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[The effect of the upper cervical spine on hearing ability]
Laryngologie, Rhinologie, Otologie
|October 1, 1988
Summary
Chronic upper cervical spine irritation in rabbits did not affect auditory brainstem response (ABR) thresholds. Findings suggest proprioceptive cervical hearing loss is unlikely, despite observed nystagmus.
Area of Science:
- Neuroscience
- Otolaryngology
- Physiology
Context:
- Investigating the relationship between cervical spine irritation and auditory-vestibular function.
- Utilizing animal models to understand complex physiological responses.
- Examining the impact of chronic irritation on sensory pathways.
Purpose:
- To assess the effect of chronic upper cervical spine irritation on vestibular and auditory functions in rabbits.
- To determine if cervical irritation induces auditory pathway alterations measurable by Brainstem Evoked Response Audiometry (BERA).
- To evaluate the validity of 'proprioceptive cervical hearing loss' as a diagnostic concept.
Summary:
- Chronic irritation of the upper cervical spine was induced in 10 rabbits via wire string implantation.
- Vestibular function (electronystagmography - ENG) and auditory function (BERA) were monitored pre- and post-operation.
- A significant increase in proprioceptive cervical nystagmus was observed post-operation, while BERA showed no changes in auditory threshold or latency.
Impact:
- Challenges the concept of 'proprioceptive cervical hearing loss' by demonstrating a dissociation between vestibular and auditory responses.
- Highlights the importance of differentiating between vestibular and auditory system changes in response to cervical stimuli.
- Provides evidence suggesting that auditory pathway integrity is maintained despite cervical irritation and associated nystagmus.