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Updated: Apr 28, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Vocalization-induced stapedius contraction.

James W Rainsbury1, Margaret Aron, Duncan Floyd

  • 1*Division of Otolaryngology, Dalhousie University, Halifax, Nova Scotia, Canada †Derriford Hospital, Plymouth, Devon, U.K.; ‡Division of Otolaryngology, Dalhousie University, Halifax; and §Nova Scotia Hearing and Speech Centers, Dalhousie University, Nova Scotia, Canada.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|June 4, 2014
PubMed
Summary
This summary is machine-generated.

Visible stapedius muscle contraction during vocalization was observed in a patient. This uncommon finding highlights gaps in understanding non-auditory stapedius reflex pathways.

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Auditory Physiology

Background:

  • The stapedius muscle, innervated by the facial nerve, typically contracts in response to sound (acoustic reflex).
  • Non-auditory activation of the stapedius muscle is less understood.
  • Chronic suppurative otitis media can affect middle ear structures, including the stapes.

Observation:

  • A case of a 51-year-old woman with a history of chronic suppurative otitis media and type III myringostapediopexy is presented.
  • Incidental observation of stapes head movement during vocalization via otoendoscopy.

Findings:

  • Endoscopic visualization confirmed stapes head movement correlating with vocalization.
  • This movement was not detected during tympanometric measurements, suggesting a specific non-auditory pathway activation.

Implications:

  • This case demonstrates a rare instance of visible stapedius contraction triggered by voice.
  • Further research is needed to elucidate the non-auditory neural pathways influencing stapedius muscle activity.
  • Understanding these pathways may offer insights into vocalization-related middle ear dynamics.