The Journal of International
Advanced Otology
Original Article

P1-N1-P2 Cortical Auditory Evoked Potentials in Chronic Unilateral Acquired Conductive Hearing Loss in Adults


Department of Otolaryngology, Audiological Medicine Professor of Audio-Vestibular Medicine, Audiology Unit, Kasr-Al-Ainy Faculty of Medicine, Cairo University, Egypt


Department of Otolaryngology, Resident in the Audio-Vestibular Unit, Ain-Shams General Hospital, Ministry of Health, Cairo, Egypt


Department of Otolaryngology, Assistant Professor of Otolaryngology, Kasr-Al-Ainy Faculty of Medicine, Cairo University, Egypt

J Int Adv Otol 2024; 20: 216-224
DOI: 10.5152/iao.2024.231270
Read: 405 Downloads: 110 Published: 23 May 2024

BACKGROUND: Chronic unilateral hearing loss causes imbalanced auditory input to the brain that triggers cortical reorganization. The effect of sensorineural hearing loss on the central auditory system (CAS) has been thoroughly studied, while there is a paucity of research on the effect of conductive hearing loss (CHL). The aim of this study was to assess the P1-N1-P2 cortical auditory evoked response potential (CAEP) in adult individuals with chronic acquired unilateral CHL.

METHODS: This study included 108 participants of both genders: 54 patients with unilateral chronic CHL who were compared to well-matched 54 controls. All were subjected to history-taking, otologic examination, basic audiological evaluation, and bone conduction N1-P2 CAEP.

RESULTS: The affected ears of the cases showed highly statistically significant shorter CAEPs N1, P2, N1-P2 latencies but not P1, and showed highly statistically significant larger N1, P2, N1P2, amplitude than the control group. Latencies decreased and amplitudes increased as the degree of CHL increased, but were not affected by patients’ age, side, or duration of the CHL. Cases with tinnitus had statistically significant and worse results than those without tinnitus.

CONCLUSION: Unilateral chronic CHL might enhance neurocortical plasticity, with greater changes occurring at greater degrees of the CHL.

Cite this article as: Dabbous AO, Hosni NA, Emara AAO, El-Antably AS. P1-N1-P2 cortical auditory evoked potentials in chronic unilateral acquired conductive hearing loss in adults. J Int Adv Otol. 2024;20(3):216-224.

EISSN 2148-3817