Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 21567
  Title Immediate effects of the audible pop from a thoracic spine thrust manipulation on the autonomic nervous system and pain: A secondary analysis of a randomized clinical trial
URL http://www.ncbi.nlm.nih.gov/pubmed/21237406
Journal J Manipulative Physiol Ther. 2011 Jan;34(1):37-45
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Subject(s)
Peer Review Yes
Publication Type Article
Abstract/Notes Purpose: This study investigated the immediate effects of audible joint sounds following a supine T3-T4 spinal thrust manipulation on the autonomic nervous system activity using a fully automated pupillometry system in patients with chronic neck pain. An additional aim was to determine if audible sounds as perceived by the therapist were associated with the reduction of pain following manipulation.

Methods: One hundred subjects with chronic neck pain completed the study protocol. The Mann-Whitney U test was used to compare the change scores of the 3 measuring points between the one-pop and multiple-pop groups. Subjects were randomized into either a manipulation or a mobilization group. A method of automated pupillometry was used in this study to capture pupil responsiveness.

Results: The analysis showed that there was no significant difference between the 2 groups (P > .05). The Kruskal-Wallis test was used to compare the median change scores between the mobilization, no-pop, and pop groups. The analysis showed that there was no statistically significant difference in the amount of change in pupil diameter between the 3 groups (P > .05).The Mann-Whitney U test demonstrated that the no-pop group (P = .031) and the multiple-pop group (P = .014) had a significant reduction of pain; however, it did not reach the minimal clinically significant level of 13 mm on the visual analog scale.

Conclusions: The results of this study provided evidence that the presence of joint sounds does not influence the overall activity of the autonomic nervous system following a thrust manipulation or contribute to the reduction of pain in patients with chronic neck pain.

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This article is open to the public as of February 2011. Click here for free full text.
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