{"id":3613,"date":"1998-01-01T18:44:58","date_gmt":"1998-01-02T01:44:58","guid":{"rendered":"https:\/\/www.activator.com\/?p=3613"},"modified":"2023-06-07T08:33:26","modified_gmt":"2023-06-07T15:33:26","slug":"movements-of-vertebrae-during-manipulative-thrusts-to-unembalmed-human-cadavers-2","status":"publish","type":"post","link":"https:\/\/activator.com\/movements-of-vertebrae-during-manipulative-thrusts-to-unembalmed-human-cadavers-2\/","title":{"rendered":"Movements of Vertebrae During Manipulative Thrusts to Unembalmed Human Cadavers"},"content":{"rendered":"

Abstract<\/h3>\n
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OBJECTIVE:<\/h4>\n

The purpose of this study was to measure the relative movements of vertebrae during manipulative thrusts to unembalmed post-rigor mortis human cadavers.<\/p>\n

SETTING:<\/h4>\n

The investigation was conducted in the gross anatomy laboratory at the University of Calgary.<\/p>\n

SUBJECTS:<\/h4>\n

Two 77-yr-old, unembalmed, post-rigor mortis, male cadavers were used.<\/p>\n

INTERVENTIONS:<\/h4>\n

The movements of vertebrae were investigated by using high-speed cinematography to record the movements of bone pins threaded into T10, T11 and T12 during spinal manipulative therapy to unembalmed post-rigor human cadavers. A single clinician delivered a series of posterior-to-anterior (p-to-a) thrusts to the right transverse process of either T10, T11 or T12, using a reinforced hypothenar contact. Relative p-to-a and lateral translations, as well as axial and sagittal rotations, in T10-T11 and T11-T12 were calculated. Corresponding p-to-a forces exerted by the clinician onto the cadaver were recorded using a pressure pad.<\/p>\n

MAIN RESULTS:<\/h4>\n

Significant relative movements were measured primarily between the targeted and immediately adjacent vertebrae during the thrusts. Vertebral pairs remained slightly ‘hyper-extended’ after the rapid thrusts to T11, when the p-to-a forces returned to preload levels.<\/p>\n

CONCLUSIONS:<\/h4>\n

These findings may be useful for the understanding of the deformation behavior of the vertebral column during therapeutic manipulation. A fully three-dimensional analysis of all six degrees of freedom, using a larger number of unembalmed cadavers, would be useful in clarifying the relationship between the externally applied forces and the observed relative movement patterns of the vertebrae.<\/p>\n

\n

J Manipulative Physiol Ther.<\/a> 1997 Jan;20(1):30-40. [PMID:9004120<\/a>]<\/p>\n

Author information:\u00a0G\u00e1l J, Herzog W, Kawchuk G, Conway PJ, Zhang YT.\u00a0Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Alberta, Canada.<\/p>\n<\/div>\n