Using patient friendly language, you tell a patient with BPPV that their crystals are displaced. What is the
physiologic term for crystals/debris - AnswersOtoliths/otoconia
displaced from utricle to one of the semi-circular canals
The utricle detects linear acceleration (horizontally/vertically) - AnswersHorizontally
saccule: vertically
T/F Semi-circular canals depend on gravity-based stimuli - AnswersF
velocity dependent with head movements
BPPV most commonly affects the __ Canal - AnswersPosterior
What vestibular pathology is the most common cause of vertiginous symptoms? - AnswersBPPV
BPPV is diagnosed by: - Answerspositive Dix-Hallpike
canal specific
What do you call the period of time before the onset of nystagmus but after placing the pt in the
diagnostic position? - AnswersLatency
After a 4 second latency period, you observe torsional nystagmus with fast phase directions of up and to
the right. What canal is affected? - AnswersR Posterior
What directions of nystagmus should you observe to diagnose Right anterior canalithiasis? -
AnswersRight torsion, down beating.
What is the most common comorbidity observed in those with BPPV according to the cohort study
provided in this course? - AnswersHTN
What are the 3 most common comorbidities observed in those with BPPV according to the cohort study
provided in this course? - AnswersHTN, Migraine, and Head Concussion
(in that order)