Cuteaneous Sensory & Innervation of Face

Question 1

what two nerves innervate the face?

Answer 1

trigeminal nerve and facial nerve

Question 2

what are the divisions of the trigeminal nerve?

Answer 2

1. opthalmic
2. maxillary
3. mandibular

Question 3

where does the trigeminal nerve arise from?

Answer 3

pons

Question 4

function of trigeminal nerve

Answer 4

sensory innervation of facial skin, muscles of mastication, sinuses, and mucous membranes of face

Question 5

describe trigeminal neuralgia. what causes it?

Answer 5

intense, stabbing pain in lower face/jaw or around eye/nose usually on one side of the face
caused by pressure on trigeminal nerve resulting in nerve to misfire

Question 6

opthalmic branch of trigeminal nerve
responsible for sensation of
exits through what structure
what are its 3 divisions

Answer 6

upper half of face
exits cranial through superior orbital fissure
divided into 3 branches: frontal, lacrimal, nasocilliary

Question 7

maxillary branch of trigeminal nerve
responsible for sensory innervation of
exits through what major structure
what are its 3 divisions

Answer 7

resp for sensory innerv of middle part of face
exits cranium through foramen rotundum
3 divisions: zygomatic, infraorbital, posterior superior alveolar nerves

Question 8

mandibular branch of trigeminal nerve innervates
is it sensory, motor, or both?

Answer 8

innervates muscles of mastication
only branch that is sensory AND motor
largest of the 3 divisions of trigeminal nerve

Question 9

what are the 3 origin nuclei of the trigeminal nerve?

Answer 9

mesencephalic, principal, and spinal

Question 10

mesencephalic trigeminal nucleus
innervates what group of muscles
role

Answer 10

innervates muscles of mastication
role: biting force

Question 11

spinal trigeminal nucleus
role

Answer 11

role: cough, sneeze, gag reflex

Question 12

principal trigeminal nucleus

Answer 12

sensory role: touch and pressure sensation
motor role: mastication

Question 13

trigeminal ganglion aka
location
role
clinical relevance

Answer 13

aka: Gasserian Ganglion
location: depression of temporal bone
role: dendrites carry sensation from face & axons form sensory root of trigeminal nerve
clinical relevance: this is where HSV-1 lays dormant between outbreaks