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Related Experiment Videos

Neurophysiological effects of spinal manipulation.

Joel G Pickar1

  • 1Palmer Center for Chiropractic Research, 1000 Brady Street, Davenport, IA 52803, USA. pickar_j@palmer.edu

The Spine Journal : Official Journal of the North American Spine Society
|November 1, 2003
PubMed
Summary

Spinal manipulation influences sensory information processing and pain pathways by altering afferent neural input. Further research is needed to fully understand its neurophysiological effects and therapeutic scope.

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Area of Science:

  • Neuroscience
  • Physiology
  • Biomedical Engineering

Background:

  • Clinical evidence supports spinal manipulation benefits, but underlying biological mechanisms remain unknown.
  • Lack of mechanistic understanding hinders scientific acceptance and optimization of spinal manipulation delivery.

Purpose of the Study:

  • To review and examine the neurophysiological basis for the effects of spinal manipulation.

Main Methods:

  • Review of basic science and clinical basic science literature from Medline and textbooks.
  • Presentation of a theoretical model linking spinal manipulation, biomechanics, nervous system, and end-organ physiology.
  • Inclusion of experimental data supporting the theoretical model.

Main Results:

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  • Spinal manipulation stimulates muscle spindle and Golgi tendon organ afferents, potentially affecting smaller sensory nerve fibers.
  • It can alter central sensory processing, increasing pain tolerance by modulating stimuli to central pain pathways.
  • Spinal manipulation affects paraspinal muscle reflexes and motoneuron excitability, with potential complex excitatory and inhibitory effects on somatosomatic reflexes.

Conclusions:

  • A theoretical framework for neurophysiological effects of spinal manipulation is established.
  • Evidence indicates impacts on primary afferent neurons, motor control, and pain processing.
  • Further experimental research is crucial to elucidate mechanisms and enhance therapeutic applications.