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Intrasubject variability in the absolute latency of the auditory brainstem response.
R F Oyler1, J L Lauter, N D Matkin
1Department of Communication Sciences and Disorders, Radford University, VA 24142.
Journal of the American Academy of Audiology
|October 1, 1991
Summary
This study investigated intrasubject variability in auditory brainstem response (ABR) peak latencies. Findings show typically normal latency distributions with less variability than group data, suggesting potential for increased ABR sensitivity in monitoring applications.
Area of Science:
- Audiology
- Neuroscience
- Clinical Research
Background:
- Auditory Brainstem Response (ABR) peak latency is crucial for clinical applications.
- Current ABR analysis often assumes met variability assumptions.
- Intersubject variability of ABR latency is known, but intrasubject variability is under-researched.
Purpose of the Study:
- To characterize the intrasubject variability of ABR peak latencies in a clinical context.
- To provide data on the consistency of ABR measurements within individuals.
Main Methods:
- Nine male subjects (10-12 years old) participated.
- Five ABR recordings were obtained per subject across four sessions.
- Stimuli: 100 µs condensation clicks at 80 dB nHL.
- Analysis of intrasubject latency distributions for each ABR peak.
Main Results:
- Intrasubject variability in ABR latency was observed in all participants.
- Latency distributions were typically normal.
- The magnitude of intrasubject variability was generally smaller than reported intersubject variability.
Conclusions:
- Establishing individual ABR latency baselines is feasible.
- Understanding intrasubject variability can enhance ABR sensitivity for specific monitoring tasks.
- This research addresses a gap in knowledge regarding ABR test-retest reliability.