Chapter 9 (Anterior Cervical Region of Neck)

Question 1

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Anterior

Answer 1

Median line of the neck

Question 2

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Posterior

Answer 2

Anterior border of sternocleidomastoid

Question 3

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Superior

Answer 3

Inferior border of mandible

Question 4

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Apex

Answer 4

Jugular notch in the manubrium

Question 5

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Roof

Answer 5

Subcutaneous tissue containing the platysma

Question 6

(Anterior Cervical Region)

The boundaries of the anterior cervical triangle include - Floor

Answer 6

Pharynx, larynx, and thyroid gland

Question 7

Suprahyoid Muscles

Answer 7

• Mylohyoid
• Geniohyoid
• Stylohyoid
• Digastric

Question 8

(Suprahyoid Muscles)

Mylohyoid (Innervation and action)

Answer 8

• Innervation: Nerve to mylohyoid

- Elevates hyoid, floor of mouth, and tongue during swallowing and speaking

Question 9

(Suprahyoid Muscles)

Geniohoid (innervation and action)

Answer 9

• Innervation: C1 via hypoglossal nerve (CN XII)

- Action: Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx

Question 10

(Suprahyoid Muscles)

Stylohyoid (innervation and action)

Answer 10

• Innervation: Styloid branch of facial nerve (CN VII)

- Action: Elevates and retracts hyoid, thus elongating floor of mouth

Question 11

(Suprahyoid Muscles)

Digastric - anterior belly (Innervation and action)

Answer 11

• Innervation: nerve to myohyoid, a branch of inferior aveolar nerve
• Action: depresses mandible against resistance; elevates hyoid during swallowing and speaking

Question 12

(Suprahyoid Muscles)

Digastric - posterior belly (innervation and action)

Answer 12

• Innervation: Digastric branch of facial nerve (CN VII)

- Action: depresses mandible against resistance; elevates hyoid during swallowing and speaking

Question 13

(Infrahyoid Muscles)

Sternohyoid (innervation and action)

Answer 13

• Innervation: C1-C3 by a branch of ansa cervicalis

- Action: Depresses hyoid after elevation during swallowing

Question 14

(Infrahyoid Muscles)

Omohyoid (Innervation and action)

Answer 14

• Innervation: C1-C3 by a branch of ansa cervicalis

- Action: Depresses, retracts, and steadies hyoid

Question 15

(Infrahyoid Muscles)

Sternothyroid (innervation and action)

Answer 15

• Innervation: C2 and C3 by a branch of ansa cervicalis

- Action: Depresses hyoid and larynx

Question 16

(Infrahyoid Muscles)

Thyrohyoid

Answer 16

• Innervation: C1 via hypoglossal nerve (CN XII)

- Action: Depresses hyoid and elevates larynx

Question 17

(Neurovascular Supply)

Arterial supply:

Answer 17

Carotid system of arteries:

• Common carotid arteries
• Internal carotid arteries
• External carotid arteries and branches (ascending pharyngeal, occipital, posterior auricular, superior thyroid, lingual, facial)

Question 18

(Neurovascular Supply)

Veins:

Answer 18

Tributaries of the internal jugular vein

Question 19

(Neurovascular Supply)

Nerves:

Answer 19

• Transverse cervical nerve (C2 and C3)
• Hypoglossal nerve (XII)
• Branches of glossopharyngeal (CN IX) and vagus (X) nerves