What muscle depresses the larynx and hyoid?
What muscle depresses the larynx and hyoid?
Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx. The omohyoid, sternohyoid, and thyrohyoid act to depress the hyoid bone. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.
What muscle depresses the hyoid?
Thyrohyoid. The thyrohyoid is a short band of muscle, thought to be a continuation of the sternothyroid muscle. Attachments: Arises from the thyroid cartilage of the larynx, and ascends to attach to the hyoid bone. Actions: Depresses the hyoid.
What depresses and fixes hyoid during opening of mouth?
The posterior suprahyoids and the infrahyoids are also classically regarded1,2 as acting to “stabilise”1 or “fix”2 the hyoid so that the anterior suprahyoids, and particularly the anterior belly of digastric6,7, can pull the symphyseal region of the jaw towards the hyoid and open the mouth.
What muscle elevate hyoid and depress the mandible?
mylohyoid
The mylohyoid mainly functions to elevate the hyoid bone, elevate the oral cavity, and depress the mandible. The source of motor innervation is via the mylohyoid nerve, which is a division of the inferior alveolar nerve, a branch of the mandibular division of the trigeminal nerve.
Which muscle originates on the sternum and clavicle?
sternocleidomastoid muscle
Structure. The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. It travels obliquely across the side of the neck and inserts at the mastoid process of the temporal bone of the skull by a thin aponeurosis.
What muscle depresses the larynx?
As a general rule, the suprahyoid muscles and the stylopharyngeus elevate the larynx, whilst the infrahyoid muscles depress the larynx.
What does it mean to depress the hyoid bone?
infrahyoid muscles
The hyoid bone demarcates these muscles into a superior group and an inferior group. Contraction of the suprahyoid muscles will elevate the hyoid bone while contraction of the infrahyoid muscles will depress the hyoid bone. These muscles contract in the different phases of speaking, chewing, and swallowing.
Which muscle depresses the hyoid and has an origin on the scapula?
Omohyoid muscle
| Origin | Inferior belly: superior border of scapula near the suprascapular notch Superior belly: intermediate tendon |
|---|---|
| Insertion | Inferior belly: intermediate tendon Superior belly: body of hyoid bone |
| Action | Depresses and retracts hyoid and larynx Tenses carotid sheath |
Which muscle is responsible for the elevation of the larynx and depression of the hyoid bone?
suprahyoid muscles
The suprahyoid muscles attach the larynx to the hyoid bone and elevate the larynx. These muscles are the stylohyoid, geniohyoid, mylohyoid, thyrohyoid, digastric, and stylopharyngeus muscles. In the infrahyoid muscle group are the omohyoid, sternothyroid, thyrohyoid, and sternohyoid muscles.
What muscle has the origin of medial clavicle and Manubrium?
The sternohyoid is a strap like infrahyoid muscle that connects the hyoid bone with the clavicle and sternum….Sternohyoid muscle.
| Origin | Manubrium of sternum, medial end of clavicle |
|---|---|
| Blood supply | Superior thyroid artery |
What muscles connect to the collarbone?
Relevant Anatomy The clavicle is an S-shaped bone that is anchored by strong ligamentous attachments on both its medial and lateral ends. Muscular attachments to the clavicle include the sternocleidomastoid, pectoralis major, and subclavius muscles proximally and the deltoid and trapezius muscles distally.
Is hyoid bone part of larynx?
hyoid bone, U-shaped bone situated at the root of the tongue in the front of the neck and between the lower jaw and the largest cartilage of the larynx, or voice box.
What is the origin of the clavicle muscle?
The muscle originates on the medial end of the clavicle and the sternum, and inserts with tendonous fibers to the hyoid. Due to its location, it is useful for several functions including depression of the hyoid bone, head and neck movement, and speech.
What are the two largest cartilages of the larynx?
• Cartilages, ligamentous membranes and muscles below the hyoid bone and above the trachea • Anterior to the 3-6thcervical vertebra, develops from the 4thand 6 branchial arches • Facilitates breathing and sound production • Two largest cartilages are the thyroid and cricoid cartilages joined by the cricothyroid membrane Anatomy of the Larynx
What are the hyoid muscles?
The hyoid muscles are superficial muscles in the neck which attach to the hyoid bone. They are grouped according to their position to the hyoid bone, the suprahyoid muscles lie above the hyoid bone and the infrahyoid muscles lie beneath it.
Is sternohyoid syndrome a mass on the lower lateral neck?
If a mass on the lower lateral neck exists with swallowing and disappears after swallowing, it has been diagnosed as an omohyoid syndrome in most literature. The mechanism of sternohyoid syndrome has not been proven or investigated before. We investigated sternohyoid syndrome, commonly misdiagnosed as an omohyoid syndrome.
