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Introducing the external link model for studying spine fixation and misalignment: Part II - biomechanical features.

AUTHORS: Charles Henderson, D.C.; Gregory D. Cramer, D.C.; Qi Zhang, Ph.D.; James DeVocht, D.C.; Jason Fournier, D.C. 

The purpose of this study was to characterize intervertebral stiffness and alignment changes in the external link model. A testretest design was used to evaluate rats with spine segments linked in three alignment configurations and controls that were never linked. Spine stiffness was measured with a load platform, and flexion/extension misalignment was assessed on lateral radiographs obtained with a spine extension jig. Rats tested with links in place had significantly higher dorsal-to-ventral stiffness in the neutral configuration than rats in the flexed configuration. This difference remained after the links were removed. Stiffness after link removal was greater for longer linked periods. Surprisingly, stiffness after link removal was also greater with longer unlinked periods. Longer linked periods produced great misalignments during forced spine extension testing. Although link configuration was not a predictor of misalignments, longer times after link removal did produce greater misalignments. This study suggests that the external link model can be a valuable tool for studying the effects of spine fixation and misalignment, two cardinal features of what has been historically described as the chiropractic subluxation. Significant residual stiffness and misalignment remained after the links were removed. The progressive course of this lesion is consistent with subluxation theory and clinical chiropractic experience.

A survey of chiropractors practicing in Germany: practice characteristics, professional reading habits, and attitudes and perceptions toward research.

AUTHORS: Ilke Schwarz, D.C., M.S.; Maria Hondras, D.C. 

In 2004, a survey conducted by the European Chiropractor’s Union reported that “there appears to be little interest in research among chiropractors in Germany.” However, no research has tested this statement. The objective of this study was to explore the attitudes and perceptions of practicing chiropractors in Germany regarding research, to look at their reading and research habits, and to gather demographic and practice data. A questionnaire was developed and distributed among participants at a seminar held by the German Chiropractors’ Association in 2005. A total of 49 (72%) of 68 distributed questionnaires were returned. Forty-five (92%) respondents stated they would support research efforts in Germany and 15 (31%) declared interest in participating in practiced based research. An average of three hours per week were spent reading scientific literature by 44 (85%) respondents. However, few journals listed by respondents were peer-reviewed and indexed. Most participants agreed on the importance of research for the profession, but when asked about the most pressing issue for chiropractic in Germany, legislation and recognition of the profession were the dominant themes. The results of this survey show that there is a general interest in supporting and participating in research activities among chiropractors practicing in Germany. Next steps could consist of educating practitioners about the resources available to read and interpret the scientific literature and thus further the understanding of research.

Established in 1995, the Palmer Center for Chiropractic Research is situated in the William and Jo Harris Building on Palmer’s Davenport Campus.
William and Jo Harris Building
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