July 21, 1923


Author Affiliations

Loma Linda, Calif. Instructor in Anatomy, College of Medical Evangelists

JAMA. 1923;81(3):233. doi:10.1001/jama.1923.02650030057028

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To the Editor:  —In these days, when we hear on every side the claims that the articulations of the spinal column need repeated "adjustments," I think that medical men ought to have some definite data as to the strength of the spinal symphyses.The following experiments were performed in the anatomy laboratory of the College of Medical Evangelists at Loma Linda, Calif.:The spinal column selected was a fairly fresh one, and it was taken from a cadaver that had never been put into the preserving tank. A block of wood was taken, and into its surface there was cut a mortise slightly wider than the vertical dimension of a lumbar vertebra. The spinal column was then firmly fastened to this block so that the ventral margin was against the surface of the wood, and the body of the second lumbar vertebra was directly over the mortise, thus leaving that

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