. A manual of diseases of the nervous system. e, usually slight, has resulted from asevere muscular exertion. This is an important fact, showing thatmuscular exertion may injure the spine, and may lead to symptoms 240 SPINAL COED. at a later date. Symptoms of such injury, in slight degree, are notuncommon. Fracture may occur at any part of the spine, but is most frequentat the fifth or sixth cervical, and at the last dorsal or first lumbarvertebrae. In the dorsal and lumbar regions, the bodies are brokenin two thirds of the cases, but in the cervical region, the arches aloneare fractured in on
. A manual of diseases of the nervous system. e, usually slight, has resulted from asevere muscular exertion. This is an important fact, showing thatmuscular exertion may injure the spine, and may lead to symptoms 240 SPINAL COED. at a later date. Symptoms of such injury, in slight degree, are notuncommon. Fracture may occur at any part of the spine, but is most frequentat the fifth or sixth cervical, and at the last dorsal or first lumbarvertebrae. In the dorsal and lumbar regions, the bodies are brokenin two thirds of the cases, but in the cervical region, the arches aloneare fractured in one half. Usually there is a displacement of thevertebral column at the seat of fracture. Rarely the bodies may becrushed without displacement. The displacement of the bone involvesa narrowing of the canal and, usually, compression of the cord. Thismay also result when the arches only are driven in. But the cordmay be seriously damaged when there is no permanent narrowing ofthe canal, as in Figs. 85 and 86. The dura mater is rarely torn except. Fig-. 85.—Fracture of the first lumbar vertebra. D M. Dura mater. Therewas no permanent narrowing of the canal, but, nevertheless, the spinalcord was greatly damaged at the spot; see next figure. by a splinter. Blood is almost always extravasated outside the duramater, often in considerable quantity, from the rupture of the largeveins in this situation. There are usually only small extravasationsin the pia mater. The cord is, in most cases, bruised and compressedby the lower fragment (Fig. 87). Sometimes it is flattened, and itmay even be divided, all nerve-substance being squeezed out of thepia-matral sheath at the spot. In the case shown in Figs. 85 and 86the cord appeared to have been split longitudinally at the spot, per-haps by the nerve-force of the concussion. It is very common to havelocal myelitis, opposite the fracture, without any permanent narrowingof the canal or compression of the cord, the inflammation seems to bethe direc
Size: 1832px × 1364px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnervoussystem, bookye
