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Relation between flight hours and peripheral nervous conduction velocity.

J L Garcia Alcon1, J M Moreno Vazquez, P Mena Arias

  • 1Physiology Department, Extramadura University, Badajoz, Spain.

Aviation, Space, and Environmental Medicine
|April 1, 1990
PubMed
Summary
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Pilots exhibit enhanced peripheral nerve function, with sensory conduction velocity increasing alongside flight experience. This study links improved nerve conduction and antioxidant enzyme activity in pilots to potentially higher oxygen consumption.

Area of Science:

  • Neurophysiology
  • Biochemistry
  • Aerospace Medicine

Background:

  • The peripheral nervous system's sensitivity to internal environment changes is well-documented.
  • Age-related decline in peripheral nerve conduction velocity is a known phenomenon in the general population.

Purpose of the Study:

  • To investigate neurophysiological and enzymatic differences between pilots and non-pilot controls.
  • To determine the impact of flight experience on peripheral nerve conduction velocity and antioxidant enzyme activity.

Main Methods:

  • Neurophysiological assessment of peripheral nervous conduction velocity.
  • Enzymatic assays for erythrocyte catalase and glutathione-peroxidase activity.
  • Comparative analysis between instructor pilots, student pilots, and control subjects.

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Main Results:

  • Pilots did not exhibit the typical age-dependent decrease in sensory conduction velocity.
  • Sensory conduction velocity showed a significant positive correlation with accumulated flight hours (r = 0.6461, p = 0.0016).
  • Pilots demonstrated significantly increased erythrocyte catalase and glutathione-peroxidase activity compared to controls (p < 0.01).

Conclusions:

  • Flight experience appears to mitigate age-related decline in peripheral nerve conduction.
  • Elevated antioxidant enzyme activity in pilots may be linked to chronic increased oxygen consumption.
  • These findings suggest physiological adaptations in pilots potentially related to flight demands.