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Information Journal Paper

Title

Morphology variations of click-evoked auditory brainstem response with low and high rate stimuli in rat

Pages

  22-27

Abstract

 Background and Aim: The auditory brainstem response (ABR) is one of the most common obj-ective hearing tests conducting in animal and human. The purpose of this study was evalua-ting the morphology variations of ABR wave-forms in rats with low and high rate click sti-muli. Methods: First, rats with ABR thresholds hig-her than 55 dB SPL were excluded and total 81 ears remained in study. Absolute and interpeak latencies of wave I, II, IV were evaluated at low (17. 7 Hz) and high rate (88. 7 Hz) for click sti-muli at 120 dB SPL. Results: At low rate stimuli, ABR waveforms showed different morphologies. The most com-mon complex for waves II to IV was wave III placed on downward slope of wave II (71% of cases). Almost the same morphologies were seen at higher rate; but in some waves, it rou-nded and decreased amplitude. For waves IV-V, the most common morphology was equal amp-litude of wave IV and V in low and high rates (35% vs 56%, respectively). Generally, the high rate stimuli didn’ t severely change morphology patterns except for later waves. Conclusion: Normal click-evoked ABR could result in different waveforms. Using click sti-muli at low and high rate result in different mor-phology patterns. Recognizing morphology var-iations of ABR waveforms are essential for det-ecting any pathological conditions. The high rate stimuli increased latencies, especially for later waves.

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    APA: Copy

    JAFARZADEH, SADEGH, & POURBAKHT, AKRAM. (2019). Morphology variations of click-evoked auditory brainstem response with low and high rate stimuli in rat. AUDITORY AND VESTIBULAR RESEARCH, 28(1), 22-27. SID. https://sid.ir/paper/716696/en

    Vancouver: Copy

    JAFARZADEH SADEGH, POURBAKHT AKRAM. Morphology variations of click-evoked auditory brainstem response with low and high rate stimuli in rat. AUDITORY AND VESTIBULAR RESEARCH[Internet]. 2019;28(1):22-27. Available from: https://sid.ir/paper/716696/en

    IEEE: Copy

    SADEGH JAFARZADEH, and AKRAM POURBAKHT, “Morphology variations of click-evoked auditory brainstem response with low and high rate stimuli in rat,” AUDITORY AND VESTIBULAR RESEARCH, vol. 28, no. 1, pp. 22–27, 2019, [Online]. Available: https://sid.ir/paper/716696/en

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