. A practical treatise on fractures and dislocations. ar later after a fit of coughing he feltsomething give away in his side and found a wide space between thoseribs. Aunis2 found in a man fifty years old a dislocation forward of theseventh cartilage from the eighth ; it could be reduced by pressure, butimmediately recurred. The injury was caused by a fall backward. 1 Hochenzegg: Medical Press and Circular, Dec. 17, : Gaz. Hebdom., March 13, 1892. CHAPTER XLL DISLOCATIONS OF THE CLAVICLE. Of the Sternal End: Forward, backward, upward—Of the Acromial End:Supra-acromial, subacromial,
. A practical treatise on fractures and dislocations. ar later after a fit of coughing he feltsomething give away in his side and found a wide space between thoseribs. Aunis2 found in a man fifty years old a dislocation forward of theseventh cartilage from the eighth ; it could be reduced by pressure, butimmediately recurred. The injury was caused by a fall backward. 1 Hochenzegg: Medical Press and Circular, Dec. 17, : Gaz. Hebdom., March 13, 1892. CHAPTER XLL DISLOCATIONS OF THE CLAVICLE. Of the Sternal End: Forward, backward, upward—Of the Acromial End:Supra-acromial, subacromial, subcoracoid—Simultaneous of Both Ends. Of all dislocations about 5 per cent, are of the clavicle, those of theacromial are five times as frequent as those of the sternal end. Theperiod of greatest frequency appears to be between the thirtieth andfiftieth years, and during it the injury is almost wholly confined tomales. The dislocation may be of either end or of both, and occasionallyboth clavicles have been simultaneously dislocated. Fig. i **?> 1. DISLOCATIONS OF THE STERNAL END OF THE CLAVICLE. Anatomy. The sternal end of the clavicle is so much larger thanthe clavicular notch of the sternum with which it articulates that itprojects above it and in front and behind. The articular surfaces areseparated from each other by an interposed fibro-cartilaginous disk, or meniscus, which is most strongly at-tached above to the upper edge ofthe end of the clavicle, and belowto the cartilage of the first rib. Oneach side of it is a synovial ligaments of the joint are theinterclavicular, costo-clavicular, andthe anterior and posterior sterno-clavicular. The interclavicular liga-ment extends across from the upperedge of the end of one clavicle to thatof the other above the interclavicularnotch of the sternum, sending bun-dles of fibres into the meniscus andto the top of the sternum. The costo-clavicular ligament extends from thesternal end of the first rib upwarda
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