Explore the Fascinating Compartments of the Neck

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Name two structures that can be found within the posterior triangle of the neck.

Spinal accessory nerve (CN11) and cervical plexus.

What is the function of the spinal accessory nerve (CN11) within the posterior triangle of the neck?

Motor innervation to the trapezius and sternocleidomastoid muscles.

Which muscles run deep to the prevertebral fascia in the posterior triangle of the neck?

Scalene muscles (posterior, middle, and anterior).

What important network of nerves can be found between the scalene muscles in the posterior triangle of the neck?

Brachial plexus. Signup and view all the answers

What is the role of the jugular veins in the circulation of blood in the head and neck?

Draining blood from various regions of the head and neck. Signup and view all the answers

Which jugular vein is deep to the sternocleidomastoid muscle?

Internal jugular vein. Signup and view all the answers

What is the final vessel responsible for draining the blood collected by the jugular veins into the heart?

Superior vena cava. Signup and view all the answers

What are the two main sets of muscles in the anterior compartment of the neck associated with the hyoid bone?

Suprahyoid muscles and infrahyoid muscles. Signup and view all the answers

What is the primary function of the suprahyoid muscles?

Elevate the hyoid bone. Signup and view all the answers

What is the primary function of the infrahyoid muscles?

Depress the hyoid bone. Signup and view all the answers

What are the four compartments of the neck?

The four compartments of the neck are vertebral, musculofascial, carotid, and visceral. Signup and view all the answers

What type of fascia surrounds the vertebral compartment?

The vertebral compartment is surrounded by prevertebral fascia. Signup and view all the answers

Which compartment is enclosed by the carotid sheath?

The carotid compartment is enclosed by the carotid sheath. Signup and view all the answers

What is the name of the fascia that encircles the musculofascial compartment?

The musculofascial compartment is encircled by deep cervical fascia. Signup and view all the answers

Which compartment is primarily visible from the anterior aspect?

The visceral compartment is primarily visible from the anterior aspect. Signup and view all the answers

How do the compartments and their associated fascia separate structures from one another?

The compartments and their associated fascia separate structures from one another by creating physical barriers. Signup and view all the answers

What is the clinical relevance of the separation of compartments by fascia?

The separation of compartments by fascia can limit the spread of infections by requiring them to traverse multiple layers of fascia to enter another compartment. Signup and view all the answers

How many clinically relevant triangles are there in the neck?

There are two clinically relevant triangles in the neck. Signup and view all the answers

What are the boundaries of the posterior triangle of the neck?

The boundaries of the posterior triangle of the neck are the trapezius muscle and the sternocleidomastoid muscle. Signup and view all the answers

Which triangle of the neck is more clinically significant?

The anterior triangle of the neck is more clinically significant than the posterior triangle. Signup and view all the answers

What are the infrahyoid muscles and why are they called infrahyoid?

The infrahyoid muscles are a group of muscles located below the hyoid bone. They are called infrahyoid because of their position below the hyoid bone. Signup and view all the answers

What are the attachments of the thyrohyoid muscle?

The thyrohyoid muscle runs from the thyroid cartilage to the hyoid bone. Signup and view all the answers

Describe the structure and attachments of the omohyoid muscle.

The omohyoid muscle consists of a superior and inferior belly, separated by a tendon. It extends from the curvature of the hyoid bone to the back of the scapula (subscapular fossa). Signup and view all the answers

Where does the sternothyroid muscle originate and where does it stop?

The sternothyroid muscle originates from the upper posterior surface of the sternum and stops at the thyroid cartilage, not reaching the hyoid bone. Signup and view all the answers

How do the thyrohyoid and sternothyroid muscles connect?

The thyrohyoid and sternothyroid muscles both attach to the thyroid cartilage, essentially connecting them. Signup and view all the answers

What is the innervation of the infrahyoid muscles?

The infrahyoid muscles are innervated by cervical spinal nerves from C1 to C3, as well as fibers from the Ansa Cervicalis. Signup and view all the answers

What are the functions of the suprahyoid muscles?

The suprahyoid muscles play a role in elevating the hyoid bone and are involved in activities such as swallowing and vocalization. Signup and view all the answers

Describe the attachments and innervation of the mylohyoid muscle.

The mylohyoid muscle runs from the mandible to the hyoid bone. It is innervated by CN5 V3. Signup and view all the answers

Where does the geniohyoid muscle extend from and to?

The geniohyoid muscle extends from the hyoid bone to the posterior aspect of the mandibular symphysis. Signup and view all the answers

What is the innervation of the stylohyoid muscle?

The stylohyoid muscle is innervated by CN7. Signup and view all the answers