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Effect of White Noise 'Masking' on Vestibular Evoked Potentials Recorded Using Different Stimulus Modalities
- Source :
- Acta Oto-Laryngologica. 119:311-315
- Publication Year :
- 1999
- Publisher :
- Informa UK Limited, 1999.
-
Abstract
- Short latency vestibular evoked potentials (VsEPs) to linear acceleration impulses (L-VsEPs) are initiated in the otolith organs (saccule and utricle). Some of the saccule afferents have been reported to respond not only to linear acceleration, but also to high intensity acoustic stimuli. If so, the L-VsEP recorded from the saccule (elicited with the stimulus orientated relative to the head so as to optimally activate the saccule, i.e. stimulus in the vertical plane, Z-VsEP) should be reduced during high intensity broad band noise (BBN) "masking". Conversely, the utricular afferents have been reported to be less auditory-sensitive. Therefore, an L-VsEP which is mainly utricular in origin (stimulus in the horizontal plane, X-VsEP) should be less affected by this noise "masking". This was investigated in rats by recording X-VsEPs and Z-VsEPs and angular VsEPs (A-VsEPs), originating in the lateral semi-circular canals, before, during and after exposure to short duration, high intensity (113 dB SPL) BBN. This intensity completely masked auditory nerve evoked responses. The Z-VsEP did appear to be slightly more affected by the noise "masking" than the X-VsEP, implying the presence of more auditory-sensitive elements in the saccule. The A-VsEP was also affected by the BBN. The overall effect was relatively small (on average, 10-25% depression of the first wave of the different VsEPs). The responses showed recovery 5 min later.
- Subjects :
- Male
Physics
medicine.medical_specialty
Angular acceleration
Vertical plane
General Medicine
Vestibulocochlear Nerve
Audiology
Stimulus (physiology)
Horizontal plane
Rats
Otolithic Membrane
medicine.anatomical_structure
Otorhinolaryngology
Vestibule
Utricle
Evoked Potentials, Auditory
medicine
Animals
Vestibule, Labyrinth
sense organs
Saccule
Noise
Perceptual Masking
Otolith
Subjects
Details
- ISSN :
- 16512251 and 00016489
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- Acta Oto-Laryngologica
- Accession number :
- edsair.doi.dedup.....8c720cd0892a17afa1e9552b587f0edf