Podcast
Questions and Answers
Which group of muscles are located inferiorly to the hyoid bone?
Which group of muscles are located inferiorly to the hyoid bone?
- Suprahyoid muscles
- Lateral neck muscles
- Superficial neck muscles
- Infrahyoid muscles (correct)
How many muscle bellies is the omohyoid comprised of?
How many muscle bellies is the omohyoid comprised of?
- One
- Four
- Three
- Two (correct)
Which muscle arises from the scapula and runs underneath the sternocleidomastoid muscle?
Which muscle arises from the scapula and runs underneath the sternocleidomastoid muscle?
- Omohyoid (correct)
- Thyrohyoid
- Sternothyroid
- Sternohyoid
To which bone does the superior belly of the omohyoid muscle attach?
To which bone does the superior belly of the omohyoid muscle attach?
What is the action of the sternohyoid muscle?
What is the action of the sternohyoid muscle?
Which arteries supply the infrahyoid muscles?
Which arteries supply the infrahyoid muscles?
What innervates the omohyoid muscle?
What innervates the omohyoid muscle?
Which muscle is wider and deeper than the sternohyoid?
Which muscle is wider and deeper than the sternohyoid?
What is the innervation of the sternothyroid muscle?
What is the innervation of the sternothyroid muscle?
Which structure anchors the intermediate tendon of the omohyoid muscle to the clavicle?
Which structure anchors the intermediate tendon of the omohyoid muscle to the clavicle?
Where does the superior belly of the omohyoid muscle attach?
Where does the superior belly of the omohyoid muscle attach?
Which arteries supply the arterial blood to the infrahyoid muscles?
Which arteries supply the arterial blood to the infrahyoid muscles?
What is the action of the thyrohyoid muscle?
What is the action of the thyrohyoid muscle?
Which muscle in the infrahyoid group is wider and deeper than the sternohyoid?
Which muscle in the infrahyoid group is wider and deeper than the sternohyoid?
What is the innervation of the omohyoid muscle?
What is the innervation of the omohyoid muscle?
Where does the intermediate tendon of the omohyoid muscle anchor?
Where does the intermediate tendon of the omohyoid muscle anchor?
Which arteries supply the arterial blood to the infrahyoid muscles?
Which arteries supply the arterial blood to the infrahyoid muscles?
What is the action of the thyrohyoid muscle?
What is the action of the thyrohyoid muscle?
Study Notes
Muscles and Structures Related to the Hyoid Bone
- Infrahyoid muscles are located inferiorly to the hyoid bone.
- The omohyoid muscle consists of two muscle bellies: a superior belly and an inferior belly.
- The omohyoid muscle arises from the scapula and runs underneath the sternocleidomastoid muscle.
- The superior belly of the omohyoid muscle attaches to the hyoid bone.
Actions of the Infrahyoid Muscles
- The sternohyoid muscle primarily functions to depress the hyoid bone.
- The thyrohyoid muscle also functions to depress the hyoid but can elevate the thyroid cartilage.
Blood Supply and Innervation
- The infrahyoid muscles receive arterial supply from the superior thyroid and thyrocervical trunk.
- The omohyoid muscle is innervated by the superior root of the ansa cervicalis (C1-C3).
- The sternothyroid muscle is innervated by the ansa cervicalis.
Muscle Characteristics
- The sternothyroid muscle is wider and deeper compared to the sternohyoid muscle.
- The intermediate tendon of the omohyoid muscle is anchored to the clavicle by fibrous tissue connecting to the surrounding fascia.
Muscle Attachments
- The superior belly of the omohyoid muscle attaches to the body of the hyoid bone.
- The intermediate tendon anchors the omohyoid muscle, providing structural stability during movement.
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Description
Test your knowledge on the anatomy of the infrahyoid muscles located inferiorly to the hyoid bone in the neck. Learn about the two groups of infrahyoid muscles, arterial supply, and venous drainage.
