PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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Changes in Nerve Excitability During Neural Stretching

신경 신장 적용 시간에 따른 신경흥분성 변화

  • Lee, Dong-Rour (Department of Physical Therapy, Good Gang-An Hospital) ;
  • Rhee, Min-Hyung (Department of Physical Therapy, Graduate School, Catholic University of Pusan) ;
  • Eom, Ju-Ri (Department of Physical Therapy, Graduate School, Catholic University of Pusan) ;
  • Kim, Jong-Soon (Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan)
  • 이동률 (좋은강안병원 물리치료실) ;
  • 이민형 (부산가톨릭대학교 대학원 물리치료학과) ;
  • 엄주리 (부산가톨릭대학교 대학원 물리치료학과) ;
  • 김종순 (부산가톨릭대학교 보건과학대학 물리치료학과)
  • Received : 2018.06.25
  • Accepted : 2018.07.24
  • Published : 2018.08.31
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Abstract

Purpose: The neurodynamic test used to implicate symptoms arising from the nerve is proposed to selectively increase the strain of the nerve without increasing the strain of adjacent tissue, although this has not yet been established in the time of nerve tension application. This study aimed to investigate the acute effects of nerve stretching time on nerve excitability using compound nerve action potential (CNAP) analysis. Methods: Thirty healthy young adults (mean age=23.10 years) with no medical history of neurological or musculoskeletal disorder voluntarily participated in this study. Nerve excitability was assessed using the median nerve conduction velocity test. The amplitude of the CNAP was measured under three conditions: resting phase (supra-maximal stimulus, without nerve stretching), baseline phase (two-thirds of the supra-maximal stimulus, without nerve stretching), and stretch phase (two-thirds of the supra-maximal stimulus, with 1-5 minutes nerve stretching). One-way repeated measures ANOVA was conducted to compare the latency and amplitude of CNAP. A post-hoc test was analyzed using the contrast test. Results: The latency was significantly delayed after 1 min. of nerve stretching in comparison with the baseline test. However, no significant difference was found during the nerve stretching (1-5 min.). The amplitude was significantly increased by nerve stretching. Conclusion: Nerve stretching can induce nerve excitability without any nerve injury. Based on the results, more than 1 min. of nerve stretching as a neurodynamic test can be a useful method in the clinical setting.

Keywords

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