CH44: Cranial Nerves Flashcards
largest ganglion in humans (p. 1389)
gasserian or semilunar ganglion
Two fibers of gasserian ganglion (p. 1389)
short ascending
tactile and light pressure sensation
long descending
pain and temperature sensation
T/F the motor portion of the fifth nerve pass through the gasserian ganglion (p. 1389)
F. It passes below
The characteristic feature of trigeminal neuralgia are its paroxysmal facial pain, its laterality adn tendency to involve __ (p. 1390)
V2 and V3
Trigeminal neuralgia with hemifacial spasm (p. 1391)
tic convulsif
Most common cause of trigeminal neuropathy (p. 1391)
Trauma
Most supercial branchews of Trigeminal nerve affected by diseases (p. 1391)
supratrochlear
supraorbital
infraorbital
Sign of numbness of chin and lower lip from infiltration of the mental nerve is a sign of (p. 1391)
metastatic carcinoma of the breast, prostate or multiple myeloma
Trigeminal neuralgia + paranasal sinusitis (p. 1392)
Spillane’s trigeminal neuralgia
Note on CNVII palsy and taste (p. 1393)
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.
Virus implicated in Bell’s palsy (p. 1394)
HSV1
Note on taste in Bell’s palsy (p. 1394)
rarely persistes beyondf the second week of paralysis
Facial palsy + vesicular eruption in the EAC, other parts of the cranial integument and mucous membrane of the oropharynx. (p. 1395)
Ramsay Hunt Syndrome
TX: acyclovir, valacyclovir, famciclovir
Bell’s palsy usually recurs in approximately how many percent of cases (p. 1394)
8%
Bilateral facial palsy + parotid gland swelling from sarcoidosis (p. 1395)
uveoparotid fever or Heerfordt syndrome
Triad of Melkersson-Rosenthal syndrome (p. 1395)
recurrent facial paralysis
facial or labial edema
plication of the tongue
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)
Parry- romberg syndrome
Gustatory swearing of the cheek and upper lip following an injury to parasympathetic innervation (p. 1396)
Frey syndrome
conegital synkinesis of the motor trigeminal fibers and branches of favial nerve (p. 1396)
Wartenberg or inverse Marcus- Gunn sign
EMG pattern of facial myokimia (p. 1397)
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.
Unilateral stabbing pain localized to or one side of the root of the tongue and throat (p. 1397)
glossopharyngeal neuralgia
Two ganglia of vagus (p. 1398)
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
2 motor nuclei of vagus 9p. 1398)
nucleus ambiguus
dorsal motor nucleus
What is the Semon’s law (p. 1399)
With partial lesions, movements of abduction are affected more than adduction.
Vagus lesion. Where does the uvula lateralize (p. 1399)
To the normal side on phonation
Most common cause of bilaterally atrophic and fasciculating tongue (p. 1400)
Motor neuron disease
similtaneous occurence of nuchal- occipital pain and ipsilateral numbness of the tongue provoked by the sudden sharp tirning of the head (p. 1400
neck- tongue syndrome
Successive involvement of all cranial nerves on one side (p. 1401)
Garcin syndrome
Tongue muscles and movement (p. 1400)
genioglossus: protrusion
styloglossus: retracts and elevates its roots
hypoglssus: make upper part convex
