Movements of vertebrae during manipulative thrusts to unembalmed human cadavers

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)30-40
Journal / PublicationJournal of Manipulative and Physiological Therapeutics
Volume20
Issue number1
Publication statusPublished - 1997
Externally publishedYes

Abstract

Objective: The purpose of this study was to measure the relative movements of vertebrae during manipulative thrusts to unembalmed post-rigor mortis human cadavers.

Setting: The investigation was conducted in the gross anatomy laboratory at the University of Calgary.

Subjects: Two 77-yr-old, unembalmed, post-rigor mortis, male cadavers were used.

Interventions: 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.

Main Results: 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. 
Conclusions: 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.

Research Area(s)

  • Biomechanics, Chiropractic Manipulation, Spine, Vertebral Movements

Citation Format(s)

Movements of vertebrae during manipulative thrusts to unembalmed human cadavers. / Gal, J.; Herzog, W.; Kawchuk, G.; Conway, P. J.; Zhang, Y. T.

In: Journal of Manipulative and Physiological Therapeutics, Vol. 20, No. 1, 1997, p. 30-40.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal