior belly, arises from the mastoid notch which is on the inferior surface of the skull, medial to the mastoid process of the temporal bone.
What type of tissue is digastric?
this new muscle by the digastric, which is a compound muscle made up of parts of the constrictors of the first and second branchial arches. Thus, it is partly innervated by the mandibular division of the fifth cranial nerve (as is the case with other jaw muscles and the tensor…
