Variations in the Nutrition of the Canine Intervertebral Disc Induced by Motion

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Abstract
Some transport and metabolic parameters of the canine intervertebral disc induced by spinal motion were investigated. The movements of the spine were obtained during supervised exercise, where either moderate, violent or specific movements were performed. The results show changes in the metabolic rates as well as in concentration profiles of metabolites of the exercised groups in comparison to the control group. An increasing aerobic metabolism was noted in the outer part of the annulus and in the central part of the nucleus pulposus, resulting in a reduction in the lactate concentration. Spinal movements, over a longer period of time give rise to positive nutritional variations. Furthermore, the reported changes might be of significance also for the human lumbar disc problem, since previous studies have demonstrated nutritional similarities between the discs of dogs and men.

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