Neck & Head muscles : FINAL EXAM

Question 0

SCM insertion

Answer 0

sternal head: anterior surface of manubrium of sternum

clavicular head: superior surface of medial 3rd of clavicle

Question 1

SCM origin

Answer 1

lateral border of mastoid process of temporal bone

lateral half of superior nuchal line

Question 2

SCM innervation

Answer 2

spinal accessory nerve

Question 3

platysma origin

Answer 3

inferior border of mandible, skin, and subcutaneous tissues of lower face

Question 4

platysma insertion

Answer 4

fascia covering superior parts of pectoralis major and deltoid muscles

Question 5

platysma innervation

Answer 5

cervical branch of facial nerve

Question 6

platysma action

Answer 6

draws corners of mouth inferior and widens it as in expressions of sadness and fright
draws skin of neck superiorly when teeth are clenched, indicating tension

Question 7

sternohyoid action

Answer 7

manubrium of sternum

medial end of clavicle

Question 8

sternohyoid insertion

Answer 8

body of hyoid

Question 9

sternohyoid innervation

Answer 9

C1-C3 by a branch of ansa cervicalis

Question 10

sternohyoid action

Answer 10

depresses hyoid after elevation during swallowing