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J Am Osteopath Assoc. 2018 Jun 1;118(6):396-402. doi: 10.7556/jaoa.2018.084.

Osteopathic Manipulative Therapy Potentiates Motor Cortical Plasticity.

Abstract

Context:

Osteopathic manipulative therapy (OMTh; manipulative care provided by foreign-trained osteopaths) is effective in managing pain caused by a variety of clinical conditions. Nevertheless, the physiologic mechanisms at the basis of the clinical improvement are poorly understood.

Objective:

To investigate the effects of OMTh, muscle stretching, and soft touch interventions on motor cortical excitability through a rapid-rate paired associative stimulation (PAS) protocol.

Methods:

In this crossover study, participants underwent OMTh, muscle stretching, and soft touch interventions. A rapid-rate PAS transcranial magnetic stimulation protocol was performed immediately after each intervention session, which consisted of 600 pairs of stimuli continuously delivered to the left primary motor cortex and to the right median nerve at a rate of 5 Hz for 2 minutes. The interstimulus intervals between the peripheral stimulus and the transcranial magnetic stimulation was set at 25 milliseconds. Before and after rapid-rate PAS (immediately after and 15 minutes after), changes in the amplitude of the motor evoked potentials were measured in the right abductor pollicis brevis and the right first dorsal interosseous.

Results:

Of the potential 15 participants initially recruited, 12 fit the inclusion criteria. Two of the 12 participants were excluded from the final analysis because of excessive artifact movements. Rapid-rate PAS induced a more pronounced, longer-lasting increase in cortical excitability in the abductor pollicis brevis muscle in patients 15 minutes after the OMTh intervention than after the muscle stretching or sham interventions (P=.016).

Conclusion:

Results of the current study provide support for the effects of OMTh on cortical plasticity.

PMID:
29809257
DOI:
10.7556/jaoa.2018.084
[Indexed for MEDLINE]

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