Lack of association between transiently evoked otoacoustic emission amplitude and experimentation linked-factors (repeated acoustic stimulation, cerebrospinal fluid pressure, supine and sitting positions, alertness level).
Changes in transiently evoked otoacoustic emissions (TEOAEs) occur during sleep and during tasks requiring attention. This can be due to a central nervous system effect on the cochlea. But, an additional or dominant influence by non-controlled factors is possible. In this paper, the effect of click-stimulus repetition, lying and sitting positions, state of alertness (awake or asleep) and CSF pressure variation on TEOAE features were studied. None of these factors affected TEOAE amplitude. In 2 subjects, TEOAE amplitude increased considerably during the night while remaining stable in 7 subjects during daytime sleep. This may be due to circadian variations of TEOAE amplitude.
Froehlich
P
P
URA CNRS 1447 Physiologie sensorielle Audition et Voix, Hôpital E. Herriot, Lyon, France.
Ferber
C
C
Remond
J
J
Jaboulay
J M
JM
Morgon
A
A
Duclaux
R
R
Collet
L
L
D000161:Acoustic Stimulation; D000328:Adult; D001288:Attention; D015170:Cerebrospinal Fluid Pressure / Q000502:physiology*; D003051:Cochlea / Q000502:physiology; D005260:Female; D006309:Hearing / Q000502:physiology*; D006801:Humans; D008297:Male; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology; D017286:Polysomnography; D011187:Posture; D012890:Sleep; D016683:Supine Position