Audiologic Assessment & Diagnosis Flashcards
7 cards from real ABA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Audiologic Assessment & Diagnosis flashcards as text
The 'plateau' method in masking is used to identify the correct masked threshold. The plateau is defined as a stable threshold across a masking noise increase of at least:
Answer: 20 dB
A masking plateau is confirmed when threshold remains stable across at least a 20 dB increase in effective masking level, indicating true masked threshold.
Which vestibular assessment finding is expected in a patient with acute unilateral vestibular neuritis?
Answer: Unilateral caloric weakness on the affected side
Vestibular neuritis typically causes a unilateral caloric weakness (reduced or absent response) on the side of the affected superior vestibular nerve.
Which finding would indicate a peripheral (vs. central) vestibular lesion based on spontaneous nystagmus characteristics?
Answer: Horizontal nystagmus that is inhibited by visual fixation
Peripheral vestibular nystagmus is horizontal-torsional and is inhibited by visual fixation, unlike central nystagmus which is not suppressed by fixation.
The P300 event-related potential is primarily used to evaluate:
Answer: Cognitive processing and attention to auditory stimuli
The P300 is an endogenous, cognitive event-related potential reflecting auditory attention and working memory processing rather than peripheral hearing.
Which condition is characterized by fluctuating low-frequency sensorineural hearing loss, aural fullness, tinnitus, and episodic vertigo?
Answer: Meniere's disease
Meniere's disease presents with the classic tetrad of episodic vertigo, fluctuating low-frequency SNHL, tinnitus, and aural fullness due to endolymphatic hydrops.
In newborn hearing screening, an automated ABR (aABR) screen that passes indicates:
Answer: Neural synchrony at the level of the brainstem is within normal limits at screening levels
A passing aABR indicates adequate neural synchrony at brainstem level at the screening intensity, but does not rule out all types of hearing loss.
Cervical vestibular evoked myogenic potentials (cVEMPs) assess the integrity of which structure?
Answer: Saccule and inferior vestibular nerve
cVEMPs are generated by the saccule and travel via the inferior vestibular nerve to the sternocleidomastoid muscle, assessing sacculo-collic pathway integrity.