. A practical treatise on fractures and dislocations. tudy of the mechanism, pathology, andcause of the injury in the various forms. Mechanism and Pathology. In studying the mechanism of fracture certain anatomical featuresof the cranium must be borne in mind. Of the vault and base ofwhich it is composed in unequal parts, the former is globular, thick,and elastic ; the latter is flattened, irregular, thick in places, thin inothers, and perforated at many points for the passage of nerves andvessels. From the occipital condyles, by which it rests upon thespinal column, pass outward, backward, an
. A practical treatise on fractures and dislocations. tudy of the mechanism, pathology, andcause of the injury in the various forms. Mechanism and Pathology. In studying the mechanism of fracture certain anatomical featuresof the cranium must be borne in mind. Of the vault and base ofwhich it is composed in unequal parts, the former is globular, thick,and elastic ; the latter is flattened, irregular, thick in places, thin inothers, and perforated at many points for the passage of nerves andvessels. From the occipital condyles, by which it rests upon thespinal column, pass outward, backward, and forward various thickportions or ridges constituting a strong framework to connect themwith the vault; the basilar process and body of the sphenoid, the• occipital crest, and the petrous portions of the temporal bones ; furtherforward are the thicker portions of the greater and lesser wings of thesphenoid and the frontal crest. To a certain extent these ridges directlines of fracture of the base to the thinner intermediate segments, but Fig. Sword cut; fissured fracture. (Konig.) all can be crossed by them. The vault, which varies greatly in thick-ness at different points and in different individuals, has a thick outerand a thin inner table of dense bone separated by the spongy physical characteristic of the vault which most concerns us is its l<UAy compressing it, in ;i vise, or nportion of its surface can be momentarily flattened by a blow. The effect of violence acting upon the skull varies with its characterand the size and shape of the vulnerant body, and appears in .-ill thegradations between a slight crush or cut of the outer table or of theentire thickness of the bone, through circumscribed depressed areasto single or multiple fissures running completely around. A cuttinginstr
Size: 1769px × 1412px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, booksubjec
