CNs, Nerve roots, Derma/Myotomes

Question 1

Cranial nerve I

Answer 1

olfactory
Afferent
smell
(+) inability to ID order like chocolate

Question 2

Cranial nerve II

Answer 2

optic
Afferent
Sight
(+) Inability to ID objects at a reasonable distance like a eye chart

Question 3

Cranial nerve III

Answer 3

oculomotor
Efferent
Motor control of superior, medial and lateral recti, inferior oblique mus of eyeball
(+) tracking deficit, asymmetry, ptosis
“H” pattern to test vert, medial, and diagonal eye movement
Light reaction

Question 4

Cranial nerve IV

Answer 4

trochclear
Efferent
superior oblique mus of eyeball
(+) inability to follow inferior direction traced by utensil, diplopia

Question 5

Cranial nerve V

Answer 5

Trigeminal
-Afferent (Touch and pain of the facial skin nose mucous membrane sinuses mouth and anterior tongue)
-Efferent (Muscles of mastication)
(+) unable to ID pin/cotton on face or move jaw through positions of protrusion retrusion and lateral deviation

Question 6

Cranial nerve VI

Answer 6

Abducens
Efferent
(+) Inability to track eyes outward into ABD

Question 7

Cranial nerve VII

Answer 7

Facial
Afferent (taste)
Efferent (Facial muscles, lacrimal submandibular and sublingual glands)
(+) unable to make a funny face; puff cheeks out, or taste

Question 8

Cranial nerve VIII

Answer 8

Vestibulocochlear
Afferent (Hearing and balance)
(+) Unable to hear ticking watch from 18-24 in. or sig bilateral diff, unable to hear webber and rinne tunning forl test, balance deficit

Question 9

Cranial nerve IX

Answer 9

Glossopharyngeal
Afferent (touch, pain and taste of the posterior tongue)
Efferent (Muscles of the pharynx autonomic parotid gland)
(+) inability to taste on posterior 1/3 of the tounge, esp bitter, unable to gag or no feeling of tounge depressor on pharynx, inability to swallow

Question 10

Cranial nerve X

Answer 10

Vagus
Afferent ( touch and pain of the pharynx, larynx and bronchi)
Efferent (muscles of palate, pharynx, larynx, autonomic control of viscera)
(+) inability to gag or say “AHHH”

Question 11

Cranial nerve XI

Answer 11

Spinal accsessory
Efferent (SCM, traps control)
(+) inability to resist shoulder shrug

Question 12

Cranial nerve XII

Answer 12

hypoglossal
Efferent muscles of tongue
(+) cant stick out tongue or it deviates to 1 side