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[Somatosensory evoked potentials in moderate hyperthermia].

H Strenge1

  • 1Abteilung Neurologie, Universität Kiel.

EEG-EMG Zeitschrift Fur Elektroenzephalographie, Elektromyographie Und Verwandte Gebiete
|September 1, 1991
PubMed
Summary

Moderate whole-body hyperthermia affects somatosensory evoked potentials (SEP) by increasing nerve signal latency. Even slight temperature changes can cause significant delays in cervical and cortical SEP components.

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Area of Science:

  • Neuroscience
  • Physiology

Context:

  • Investigating the physiological impact of elevated body temperatures on neural pathways.
  • Examining thermoregulatory responses and their effects on nervous system function.

Purpose:

  • To determine how moderate whole-body hyperthermia influences cervical and cortical somatosensory evoked potentials (SEPs).
  • To quantify the latency and amplitude changes in SEPs in response to controlled hyperthermia.

Summary:

  • Healthy male subjects underwent whole-body hyperthermia, reaching a median rectal temperature of 39.0°C.
  • Serial SEPs were recorded during cooling, noting latency increases of 2.6-3.7% (cervical) and 1.5-7.4% (cortical) per 1°C drop.
  • Significant latency delays in cervical N13 and cortical N20 were observed at minor temperature changes (0.2-0.5°C).

Impact:

  • Provides quantitative data on the sensitivity of SEP components to thermal stress.
  • Highlights the potential for subtle temperature fluctuations to impact neurological assessments.
  • Informs understanding of thermoregulation's role in central and peripheral nervous system excitability.

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