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Related Experiment Videos

Brain stem auditory evoked responses during the cold pressor test

N Vaney1, A Sethi, O P Tandon

  • 1Department of Physiology, University College of Medical Sciences, Delhi.

Indian Journal of Physiology and Pharmacology
|April 1, 1994
PubMed
Summary

The cold pressor test (CPT) significantly increased the amplitude of wave V in brainstem auditory evoked potentials (BAEPs) in healthy adults. This suggests CPT may activate auditory pathways in the midbrain.

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Area of Science:

  • Neuroscience
  • Auditory Evoked Potentials
  • Human Physiology

Background:

  • Brainstem auditory evoked responses (BAEPs) assess auditory pathway function.
  • The cold pressor test (CPT) is a physiological stressor used to evaluate autonomic responses.

Purpose of the Study:

  • To investigate alterations in BAEPs during the cold pressor test (CPT) in healthy individuals.
  • To determine if physiological stress from CPT impacts auditory pathway activity.

Main Methods:

  • Thirteen healthy young adults (18-25 years) underwent the CPT.
  • BAEPs were recorded using a 10-20 international electrode system with click stimuli.
  • BAEPs, heart rate, and blood pressure were measured pre- and during CPT.

Main Results:

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  • A significant increase (P < 0.05) in the amplitude of wave V of BAEPs was observed during CPT.
  • Mean wave V amplitude increased from 0.37 +/- 0.174 mu V at rest to 0.47 +/- 0.203 mu V during CPT.
  • No significant changes were reported for absolute peak latencies.

Conclusions:

  • The CPT induces a measurable change in auditory pathway function, specifically increasing wave V amplitude.
  • This finding may indicate an interaction between activated monoaminergic pathways or nociceptive afferents and the midbrain auditory generator during stress.