What is the 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.
What are Infrahyoid and suprahyoid muscles?
Infrahyoid muscles are below hyoid, while Suprahyoid muscles are labeled above. The suprahyoid muscles are four muscles located above the hyoid bone in the neck. They are the digastric, stylohyoid, geniohyoid, and mylohyoid muscles. They are all pharyngeal muscles, with the exception of the geniohyoid muscle.
What is the functional difference between suprahyoid muscles and infrahyoid muscles?
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. These muscles act to stabilise the trachea and play a vital part in swallowing and speech.
What is Infrahyoid neck?
The infrahyoid neck is the region of the neck extending from the hyoid bone to the thoracic inlet. This is one of the ‘strap’ muscles, an important landmark in the neck. It is a group of four pairs of muscles in the anterior part of the neck: the sternothyroid, sternohyoid, thyrohyoid and omohyoid muscles.
What are infrahyoid muscles?
The infrahyoid muscles are a group of four paired muscles that lie inferiorly to the hyoid bone in the anterior aspect of neck. This group of muscles is also known as strap muscles. They connect hyoid, sternum, clavicle and scapula. Infrahyoid muscles are organised in two layers.
What are the infrahyoid muscles innervated by?
All of the infrahyoid muscles are innervated by the ansa cervicalis from the cervical plexus (C1-C3) except the thyrohyoid muscle, which is innervated by fibers only from the first cervical spinal nerve travelling with the hypoglossal nerve.
What muscles are in the Infrahyoid group?
infrahyoid muscles
- sternohyoid muscle.
- sternothyroid muscle.
- thyrohyoid muscle.
- omohyoid muscle.
What are considered infrahyoid muscles?
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 does the Suprahyoid muscle do?
The suprahyoid musculature includes the geniohyoid, mylohyoid, stylohyoid, hyoglossus, and the anterior belly of the digastric muscle. These muscles attach to the superior aspect of the hyoid bone, and their main combined function is to elevate the hyoid and larynx and move them superiorly and anteriorly.
What are the intrinsic muscles?
Definition. A group of muscles located within or situated deeper in a structure, in contrast to extrinsic muscles located rather superficially. Supplement. Based on the above definition, the intrinsic muscles refer to the muscles closest to the axial and appendicular skeleton.
Which of the following describes the Suprahyoid muscles?
Which of the following describes the suprahyoid muscles? They are a group of muscles that lie superior to the hyoid bone and help form the floor of the oral cavity. The supraspinatus is named for its location on the posterior aspect of the scapula above the spine.
What are intrinsic and extrinsic muscles?
The extrinsic muscle groups are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The intrinsic group is the smaller muscles located within the hand itself. The hand muscles are innervated by the radial, median, and ulnar nerves from the brachial plexus.