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Assessing joint vibration during spinal manipulation
Author(s) -
Cramer Gregory D.,
Ross Kim,
Pocius Judy,
Cantu Joe,
Laptook Evelyn,
Fergus Michael,
Gregerson Doug,
Selby Scott,
Raju P. K.
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.635.2
Subject(s) - supine position , accelerometer , joint (building) , nuclear medicine , medicine , limits of agreement , orthodontics , biomedical engineering , surgery , physics , structural engineering , quantum mechanics , engineering
This IRB‐approved study assessed the relationship between cavitation and zygapophysial (Z) joint gapping following spinal manipulation (adjusting) in 5 healthy volunteers. High signal MRI markers were used to accurately identify the T12, L3, and S1 spinous processes during scout views. Axial images of the L4/L5 and L5/S1 levels were obtained in the neutral supine position. Each subject was then positioned on the side, and accelerometers were placed over the marked spinous processes. Recording from the accelerometers was done from final positioning through adjusting. The subject was then scanned in side posture position (accelerometers removed). Using a digitizer, the greatest A‐P central Z joint articular surface distances were measured on the 1 st and 2 nd scans; the difference between the 2 measurement values was the gapping difference, GD; a positive value indicating an increase in gapping following the spinal adjustment. GD was compared between up‐side (adjusted), down‐side (non‐adjusted), cavitation, and non‐cavitation joints. Results GD was increased in Z joints that were adjusted [0.5 (SE 0.2) mm] vs. non‐adjusted [−0.2 (SE 0.2) mm], and vertebral segments with cavitation gapped more than no cavitation [0.8 (SE 0.4) vs. 0.4 (SE 0.2) mm]. Conclusions A future clinical study is quite feasible. Forty subjects would be needed for appropriate power (0.80). Funding: NIH/NCCAM (#2R01AT000123).