Cranial Nerves Flashcards
1
Q
I
A
Olfactory
SENSORY
- smell (no thalamic relay)
- Cribiform plate
2
Q
II
A
Optic
SENSORY
- sight
- thru optic canal w/ opthalmic artery
3
Q
III
A
Oculomotor
MOTOR
- all extra-ocular muscles except LR/SO
- pupil constriction (sphincter pupillae - EWN, muscarinic)
- Accommodation
- Levator palpebrae (opens eyelid)
- Out superior orbital fissure
*** affected by uncal herniation of medial temporal through tentorium
4
Q
IV
A
Trochlear
MOTOR
- superior oblique
- Out superior orbital fissure (exits dorsally then comes around)
5
Q
V
A
Trigeminal
SENSORY AND MOTOR
V1 - (sup orbital fissure) opth sensation; afferent of cornea reflex)
V2 - (rotundum) maxillary sensation
V3 - (ovale) mandibular sensation
-Also somatosensory of anterior 2/3 tongue and musc of mastication
6
Q
VI
A
Abducens
MOTOR
- Lateral rectus
- Out superior orbital fissure
7
Q
VII
A
Facial
SENSORY AND MOTOR
- Facial movement/expression
- Anterior 2/3 taste
- Lacrimation, salivation (submandibular and sublingual)
- Eyelid closing (efferent arm of cornea reflex)
- Stapedius
- Out internal auditory meatus
8
Q
VIII
A
Vestibulocochlear
SENSORY
- Hearing and balance
- Out internal auditory meatus
9
Q
IX
A
Glossopharyngeal
SENSORY AND MOTOR
- Taste and sensation of posterior 1/3 tongue
- Swallowing
- Lacrimation (parotid)
- Carotid sinus receptors
- Stylopharnygeus (elevation of pharynx/larynx)
- Out jugular foramen
10
Q
X
A
Vagus
SENSORY AND MOTOR
- Supraglottic taste
- Swallowing
- Palate elevation
- Uvula midline
- Talking (larynx)
- Cough reflex
- Aortic arch receptors
- Out jugular foramen
11
Q
XI
A
Accessory
MOTOR
- SCM and trapezius
- Spinal root goes in thru foramen magnum then back out jugular foramen
12
Q
XII
A
Hypoglossal
MOTOR
- Tongue muscles
- Out hypoglossal canal
