Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 8936
  Title Time course considerations for the effects of unilateral lower cervical adjustments with respect to the amelioration of cervical lateral-flexion passive end-range asymmetry
Journal J Manipulative Physiol Ther. 1990 Jul-Aug;13(6):297-304
Peer Review Yes
Publication Type

The initial effectiveness as well as the temporal stability of the effect of cervical spinal manipulation with respect to the amelioration of goniometrically verified cervical lateral-flexion passive end-range asymmetry was examined. Responses of two groups of pain-free subjects were compared: a) those exhibiting end-range asymmetries of greater than 10 degrees who, in addition, had suffered previous neck trauma, and; b) those who happened to exhibit end-range asymmetries of greater than 10 degrees but who had no history of prior neck trauma. All subjects received a single lower cervical adjustment delivered to the side of most-restricted end-range, and goniometric reassessments were performed 30 min, 4 hr, and 48 hr following the adjustment. A dramatic amelioration of asymmetry was observed in both groups at 30 min and 4 hr postmanipulation. Furthermore, the magnitudes of these short-term effects were similar for the two groups. However, by 24 hours, a difference in the temporal responses of the groups had become readily apparent. By 48 hours, the difference was even more striking; whereas 14 of 16 of the subjects with no previous neck trauma continued to exhibit asymmetries of less than 10 degrees (mean +/- SEM = 3.8 +/- 1.0 degrees), 12 of the 16 subjects with previous neck trauma had regained asymmetries of greater than 10 degrees (mean +/- SEM = 11.4 +/- 1.7 degrees). These results indicate that among asymptomatic (pain-free) individuals, the mere presence of passive end-range asymmetry as well as the magnitude of the short-term ameliorative effect of cervical manipulation do not distinguish these two categories of subjects.

This abstract is reproduced with the permission of the publisher. Article only available in print.


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