Principles and practice of spinal adjustment; for the use of students and practitioners . of the vertebrae are brought firmly up against thesuperior articular processes of the vertebrae below them, andno displacement can occur. If, however, the head and chestare thrown too far backward, and the weight is thrown uponthe articular processes, the inferior articular processes willhave a tendency to slide backward on the superior articularprocesses of the vertebra below, and in this way will forcethe latter forward into the intervertebral foramen. A carefulstudy of Fig. 43 will show that this is me
Principles and practice of spinal adjustment; for the use of students and practitioners . of the vertebrae are brought firmly up against thesuperior articular processes of the vertebrae below them, andno displacement can occur. If, however, the head and chestare thrown too far backward, and the weight is thrown uponthe articular processes, the inferior articular processes willhave a tendency to slide backward on the superior articularprocesses of the vertebra below, and in this way will forcethe latter forward into the intervertebral foramen. A carefulstudy of Fig. 43 will show that this is mechanically correct. 264 SPINAL ADJUSTMENT In a lordotic subluxation the intervertebral foramen is in-creased in size vertically, but its antero-posterior diameter isdiminished and the vessels and nerves which it transmits com-pressed by being encroached upon by the superior articularprocesses. Fig. 43. Scoliotic Subluxation.—Scoliosis is a lateral curvature ofa section of the vertebral column, or of the entire scoliosis is also not confined to a single vertebra, but in-. Fig. 43. Lordotic Subluxation. volves at least three vertebrae. What might be termed aphysiological scoliosis is commonly seen in individuals whouse the right arm almost exclusively in their work, and as aresult of the muscular contraction on the right side thespine is slightly drawn toward that side. This form of subluxation is due to a thinning of the lateralaspect of the intervertebral cartilaginous discs, which per-mits the sides of the bodies of a group of vertebrae to ap-proach each other. As a result of this lateral approximation ofthe vertebrae the transverse processes on the contracted side VERTEBRAL SUBLUXATIONS 265 are brought toward each other on that side, while on the op-posite side they are widely separated. This results in amarked diminution in the vertical diameter of the interverte-bral foramina on the compressed side. The spinous processesof the involved vertebrae are displaced
Size: 1484px × 1683px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidprinciplespr, bookyear1915
