Jerin, Claudia; Wakili, Reza; Kalla, Roger; Gürkov, Robert (2015). The Effect of Increasing Intracranial Pressure on Ocular Vestibular-Evoked Myogenic Potential Frequency Tuning. Ear and hearing, 36(6), e336-e341. Lippincott Williams & Wilkins 10.1097/AUD.0000000000000190
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OBJECTIVE
Ocular vestibular-evoked myogenic potentials (oVEMPs) represent extraocular muscle activity in response to vestibular stimulation. The authors sought to investigate whether posture-induced increase of the intracranial pressure (ICP) modulated oVEMP frequency tuning, that is, the amplitude ratio between 500-Hz and 1000-Hz stimuli.
DESIGN
Ten healthy subjects were enrolled in this study. The subjects were positioned in the horizontal plane (0 degree) and in a 30-degree head-downwards position to elevate the ICP. In both positions, oVEMPs were recorded using 500-Hz and 1000-Hz air-conducted tone bursts.
RESULTS
When tilting the subject from the horizontal plane to the 30-degree head-down position, oVEMP amplitudes in response to 500-Hz tone bursts distinctly decreased (3.40 μV versus 2.06 μV; p < 0.001), whereas amplitudes to 1000 Hz were only slightly diminished (2.74 μV versus 2.48 μV; p = 0.251). Correspondingly, the 500/1000-Hz amplitude ratio significantly decreased when tilting the subjects from 0- to 30-degree inclination (1.59 versus 1.05; p = 0.029). Latencies were not modulated by head-down position.
CONCLUSIONS
Increasing ICP systematically alters oVEMPs in terms of absolute amplitudes and frequency tuning characteristics. oVEMPs are therefore in principle suited for noninvasive ICP monitoring.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology |
UniBE Contributor: |
Kalla, Roger |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
0196-0202 |
Publisher: |
Lippincott Williams & Wilkins |
Language: |
English |
Submitter: |
Romina Theiler |
Date Deposited: |
02 May 2016 12:34 |
Last Modified: |
05 Dec 2022 14:55 |
Publisher DOI: |
10.1097/AUD.0000000000000190 |
PubMed ID: |
26502192 |
BORIS DOI: |
10.7892/boris.81586 |
URI: |
https://boris.unibe.ch/id/eprint/81586 |
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