Table of Contents
What is the function of the 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.
Why is the thyrohyoid muscle important?
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 is the main function of 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. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.
What is the nerve supply of the thyrohyoid muscle?
Innervation. The thyrohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus, which courses with the hypoglossal nerve. The nerve fibres are thus not from the hypoglossal nucleus.
What is the thyrohyoid ligament?
The lateral thyrohyoid ligament (lateral hyothyroid ligament) is a round elastic cord, which forms the posterior border of the thyrohyoid membrane and passes between the tip of the superior cornu of the thyroid cartilage and the extremity of the greater cornu of the hyoid bone.
What Innervates the Geniohyoid?
Innervation. The geniohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus which courses with the hypoglossal nerve in to the floor of the mouth.
What is the main role of the cutaneous skeletal muscles of the face?
The largest portion of muscle between the origin and insertion. What is the main role of the the cutaneous skeletal muscles of the face? Communication through facial expressions. Which of the following is NOT a role of the anterior abdominal wall muscles?
What is Thyrohyoid muscle?
The thyrohyoid muscle is an infrahyoid muscle of the neck that is innervated by the ventral ramus of C1. The primary function of the thyrohyoid muscle is to depress and fix the hyoid bone and larynx though it may also raise the larynx when the hyoid bone is fixed.
Is the 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.
Where is the Thyrohyoid muscle?
The thyrohyoid muscle is deep to the superior belly of the omohyoid muscle and sternohyoid muscle. It originates end to end on the oblique line of the thyroid cartilage with the sternothyroid muscle.
Where is the thyrohyoid ligament?
What is the origin of geniohyoid muscle?
Origin. The geniohyoid is a paired slender ribbon of muscle that originates from the inferior mental spine on the posterior surface of the mandibular symphysis.
What is the function of the thyrohyoid muscle?
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.
Is the thyrohyoid part of the hyoid bone?
Thyrohyoid. 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), 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.
What are the main facts about the stylohyoid muscle?
Key facts about the stylohyoid muscle Origins Styloid process of temporal bone Insertions Body of hyoid bone Action Elevates and draws hyoid bone posteriorl Innervation Stylohyoid branch of facial nerve (CN VI Blood supply Branches from the facial, occipital and
Is the thyrohyoid muscle innervated by the ansa?
Thyrohyoid, unlike the other infrahyoid muscles, is not innervated by the ansa cervicalis. Instead, nerve fibers from the anterior rami of the first cervical spinal nerve (C1) reach the muscle via the hypoglossal nerve (CN XII).