Head neck and brain

Question 1

Innervation to Platysma

Answer 1

facial nerve

Question 2

Most superficial muscle in neck

Answer 2

Platysma

Question 3

Innervation to sternocleidomastoid

Answer 3

spinal accessory nerve - CN XI (lateral rotation of neck)

Question 4

Innervation to trapezius

Answer 4

spinal accessory nerve - CN X

Question 5

Function of suprahyoid muscles

Answer 5

elevate hyoid bone and pull it anteriorly + superiorly to aid in swallowing + speaking

• closure of epiglottis
• opening oesophageal sphincter

Question 6

Main function of the infrahyoid muscle

Answer 6

depress hyoid bone

Question 7

Blood supply to scalp

Answer 7

• superficial temporal artery
• occipital artery
• posterior auricular A
• supraorbital artery => (branch of opthalmic A)
• supratrochlear artery => (branch of opthalmic A)