Document Detail

High loading rate during spinal manipulation produces unique facet joint capsule strain patterns compared with axial rotations.
MedLine Citation:
PMID:  16326237     Owner:  NLM     Status:  MEDLINE    
PURPOSE: Lumbar spinal manipulation (SM) is a popular, effective treatment for low back pain but the physiological mechanisms remain elusive. During SM, mechanoreceptors innervating the facet joint capsule (FJC) may receive a novel stimulus, contributing to the neurophysiological benefits of SM. The biomechanics of SM and physiological axial rotations were compared to determine whether speed or loading site affected FJC strain magnitudes or patterns. METHODS: Human lumbar spine specimens were tested during physiological rotations and simulated SM while measuring applied torque, vertebral motion, and FJC strain. During physiological rotations, specimens were actuated at T12 to 20 degrees left and right axial rotation at 2 degrees to 125 degrees per second. During SM simulations, a 7-mm impulse displacement was applied to L3, L4, or L5 at 5 to 50 mm per second. RESULTS: Physiological rotations. Increasing displacement rate resulted in significantly larger torque magnitudes (P < .001), whereas vertebral kinematics and FJC strain magnitudes were unchanged (P > .05). Physiological rotations vs SM. Applied torque and vertebral rotation magnitudes were similar across speed and vertebral level. Total vertebral translations were slightly larger during physiological rotations vs SM at a given loading rate (P < .05). Patterns of vertebral motions and FJC strain during SM and physiological rotations varied significantly with loading rate (P < .05) but not with actuation site (P > .15). CONCLUSIONS: The similar patterns observed in vertebral motion and FJC strain across actuation sites during SM and physiological rotations suggest that site specificity of SM may have minimal clinical relevance. High loading rates during lumbar SM resulted in unique patterns in FJC strain, which may result in unique patterns of FJC mechanoreceptor response.
Allyson Ianuzzi; Partap S Khalsa
Related Documents :
9306527 - Cut-off point of the scoliometer in school scoliosis screening.
7691547 - Data-determined window size and space-oriented segmentation of spontaneous eeg map series.
19075327 - Mandible, maxilla and cervical spine--a functional unit?
8126047 - Mechanical behavior of the human lumbar and lumbosacral spine as shown by three-dimensi...
24583017 - Trkb-mediated protection against circadian sensitivity to noise trauma in the murine co...
16571737 - Spike-frequency adaptation and intrinsic properties of an identified, looming-sensitive...
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of manipulative and physiological therapeutics     Volume:  28     ISSN:  1532-6586     ISO Abbreviation:  J Manipulative Physiol Ther     Publication Date:    2005 Nov-Dec
Date Detail:
Created Date:  2005-12-05     Completed Date:  2006-02-16     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7807107     Medline TA:  J Manipulative Physiol Ther     Country:  United States    
Other Details:
Languages:  eng     Pagination:  673-87     Citation Subset:  IM    
Department of Biomedical Engineering, Stony Brook University, HSC T18-030, Stony Brook, NY 11794-8181, USA
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Lumbar Vertebrae / physiology*
Manipulation, Chiropractic / methods*
Middle Aged
Torsion Abnormality
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Short-term effects of spinal manipulation on H-reflex amplitude in healthy and symptomatic subjects.
Next Document:  Variability within and between evaluations of sacroiliac pain with the use of distraction testing.