Common cranial nerve lesions Flashcards Preview

A - Board Reveiew Misc > Common cranial nerve lesions > Flashcards

Flashcards in Common cranial nerve lesions Deck (9)
1

CN V motor lesions

Jaw will deviate toward the side of the lesion due to unopposed force on the opposite pterygoid muscle.

2

CN X lesions

Uvula will deviate away from the side of the lesion
the weak side collapses and uvula points away

3

CN XI lesions

Weakness during turning the head toward the contralateral side of the lesion (SCM)

Shoulder drop on the side of the lesion (trapezius)

**The left SCM contracts to turn the head to the right.

4

wHICH NERVES PASS THROUGH THE CAVERNOUS SINUS?

CN III, IV, V1 and VI

AKA all the nerves that control the eye and V1

Pituitary tumors can effect this area.
CN 6 most commonly effected.

5

Which portion of the ear can the ear bones be found?

Middle ear.
Amplifys sound from eardrum to inner ear.

6

UMN lesion to facial nerve

Contralateral paralysis of the lower face, forehead spared because bilateral UMN innervation.

7

LMN lesion to facial nerve

ipsilateral paralysis of upper and lower face.

Only the UMN supplies double innervation to forehead.

8

What are the mastication muscles?

Which close and which open?

Masseter
Temporalis
Medial ptyrigoid all close

(only the lateral ptyrigoid opens)

9

which area of the eye is the bind spot and which has a bunch of sensors?

The optic disc is blindspot

The fovea is the light sensitive area.

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