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Related Experiment Videos

Vestibular function in Belgian Waterslager canaries (Serinus canarius)

S M Jones1, B M Ryals, S Colbert

  • 1Department of Surgery, University of Missouri School of Medicine, Columbia 65212, USA. sjones@surgery.missouri.edu

Hearing Research
|July 31, 1998
PubMed
Summary

Belgian Waterslager canaries show altered vestibular function, with higher response thresholds and reduced amplitudes in vestibular evoked potentials (VsEPs). Morphological analysis revealed disordered stereociliary bundles in their saccules, suggesting a link to functional deficits.

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Area of Science:

  • Neuroscience
  • Auditory and Vestibular Science
  • Avian Biology

Background:

  • The Belgian Waterslager canary is known for its unique vocalizations, but its sensory functions, particularly vestibular, are less understood.
  • Vestibular evoked potentials (VsEPs) are a valuable tool for assessing vestibular neural function.

Purpose of the Study:

  • To measure and compare vestibular function in Belgian Waterslager canaries and non-Waterslager controls using VsEPs.
  • To investigate the underlying morphological correlates of any observed functional differences in the vestibular system.

Main Methods:

  • Vestibular function was assessed using short latency vestibular evoked potentials (VsEPs) elicited by linear acceleration.
  • Responses were recorded using vertex to mastoid leads and signal averaging.

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  • Scanning electron microscopy was used to examine cochlear and vestibular organs, focusing on saccular hair cell stereociliary bundles.

    • Main Results:

    • Belgian Waterslager canaries exhibited significantly higher VsEP thresholds and reduced response amplitudes compared to controls.
    • No significant differences were found in VsEP peak latencies.
    • Scanning electron microscopy revealed a striking lack of common orientation in the stereociliary bundles of saccular hair cells in Waterslager canaries.

    Conclusions:

    • Vestibular neural function, as measured by VsEPs, is demonstrably affected in Belgian Waterslager canaries.
    • Disordered stereociliary bundle orientation in the saccule is a likely structural correlate of the observed vestibular functional deficits.