Neck Fascia and Triangles of the Neck (work in progress)

Question 1

What are the boundaries of the Posterior Triangle of the Neck?
- Anterior, Posterior, Inferior, Roof, and Floor

Answer 1

Ant - Sternocleidomastoid
Post - Trapezius muscle
Inf - Clavicle
Roof - Skin, superficial fascia with platysma and deep investing fascia
Floor - Prevetebral fascia and muscles

(Muscles: Splenius capitius, levator scapulae, and posterior, middle, and anterior scalenes)

Question 2

What muscles lie in the Posterior Triangle of the Neck?

Answer 2

Splenius capitius, levator scapulae, and posterior, middle, and anterior scalenes

Question 3

What key muscle forms the subdivisions of the Posterior Triangle of the neck?

Answer 3

The omohyoid muscle

(The inferior belly of the omohyoid form the Occipital triangle (superior) and the Supraclavicular triangle (inferior)).

Question 4

What are the boundaries of the Anterior Triangle of the Neck?

Answer 4

Ant - Midline of face
Post - Sternocleidomastoid
Superior - Inferior border of mandible
Roof - skin, superficial fascia with platysma muscle and deep investing fascia
Floor - pharynx, larynx, and thyroid

Question 5

What are the subdivisions of the Anterior Triangle of the Neck?

Answer 5

Submental triangle
Submandibular triangle
Carotid triangle
Muscular triangle

(Key muscles: omohyoid and digastric)

Question 6

What comprises the Superficial cervical fascia of the neck?

Answer 6

Subcutaneous tissue and platysma muscle

Question 7

What are the four subdivisions of the Deep fascia of the neck?

Answer 7

Investing fascia
Pretrachial fascia
Cartoid sheath
Prevetebral fascia

Question 8

Describe the Investing fascia of the neck

Answer 8

• Envelopes the entire neck (like a sock)
• Splits to envelope Trapezius and Sternocleidomastoid
• Superiorly encapsulates parotid and submandibular glands

Question 9

Describe the Pretrachial fascia

Answer 9

• Contains the Thyroid gland, Trachea, and Esophagus
• Does not envelope muscles
• Continuous with buccopharyngeal fascia superiorly and descends to mediasteinum (“a free ride to the heart”)

Question 10

Describe the Prevetebral fascia

Answer 10

Envelopes vertebrate and muscles

Question 11

What structures lie within the carotid sheath?

Answer 11

Vagus nerve
Common carotid
Internal jugular

Question 12

What are the boundaries of the Root of the Neck?

Answer 12

Laterally: 1st pair of ribs and cartilages
Anterior: Manubrium of sternum
Posterior: Body of T1 vertebrae