Download Vestibulocochlear (VIII) Nerve

Vestibulocochlear (VIII) Nerve
Vestibulocochlear (VIII) Nerve
Vestibulocochlear (VIII) Nerve
Unilateral sensorineural deafness tinnitus
loud noise
acoustic neuroma
Ménière's disease
brainstem CVA
Pagets disease
lead
Herpes zoster
aminoglycosides
neurofibroma
furosemide & aspirin
Vestibulocochlear (VIII) Nerve
vestibular symptoms
vertigo is an illusion of motion
in the form of a spinning or
whirling sensation) It may be
associated with Nausea,
vomiting, oscillopsia
• The presence of associated
unilateral hearing loss and
tinnitus or fullness in the ear
suggests ear pathology.
• Signs and symptoms
referable to the brainstem,
CNs, or cerebellum are
indicative of a central lesion
Oculocephalic reflex
Nystagmus
To and fro movement of the eye due to defective
control system of vision.
 Jerk
 Pendular
Vertigo
Physiologic
Pathologic
Visual
Seasickness
Cerebellar
Vestibular (Labyrinthine)
Extreme
extension
Unilateral
spin
Bilateral
• Labyrinthitis
• Trauma
• Ischemia
• Alcohol
• drugs
Benign paroxysmal position
vertigo
Recurrent
intense
dizziness with
a spinning
sensation and
unsteadiness
when moving
the head in
certain
directions
(recumbent
head position)
• Nystagmus (in supine with
the head turned to the
affected ear
Causes
• tiny fragments of debris in the
inner ear labyrinth
• drug
• strokes
• tumors
Benign paroxysmal position
vertigo
Nystagmus
central
Latency
peripheral
3 – 40 sec immediat
e
Fatigability
yes
no
Habituation
yes
no
direction
uindirecti indirectio
on
n
vertical
never
May be
Visual fixation
Inhibits
vertigo
Not
inhibited
Benign paroxysmal position vertigo
Epley maneuver
Treatment
Antihistamine (meclizine,
prmethazine)
Benzodiazepine(diazepam,
clonazepam)
Phenathiazines
(prochlorperazine