Chapter 3. Anatomy of Neck

Question 1

Sternocleidomastoid

Answer 1

action: tilts and rotates head
innervation: accessory nerve

Question 2

trapezius

Answer 2

action: moves the scapula and supports the arm
innervation: accessory nerve

Question 3

anterior, middle, and posterior scalene

Answer 3

action: elevates the rib during forced breathing
innervation: brachial plexus

Question 4

levator scapulae

Answer 4

action: elevates scapulae
innervation: brachial plexus

Question 5

superior & inferior belly of omohyoid

Answer 5

action: depresses the hyoid bone while swallowing and speaking
innervation: ansa cervicalis

Question 6

anterior & posterior belly of the digastric

Answer 6

action: assists in depressing the mandible, raises and steadies hyoid bone during swallowing and speaking
innervation: (anterior) trigeminal nerve & (posterior) facial nerve

Question 7

stylohyoid

Answer 7

action: elevates and retracts the hyoid bone
innervation: facial nerve

Question 8

sternohyoid, sternothyroid, thyrohyoid

Answer 8

action: depresses the hyoid bone while swallowing and speaking
innervation: ansa cervicalis (sterno) & C1 (thyro)