Volume 33, Issue 1 (Avicenna Journal of Clinical Medicine-Spring 2026)
Avicenna J Clin Med 2026, 33(1): 46-51 |
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Abbasi R, Najafi Vosough R, Emami S F. Effect of Stimulation Speed on Auditory Brainstem Responses in the Elderly. Avicenna J Clin Med 2026; 33 (1) :46-51
URL: http://sjh.umsha.ac.ir/article-1-3338-en.html
URL: http://sjh.umsha.ac.ir/article-1-3338-en.html
1- Department of Otorhinolaryngology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
2- Research Center for Health, Institute of Health Sciences and Technologies, Hamadan University of Medical Sciences, Hamadan, Iran
3- Department of Audiology, School of Rehabilitation Sciences, Hamadan University of Medical Sciences, Hamadan, Iran ,faranakemami742@gmail.com
2- Research Center for Health, Institute of Health Sciences and Technologies, Hamadan University of Medical Sciences, Hamadan, Iran
3- Department of Audiology, School of Rehabilitation Sciences, Hamadan University of Medical Sciences, Hamadan, Iran ,
Abstract: (21 Views)
Background and Objective: Presbycusis is a hearing disorder that develops with age. The increase in central reaction time significantly reduces the functional speed of older adults. In this regard, the present study aimed to determine the effect of stimulation speed on auditory brainstem responses (ABR) in the elderly.
Materials and Methods: This cross-sectional study included 45 adults aged 65-81 years (case group) and 45 young adults aged 18-23 years (control group). Both groups were assessed by general audiological tests and ABR at two stimulation speeds (slow=11 and fast=91 clicks per second). Data analysis was performed using independent t-test (p<0.05).
Results: At slow stimulation speed, the mean amplitudes of waves I (p=0.03) and III (p=0.04) were smaller in the old adults, compared to those in the young adults, and the difference in the mean amplitudes of wave V was not significant. The latency times of waves I-V were longer in the old adults, compared to those in the young adults (p=0.01). At the fast stimulation speed, the mean latency of waves I, III, and V increased, and the amplitude of waves I, III, and V decreased in both the old and young adults, but these differences were not significant.
Conclusion: Age-related changes appear to have a greater impact on the lower levels of the central auditory system and reduce the synchronization of auditory afferent fibers at lower levels of the brainstem. Therefore, presbycusis may have more adverse consequences on the performance of ABR wave generators at the junction of the auditory nerve and the superior olivary complex.
Materials and Methods: This cross-sectional study included 45 adults aged 65-81 years (case group) and 45 young adults aged 18-23 years (control group). Both groups were assessed by general audiological tests and ABR at two stimulation speeds (slow=11 and fast=91 clicks per second). Data analysis was performed using independent t-test (p<0.05).
Results: At slow stimulation speed, the mean amplitudes of waves I (p=0.03) and III (p=0.04) were smaller in the old adults, compared to those in the young adults, and the difference in the mean amplitudes of wave V was not significant. The latency times of waves I-V were longer in the old adults, compared to those in the young adults (p=0.01). At the fast stimulation speed, the mean latency of waves I, III, and V increased, and the amplitude of waves I, III, and V decreased in both the old and young adults, but these differences were not significant.
Conclusion: Age-related changes appear to have a greater impact on the lower levels of the central auditory system and reduce the synchronization of auditory afferent fibers at lower levels of the brainstem. Therefore, presbycusis may have more adverse consequences on the performance of ABR wave generators at the junction of the auditory nerve and the superior olivary complex.
Type of Study: Original |
Subject:
Otorhinolaryngology
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