Browsing by Author "Erbek, Seyra H."

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Clinical Interpretation of Positional Nystagmus Provoked by both Dix-Hallpike and Supine Head-Roll Tests
(2022) Hizal, Evren; Jafarov, Sabuhi; Erbek, Seyra H.; Ozluoglu, Levent N.; 35894530
BACKGROUND: Both the Dix-Hallpike test and the supine head-roll test can provoke positional nystagmus in a group of benign paroxysmal positional vertigo patients, including but not limited to those with multiple canal involvement. This study aimed to determine the incidence and interpret the clinical significance of positional nystagmus provoked by both the Dix-Hallpike and the supine head-roll tests. METHODS: The results of video-nystagmography sessions recorded in the computer database that included both the Dix-Hallpike and the supine head-roll tests were examined. RESULTS: The records belonging to 2880 video-nystagmography sessions of 2387 patients were examined. Nystagmus was detected in both the Dix-Hallpike and the supine head-roll tests of 131 (5.5%) patients. The video images belonging to 142 session records of 122 patients were accessed and further analyzed. The diagnosis was posterior canal BPPV in 9.0%, and lateral canal BPPV in 62.3%. More than one canal was involved in 3.3%, one rehabilitation maneuver was performed in 75.0%, and recurrence was observed in 7.4% of those patients. CONCLUSION: In both geotropic and apogeotropic variants of lateral canal BPPV, nystagmus can be observed during the Dix-Hallpike test in addition to the supine head-roll test. In patients with posterior canal benign paroxysmal positional vertigo, nystagmus can also be observed in the head-roll test. To reach a correct and comprehensive diagnosis and apply appropriate treatment in benign paroxysmal positional vertigo, the Dix-Hallpike test and the head-roll test should be completely performed on both sides, and the results of those tests must be interpreted concomitantly.
The Middle Ear Functions and Vestibular-Evoked Potentials in Springboard-Platform Diving Children
(2023) Borisova, Natalia; Ozer, Fulya; Kuntman, Berna Deniz; Erbek, Seyra H.; 0000-0002-8453-6069; 0000-0003-0038-8167; AAJ-2445-2021; JNE-6747-2023
Objective: To examine the middle ear and Eustachian tube functions of children who perform springboard and platform diving sports professionally and to evaluate the vestibulospinal and vestibuloocular reflexes of these athletes with evoked myogenic potentials.Methods: Two groups consist of athletes and a control group. Pure tone audiometry and speech audiometry, Eustachian tube function test and resonance frequency in multifrequency tympanometry, and ocular/cervical vestibular-evoked myogenic potentials were performed in all participants.Results: Forty-five ears in 25 athletes were evaluated as non-patent Eustachian tube. In athlete girls, resonance frequency mean value was measured lower than the control group in both ears. Cervical vestibular-evoked myogenic potentials amplitude mean values were statistically lower in athlete girls in the left ear (P = .031), and ocular vestibular-evoked myogenic potentials amplitude mean values were statistically higher in athlete boys in the left ear (P = .024). Conclusions: Repeated diving from very high meters platform did not cause significant difference on resonance frequency of the middle ear, but cause frequently common Eustachian tube dysfunction. Acrobatic movements on the air before the diving caused changes in ocular/cervical vestibular-evoked myogenic potentials amplitude values of athletes. Eustachian tube function should be followed at different times of the year to see any effect on the performance of this sport. The importance of the vestibular system and the medial vestibulospinal tract in spring-board and platform diving athletes was emphasized first in this study. To monitor health of vestibular system and middle ear with different and more specific test materials may be important for their longer professional careers. However, this issue should be proven with future studies.