|Artery||Superior thyroid artery|
|Nerve||First cervical nerve (C1) via hypoglossal nerve|
|Actions||Elevates thyroid and depresses the hyoid bone|
What muscle elevates thyroid cartilage depress hyoid bone?
The omohyoid muscle, which has superior and inferior bellies, depresses the hyoid bone in conjunction with the sternohyoid and thyrohyoid muscles. The thyrohyoid muscle also elevates the thyroid cartilage, whereas the sternothyroid depresses it to create different tones of voice.
What do the Infrahyoid muscles do?
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 depresses the larynx.
What strap muscles overlie thyroid gland?
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.
What attaches to the thyroid cartilage?
The entire superior edge of the thyroid cartilage is attached to the hyoid bone by the thyrohyoid membrane. The thyroid cartilage is found between the levels of the C4 to C5 vertebrae. The oblique line is a line on the thyroid cartilage. It marks the upper lateral borders of the thyroid gland.
What muscles depress the thyroid cartilage?
The thyrohyoid muscle is a small skeletal muscle on the neck which depresses the hyoid and elevates the larynx.
What muscles attach to the hyoid?
A large number of muscles attach to the hyoid:
- Superior. Middle pharyngeal constrictor muscle. Hyoglossus muscle. Genioglossus. Intrinsic muscles of the tongue. Suprahyoid muscles. Digastric muscle. Stylohyoid muscle. Geniohyoid muscle. Mylohyoid muscle.
- Inferior. Thyrohyoid muscle. Omohyoid muscle. Sternohyoid muscle.
What are the 4 Suprahyoid muscles?
The four suprahyoid muscles are the mylohyoid, geniohyoid, stylohyoid, and digastric muscles.
What muscles throw a head back?
The suboccipitals, splenius, and semispinalis muscles extend and rotate the head. The trapezius functions largely as a scapula muscle but, when forcibly and chronically contracted, will pull the head back.
What facial muscle would you use to whistle?
The majority of the face is composed of the buccinator muscle, which compresses the cheek. This muscle allows you to whistle, blow, and suck; and it contributes to the action of chewing.
Why does the thyroid gland move during swallowing?
The thyroid gland and all thyroid swelling move with the swallowing/deglutition because the thyroid is attached to the cartilage of the larynx by the suspensory ligament of Berry.
Which of the following is not a Infrahyoid muscle?
The stylopharyngeus muscle is considered by many to be one of the strap muscles, but is not an infrahyoid muscle.
What muscles consist of two bellies?
Structure. The digastricus (digastric muscle) consists of two muscular bellies united by an intermediate rounded tendon. The two bellies of the digastric muscle have different embryological origins, and are supplied by different cranial nerves.
Can thyroid cartilage be felt?
Put your finger on tip of your chin and slide that finger down the midline. The first structure you hit is the top of the thyroid cartilage, which despite its name, is not where the thyroid gland is situated. Keep moving your finger down your neck to the Adam’s apple. Just beyond you will feel the cricoid cartilage.
Can you feel thyroid cartilage?
You may feel a thyroid nodule rolling beneath your fingertips or see it move with your thyroid gland when you swallow. A goiter (swelling) may be seen on one side of the thyroid, and occasionally on both.
What level is the thyroid cartilage?
The thyroid cartilage is the largest of the cartilages of the larynx, with its superior pole sitting at the level of the C4 vertebra.