. A radiographic atlas of the pathologic changes of bones and joints . o adult life. The period at Avhich ossification takes place, and hence theshadows depending upon same, vary so much, even in childrenof the same age, that we have found it best and most practicalwhenever in doubt when examining skiagraphs in which thepathological changes were not well marked to compare the doubt-ful negative with one made from the corresponding healthy partof the same patient. For obvious reasons we have inserted this chapter in this partof the work, before those in which pathological conditions aredescribe
. A radiographic atlas of the pathologic changes of bones and joints . o adult life. The period at Avhich ossification takes place, and hence theshadows depending upon same, vary so much, even in childrenof the same age, that we have found it best and most practicalwhenever in doubt when examining skiagraphs in which thepathological changes were not well marked to compare the doubt-ful negative with one made from the corresponding healthy partof the same patient. For obvious reasons we have inserted this chapter in this partof the work, before those in which pathological conditions aredescribed. — 28 — PLATE III. NOKMAI, SHori-IiER JOINT—AXTERU-rOSTERIOR POSITION. Note the position of the head of tlie hiiinenis with reference to theglenoid cavity. The articular surface of the head of the luinierus, its anotoniical neck,and the bicipital groove show plainly. The neck and spine of the scapula, the glenoid cavity, the acromion andcoracoid process can be easily made out. Notice particularly the apparent separation at the acroniio-claviculararticulation. PLATE III. — 30 PLATE IV. NORMAL SHOULDER JOINT—POSTERIOR-ANTERIOR VIEW—HEAD OF HUMERISROTATED OUTWARDS. As in Plate III, ihe articular surface of the head of the humerus, itsanotoniical neck, the bicipital groove, the glenoid cavity, the neck andspine of the scapula, acromion and coracoid processes all show up verydistinctly. The apparent separation of the acromio-clavicular articulationis not so noticeable.
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