neck

Question 1

list superficial neck muscles

Answer 1

Platysma
Sternocledomastoid
Trapezius

Question 1

what is hyoid bone

Answer 1

• Lies in the anterior part of the neck at the level of the C3 vertebra
• U-shaped
• Does not articulate with any other bone
• Consists of a body (purple) and greater (red) and lesser (green) horns

Question 2

what is platysma innervated by

Answer 2

Superficial neck muscle innervated by facial nerve

Question 3

what is sternocledomastoid?

Answer 3

Deep to platysma on anterolateral surface of
neck

Question 4

what is origin, insertion, action, innervation of Sternocledomastoid

Answer 4

origin - Sternum, clavicle
insertion - mastoid process
Innervation - accessory nerve

action - Bilaterally - flex neck Unilaterally – laterally
flexes neck to ipsilateral
side and rotates head
to contralateral side

Question 5

what is trapezius?

Answer 5

a superficial neck muscle that
covers the posterior aspect of
neck