Principles and practice of spinal adjustment; for the use of students and practitioners . of hemorrhoids and uterinemalpositions is true, it can be with equal reason applied tothe vertebral column, since a study of its construction froma mechanical viewpoint shows clearly that it is originally de-signed for a horizontal position and not for the , when the vertebral column is placed in the ver-tical position—when a beam becomes a column—slightseparation of its component parts is likely to occur. It may be questioned by some: If the spine is constructedfor the horizontal pos
Principles and practice of spinal adjustment; for the use of students and practitioners . of hemorrhoids and uterinemalpositions is true, it can be with equal reason applied tothe vertebral column, since a study of its construction froma mechanical viewpoint shows clearly that it is originally de-signed for a horizontal position and not for the , when the vertebral column is placed in the ver-tical position—when a beam becomes a column—slightseparation of its component parts is likely to occur. It may be questioned by some: If the spine is constructedfor the horizontal position, what is the need of the interverte-bral cartilaginous discs, which are considered to exist for thepurpose of preventing jars to the vertebral column? Further-more if they were formed since the spine has assumed an up-right position, why have not the articular processes also hadtime to change to meet the changed requirements put uponthem? This can be answered very readily, by calling atten-tion to the fact that the discs are far from being merely for the 22 SPINAL ADJUSTMENT. Fig. 2. ANATOMICAL BASIS OF CHIROPRACTIC 23 purpose of preventing jarring of the spinal column. Theirimportant function is this: Were there no cartilage interposedbetween the bodies of the vertebrae, the slight movement be-tween the bare bone would soon cause the bones to wearaway. It has its counterpart in all joints (and the vertebralarticulations are joints) which are lined with cartilage. In this connection, let us quote a few extracts from anarticle on this subject by an engineer, William Jay Dana, B. spine is used as a column, while it is designed to serveas a beam. As a column it is far from ideally efficient, ismade up of twenty-four vertebrae held together by ligaments,muscles, etc., and separated by cartilaginous pads, which areeasily compressed. When a spinal column is suspended hori-zontally all the vertebrae lock with one another, the zygapo-physes being in perfect articulation
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