Ch. 16 Dizziness and Vertigo

Question 1

What is the features of acute vestibular syndrome?

Answer 1

Dizziness of sudden onset, persistent, lasting more than a day, with nausea or vomiting, gait disturbance, nystagmus, intolerance to head motion

Question 2

What systems are involved in helping the body maintain equilibrium and determine its location in space?

Answer 2

Visual
Proprioception
Vestibular

Mismatched information from any of these symptoms leads to vertigo

Question 3

What is the presumed cause of BPPV?

Answer 3

Otoliths break free and get into the vestibular canals causing positional vertigo

Question 4

What is the usual physiologic cause of nystagmus?

Answer 4

Imbalance between the usually synchronized signals from the two vestibular systems, therefore, nystagmus usually comes from unilateral vestibular disease causing imbalance of the rectus muscles of the eye

Question 5

What is the pathophysiology of vestibular neuritis/labyrinthitis?

Answer 5

Inflammation of the vestibular nerve

Question 6

What is the pathophysiology of Meniere’s Disease?

Answer 6

Endolymphatic hydrops (too much endolymph)