Spinal manipulation alters conduction velocity and force within the Tibialis Anterior Muscle

Research output: Chapter in Book/Report/Conference proceedingMeeting abstractpeer-review


Objectives: The objective of this study was to investigate the effects of chiropractic care on tibialis anterior (TA) muscle strength and to investigate muscle fiber conduction velocity (MFCV) during dorsiflexion. Methods: Twelve volunteers attended two experimental sessions, spinal manipulation (SM) and control in random order. Force produced during maximum voluntary contraction was recorded pre and post intervention. Conduction velocity was recorded while the subject dorsiflexed at 10% of maximum force. This task was further divided into sustained and dynamic contraction exercises. High Density Surface Electromyography was used to calculate the conduction velocity. Results: Force profile tests showed an increase in the force produced by the TA muscle during MVC in the SM group by 10.46 ± 7.8% while the control group decreased by 6.24 ± 7.33% (p<0.05). Conduction velocity in the SM group increased by 22.11 ± 11.69% while no differences were seen following the control intervention (p<0.05). During dynamic contraction MFCV increased by 4.52 ± 4.58% in the intervention group while the control decreased by 2.19 ± 2.94% (p<0.05). Conclusion: A single session of spinal manipulation alters neurological processing in the TA muscle, particularly increasing the force output and the conduction velocity.
Original languageEnglish
Title of host publicationAssociation of Chiropractic Colleges (ACC) Research Agenda Conference RAC 2018
Publication statusPublished - 14 Mar 2018


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