post lab cranial nerves

• name these facial muscles and what facial nerve part is it innervated by?

  A) Temporal

  B) zygomatic

  C) Buccal branches

  D) Marginal mandibular branches

  E) Cervical branches

  F) Corrugator Supercilli

  G) Orbicular's Oculi

  H) Frontalis

  I) Epicranial Aponeurosis

  J) Procerus

  K) levator labi Alaque Nasi

  L) nasalis

  M) depressor septi nasi

  N) Levator labii superioris

  O) Levator anguli oris

  P) Zygomaticus minor

  Q) Zygomaticus major

  R) buccinator

  S) Orbicularis oris

  T) Depressor anguli oris

  U) depressor labii inferioris

  V) Mentalis

  W) Risorius

  X) Platysma

  
• where does it exit the skull - The Olfactory Nerve (CN I)because it does not originate in the brainstem. It uses the cribriform plate to exit the skull and enter the superior nasal cavity to provide our sense of smell

  
• The Optic Nerve (CN II) does not originate in the brainstem. However, you can see the optic chiasm at the midbrain level
• Which two cranial exits contain the most cranial nerves, and which nerves pass through each?

  A) superior orbital fissure

  B) CN VI

  C) CN III

  D) CN VI

  E) CN V - v1

  F) jugular foramen

  G) CN IX

  H) CN X

  I) CN XI

  
• Which cranial nerve has the longest intracranial course, and how doesthis make it clinically vulnerable?

  The Trochlear Nerve (CN IV) has the longest intracranial course because it is the only cranial nerve to exit the brainstem dorsally. This makes it clinically vulnerable with damage to the dorsal brainstem potentially causing diplopia and difficulties looking downward in patients.