Suprahyoid Muscles Action: Quiz and Flashcards

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Questions and Answers

Which group of muscles is located superiorly to the hyoid bone of the neck?

Laryngeal muscles

Suprahyoid muscles (correct)

Pharyngeal muscles

Infrahyoid muscles

What is the action of the stylohyoid muscle?

Arises from the digastric fossa of the mandible

Attaches to the mastoid process of the temporal bone

Depresses the mandible and elevates the hyoid bone

Initiates a swallowing action by pulling the hyoid bone in a posterior and superior direction (correct)

Which artery supplies the suprahyoid muscles?

Facial artery (correct)

Subclavian artery

Carotid artery

Brachial artery

What nerve innervates the stylohyoid muscle?

Stylohyoid branch of the facial nerve (CN VII) Signup and view all the answers

In some cadaveric specimens, the tendon of which muscle can be seen to pierce the stylohyoid muscle?

Digastric muscle Signup and view all the answers

From where does the anterior belly of the digastric muscle arise?

Digastric fossa of the mandible Signup and view all the answers

What action does the digastric muscle perform?

Depresses the mandible and elevates the hyoid bone Signup and view all the answers

Which nerve innervates the anterior belly of the digastric muscle?

Trigeminal nerve Signup and view all the answers

What is the action of the mylohyoid muscle?

Elevates the hyoid bone Signup and view all the answers

Which nerve innervates the posterior belly of the digastric muscle?

Facial nerve Signup and view all the answers

What is the origin of the mylohyoid muscle?

Mylohyoid line of the mandible Signup and view all the answers

Which nerve innervates the geniohyoid muscle?

Hypoglossal nerve Signup and view all the answers

Which muscle forms the floor of the oral cavity?

Mylohyoid Signup and view all the answers

What action does the geniohyoid muscle perform?

Depresses the mandible Signup and view all the answers

What nerve innervates the mylohyoid muscle?

Trigeminal nerve Signup and view all the answers

From where does the geniohyoid muscle arise?

Mental spine of the mandible Signup and view all the answers

What is the action of the digastric muscle?

Elevates the hyoid bone and the floor of the mouth Signup and view all the answers

Which nerve innervates the stylohyoid muscle?

Facial nerve Signup and view all the answers

Which muscle forms the floor of the oral cavity?

Mylohyoid muscle Signup and view all the answers

Study Notes

Suprahyoid Muscles

Group of 4 muscles located superiorly to the hyoid bone of the neck
Function: elevate the hyoid bone, involved in swallowing
Arterial supply: branches of the facial artery, occipital artery, and lingual artery

Stylohyoid Muscle

Thin muscular strip located superiorly to the posterior belly of the digastric muscle
Attachments: arises from the styloid process of the temporal bone, attaches to the lateral aspect of the hyoid bone
Actions: initiates a swallowing action by pulling the hyoid bone in a posterior and superior direction
Innervation: stylohyoid branch of the facial nerve (CN VII), arises proximally to the parotid gland

Digastric Muscle

Comprised of two muscular bellies connected by a tendon
Attachments:
- Anterior belly arises from the digastric fossa of the mandible
- Posterior belly arises from the mastoid process of the temporal bone
- Intermediate tendon attached to the hyoid bone via a fibrous sling
Actions: depresses the mandible and elevates the hyoid bone

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Description

Test your knowledge about the anatomy of the suprahyoid muscles, a group of 4 muscles located in the neck area superior to the hyoid bone. Learn about their actions, attachments, and arterial supply.