cranial nerve 7

Question 1

name of cranial nerve 7 and what does it supply

Answer 1

• facial nerve

- motor innervation to muscles of mastication

Question 2

name the 5 main muscles of facial expression

Answer 2

• frontalis
• orbicularis oculi
• orbicularis oris
• buccinator
• zygomatic

Question 3

what are the 5 branches of facial nerves

Answer 3

• temporal
• zygomatic
• buccal
• mandibular
  -cervical
  divide in parotid gland

Question 4

functional tests

Answer 4

• wrinkle forehead
• screw up eyes tightly
• purse lips and puff out cheeks
• inspect facil droop

Question 5

damage to cranial nerve 7

Answer 5

• if between middle ear and brainstem - all branches and functions are lost
• after middle ear - taste intact but facial expression lost on that side
• on face - individual muscle group lost depending on branches damaged