Hyoid bone
The hyoid bone is a horseshoe-shaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage. At rest, it lies at the level of the base of the mandible in the front and the third cervical vertebra behind.
Hypoglossal nerve
The hypoglossal nerve is the twelfth cranial nerve, and innervates all the extrinsic and intrinsic muscles of the tongue, except for the palatoglossus which is innervated by the vagus nerve. It is a nerve with a solely motor function. The nerve arises from the hypoglossal nucleus in the brain stem as a number of small rootlets, passes through the hypoglossal canal and down through the neck, and even…
What is the thyrohyoid muscle?
Nov 14, 2019 · Thyrohyoid is a small, quadrilateral muscle found in the anterior triangle of the neck. It is one of four members of the group of muscles known as the infrahyoid muscles. The other three muscles in this group are sternohyoid, sternothyroid and omohyoid. The muscles are invested by the pretracheal layer of deep cervical fascia.
What is the thyroid hyoid?
The thyrohyoid (also thyrohyoid muscle, latin: musculus thyrohyoideus) is a muscle located in the neck region between the thyroid cartilage and the hyoid bone that depresses the hyoid bone. The thyrohyoid belongs to the infrathyroid muscle group.
What does the thyrohyoid look like?
[thi″ro-hi´al, thi″ro-hi´oid] (thyrohyoid) pertaining to the thyroid gland or cartilage and the hyoid bone.
What is the thyrohyoid membrane?
Feb 18, 2015 · Thyrohyoid A member of the infrahyoid group of muscles, the thyrohyoid muscle elevates the thyroid gland while depressing the hyoid bone. These actions play a role in swallowing and speech. The...
What is the function of thyrohyoid?
The thyrohyoid membrane connects the thyroid cartilage to the hyoid bone and facilitates the superior movement of the larynx during swallowing. It is separated from the hyoid body by a bursa that facilitates this upward movement during swallowing.Jul 31, 2021
What is thyrohyoid membrane?
The thyrohyoid membrane is one of the extrinsic membranes that compose the larynx. It is a broad fibro-elastic layer named for its attachments as it attaches the upper border of the thyroid cartilage to the hyoid bone. The thicker median section of the membrane is the thyrohyoid ligament.Jul 31, 2021
Where does the thyrohyoid originate?
Thyrohyoid muscleOriginOblique line of thyroid cartilageInsertionInferior border of body and greater horn of hyoid boneActionDepresses hyoid bone Elevates larynxInnervationAnterior ramus of spinal nerve C1 via hypoglossal nerve (CN XII)Blood supplyBranches of lingual and superior thyroid arteriesMay 11, 2020
Is thyrohyoid a infrahyoid muscle?
Anatomical terms of muscle The infrahyoid muscles, or strap muscles, are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.
What penetrates the thyrohyoid membrane?
The internal branch of superior laryngeal nerve (IBSLN) pierces the thyrohyoid membrane above the entrance of superior laryngeal artery.Jun 1, 2016
What goes through thyrohyoid membrane?
The thyrohyoid membrane contains an aperture through which the internal branch of the superior laryngeal nerve and associated vessels course.
Is thyrohyoid a strap muscle?
There are four strap muscles: thyrohyoid: deep and lateral. omohyoid: superficial and lateral. sternohyoid: superficial and medial.Mar 12, 2021
What Innervates the Geniohyoid?
Innervation. Geniohyoid is supplied by the first cervical spinal nerve, through the hypoglossal nerve.
Why are they called strap muscles?
The name "strap muscles" comes from their long and flat shape, similar to a belt or strap 3.Nov 20, 2015
Why is the thyrohyoid muscle clinically relevant?
The thyrohyoid muscle depresses the hyoid bone and elevates the larynx and the thyroid cartilage, drawing them together. By controlling the position and shape of the larynx, it aids in making sound.
What Innervates the Infrahyoid?
ansa cervicalisThe ansa cervicalis (or ansa hypoglossi) is the union of the C1, C2, and C3 nerves from the cervical plexus, which provides innervation to the infrahyoid muscles (Figure 31.2).
What is the main function of the infrahyoid muscles?
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.Jul 29, 2021
Where is the thyroid gland located?
The thyroid gland is located in the center of the neck, just above the collarbone. The hyoid lies in the neck, just below the lower jawbone, or mandible. A small muscle, the thyrohyoid looks like a vertical extension of the sternothyroideus muscle within the neck. It originates in the thyroid cartilage (the Adam’s apple), ...
What is the hyoid bone?
The hyoid bone itself is a curved structure in the throat made up of a central body and areas where muscles and ligaments attach, called the greater and lesser cornu . The hyoid helps protect the thyroid gland and other anatomical components located in the upper throat. Last medically reviewed on February 18, 2015.
Which muscle elevates the thyroid gland?
Thyrohyoid. A member of the infrahyoid group of muscles, the thyrohyoid muscle elevates the thyroid gland while depressing the hyoid bone. These actions play a role in swallowing and speech. The thyroid gland is located in the center of the neck, just above the collarbone. The hyoid lies in the neck, just below the lower jawbone, or mandible.
Where does the cervical nerve originate?
It originates in the thyroid cartilage (the Adam’s apple), and it inserts into the greater cornu of the hyoid bone, which is the hyoid’s back-most area. The first cervical nerve supplies the thyrohyoid with nerves. It extends out from the atlas bone, which is the topmost vertebra of the spinal column. For a brief stretch, the first cervical nerve ...
What is the thyrohyoid membrane?
The thyrohyoid membrane is a wide and fibrous layer of tissue that connects the thyroid cartilage to the hyoid bone.
Where is the hyoid located?
The hyoid is located in the neck, just below the lower jawbone, or mandible. The thyrohyoid membrane creates the conditions necessary for the upward movement of the larynx during deglutition, or swallowing.
What is it called when your thyroid makes too much or too little?
When your thyroid makes either too much or too little of these important hormones, it’s called a thyroid disease. There are several different types of thyroid disease, including hyperthyroidism, hypothyroidism, thyroiditis and Hashimoto’s thyroiditis.
Where is the thyroid gland located?
The thyroid gland is a small organ that’s located in the front of the neck, wrapped around the windpipe (trachea). It’s shaped like a butterfly, smaller in the middle with two wide wings that extend around the side of your throat. The thyroid is a gland.
What is it called when your body uses energy too quickly?
When the thyroid makes too much thyroid hormone, your body uses energy too quickly. This is called hyperthyroidism.
What are the two main types of thyroid disease?
The two main types of thyroid disease are hypothyroidism and hyperthyroidism. Both conditions can be caused by other diseases that impact the way the thyroid gland works. Conditions that can cause hypothyroidism include: Thyroiditis: This condition is an inflammation (swelling) of the thyroid gland.
What is the function of the thyroid gland?
The thyroid is a gland. You have glands throughout your body, where they create and release substances that help your body do a specific thing. Your thyroid makes hormones that help control many vital functions of your body. When your thyroid doesn’t work properly, it can impact your entire body.
How long does iodine last?
This can last for a few weeks or months. Excessive iodine: When you have too much iodine (the mineral that is used to make thyroid hormones) in your body, the thyroid makes more thyroid hormones than it needs. Excessive iodine can be found in some medications (amiodarone, a heart medication) and cough syrups.
Which hormone controls metabolism?
The thyroid controls your metabolism with a few specific hormones — T4 (thyroxine, contains four iodide atoms) and T3 (triiodothyronine, contains three iodide atoms). These two hormones are created by the thyroid and they tell the body’s cells how much energy to use.
