CH44: Cranial Nerves

Question 1

largest ganglion in humans (p. 1389)

Answer 1

gasserian or semilunar ganglion

Question 2

Two fibers of gasserian ganglion (p. 1389)

Answer 2

short ascending
tactile and light pressure sensation

long descending
pain and temperature sensation

Question 3

T/F the motor portion of the fifth nerve pass through the gasserian ganglion (p. 1389)

Answer 3

F. It passes below

Question 4

The characteristic feature of trigeminal neuralgia are its paroxysmal facial pain, its laterality adn tendency to involve __ (p. 1390)

Answer 4

V2 and V3

Question 5

Trigeminal neuralgia with hemifacial spasm (p. 1391)

Answer 5

tic convulsif

Question 6

Most common cause of trigeminal neuropathy (p. 1391)

Answer 6

Trauma

Question 7

Most supercial branchews of Trigeminal nerve affected by diseases (p. 1391)

Answer 7

supratrochlear
supraorbital
infraorbital

Question 8

Sign of numbness of chin and lower lip from infiltration of the mental nerve is a sign of (p. 1391)

Answer 8

metastatic carcinoma of the breast, prostate or multiple myeloma

Question 9

Trigeminal neuralgia + paranasal sinusitis (p. 1392)

Answer 9

Spillane’s trigeminal neuralgia

Question 10

Note on CNVII palsy and taste (p. 1393)

Answer 10

It’ll depend on which area is the lesion.
If below the styloid foramen, taste is spared/ intact.
Because the chorda tympani has separated from teh main trunk of the facial nerve proximal to the styloid foramen.

If above the junction with chorda tympani but below the geniculate ganglion, all symptoms are affected includign hyperacusis.

Question 11

Virus implicated in Bell’s palsy (p. 1394)

Answer 11

HSV1

Question 12

Note on taste in Bell’s palsy (p. 1394)

Answer 12

rarely persistes beyondf the second week of paralysis

Question 13

Facial palsy + vesicular eruption in the EAC, other parts of the cranial integument and mucous membrane of the oropharynx. (p. 1395)

Answer 13

Ramsay Hunt Syndrome

TX: acyclovir, valacyclovir, famciclovir

Question 14

Bell’s palsy usually recurs in approximately how many percent of cases (p. 1394)

Answer 14

8%

Question 15

Bilateral facial palsy + parotid gland swelling from sarcoidosis (p. 1395)

Answer 15

uveoparotid fever or Heerfordt syndrome

Question 16

Triad of Melkersson-Rosenthal syndrome (p. 1395)

Answer 16

recurrent facial paralysis
facial or labial edema
plication of the tongue

Question 17

Disappearance of the fat in teh dermal and SC tissues on one or both sides of the face giving an appearance of facial palsy (p. 1396)

Answer 17

Parry- romberg syndrome

Question 18

Gustatory swearing of the cheek and upper lip following an injury to parasympathetic innervation (p. 1396)

Answer 18

Frey syndrome

Question 19

conegital synkinesis of the motor trigeminal fibers and branches of favial nerve (p. 1396)

Answer 19

Wartenberg or inverse Marcus- Gunn sign

Question 20

EMG pattern of facial myokimia (p. 1397)

Answer 20

spontaenous asynchronous discharge of adjacent motor units, appearing singly or in doublets or triplets at a rate varying from 30 to 70 cycles per second.

Question 21

Unilateral stabbing pain localized to or one side of the root of the tongue and throat (p. 1397)

Answer 21

glossopharyngeal neuralgia

Question 22

Two ganglia of vagus (p. 1398)

Answer 22

jugular
cell bodies of the somatic sensory nerves

nodose
cellbodies of the afferent fibers of the pharynx, larynx, trachea and esophagus and thoracic and abdominal viscera

Question 23

2 motor nuclei of vagus 9p. 1398)

Answer 23

nucleus ambiguus

dorsal motor nucleus

Question 24

What is the Semon’s law (p. 1399)

Answer 24

With partial lesions, movements of abduction are affected more than adduction.

Question 25

Vagus lesion. Where does the uvula lateralize (p. 1399)

Answer 25

To the normal side on phonation

Question 26

Most common cause of bilaterally atrophic and fasciculating tongue (p. 1400)

Answer 26

Motor neuron disease

Question 27

similtaneous occurence of nuchal- occipital pain and ipsilateral numbness of the tongue provoked by the sudden sharp tirning of the head (p. 1400

Answer 27

neck- tongue syndrome

Question 28

Successive involvement of all cranial nerves on one side (p. 1401)

Answer 28

Garcin syndrome

Question 29

Tongue muscles and movement (p. 1400)

Answer 29

genioglossus: protrusion
styloglossus: retracts and elevates its roots
hypoglssus: make upper part convex