High-velocity low amp thrust & McKenzie extension in lying MT increase SNS response in LBP .
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A randomised, independent groups study investigating the sympathetic nervous system responses to two manual therapy treatments in patients with LBP
Man Ther. 2015 Dec;20(6):861-7.50 patients with low back pain were randomized to undergo either high-velocity low-amplitude thrust (HVLAT) rotary manipulation or the McKenzie Extension in Lying manual therapy approach. The study was conducted to assess the effects of these manual therapies on skin conductance, as a measure of sympathetic nervous system activity, which is thought to be the pain processing mechanism of the body. Although both therapies were reported to increase skin conductance (HVLAT to a significantly greater extent), without pain as a measured outcome it was difficult to infer the success of these therapies in low back pain patients.
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