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Alteration in auditory function during the ovarian cycle.

Deena Al-Mana1, Borka Ceranic, Ovrang Djahanbakhch

  • 1Department of Neuro-otology, The National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, United Kingdom.

Hearing Research
|August 6, 2010
PubMed
Summary
This summary is machine-generated.

Hormonal fluctuations during the ovarian cycle (OC) subtly alter auditory function. This study found changes in otoacoustic emissions (OAEs), medial olivocochlear (MOC) suppression, and auditory brainstem responses (ABRs), suggesting increased hearing sensitivity around ovulation.

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Audiology

Background:

  • The ovarian cycle (OC) involves significant hormonal fluctuations.
  • The impact of these hormonal changes on auditory function remains incompletely understood.

Purpose of the Study:

  • To investigate the association between physiological variations in ovarian hormones during the OC and changes in auditory function.
  • To explore how oestradiol and progesterone levels influence otoacoustic emissions (OAEs), medial olivocochlear (MOC) suppression, and auditory brainstem responses (ABRs).

Main Methods:

  • Sixteen women with normal hearing were monitored throughout their OC.
  • Auditory tests including OAEs, MOC suppression, and ABRs were performed simultaneously with hormone level measurements.
  • The OC phases were determined by serum oestradiol, progesterone levels, and menstrual cycle dating.

Main Results:

  • A significant spontaneous OAE frequency shift was observed, peaking in the late follicular phase (highest oestrogen).
  • Medial olivocochlear (MOC) suppression and auditory brainstem responses (ABRs) wave V latency showed significant changes during the OC.
  • Positive correlations were found between TEOAEs, ABRs, and oestradiol levels; negative correlation between MOC suppression and oestradiol.

Conclusions:

  • Physiological variations in ovarian hormones during the OC are associated with subtle but significant changes in auditory function.
  • Results suggest a potential increase in hearing sensitivity around the time of ovulation.
  • Further research is warranted to elucidate the mechanisms underlying these hormone-auditory interactions.