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Related Experiment Videos

The relationship between temperature and neuronal characteristics.

R Nelson1, J Agro, J Lugo

  • 1Lebanon Valley College, Physical Therapy Department, 101 N College Avenue, Annville, PA 17003-1400, USA.

Electromyography and Clinical Neurophysiology
|July 1, 2004
PubMed
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Limb surface temperature significantly impacts nerve conduction studies. Cooler temperatures correlate with increased distal latency and decreased amplitude for median and ulnar nerves, suggesting temperature correction factors are crucial.

Area of Science:

  • Neuroscience
  • Clinical Electrophysiology

Background:

  • Nerve conduction studies (NCS) assess peripheral nerve function.
  • Literature indicates temperature influences nerve conduction parameters like latency, amplitude, and velocity.
  • Clinical practice often involves temperature manipulation of limbs.

Purpose of the Study:

  • To investigate the relationship between limb surface temperature and electrophysiological characteristics of the median and ulnar nerves in healthy individuals.
  • To quantify the correlation between temperature and specific nerve parameters.

Main Methods:

  • Pearson product-moment correlation coefficient was used to analyze data.
  • Limb surface temperature was measured at the distal wrist crease.
  • Nerve conduction parameters including median and ulnar distal sensory latency (DSL), ulnar compound motor action potential (CMAP), and ulnar sensory nerve action potential (SNAP) were recorded.

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Main Results:

  • A significant negative correlation was observed between limb temperature and median DSL.
  • Significant negative correlations were found between limb temperature and ulnar DSL, ulnar CMAP, and ulnar SNAP.
  • No temperature manipulation was performed prior to testing.

Conclusions:

  • Limb surface temperature is a critical factor influencing NCS results.
  • Mathematical correction factors are recommended to adjust for cool limb temperatures instead of external heating.
  • These findings support the need for standardized temperature assessments in electrodiagnostic testing.