A practical treatise on fractures and dislocations . the radius may be thrown either forward or back-ward, so as to be out of line with the ulna. Such a displacement gener-erally implies a rupture of the annular ligament. We have now only to suppose the action of a more considerable forcein the same direction to render the dislocation complete; in which casethe upper end of the radius is sometimes thrown completely forward, andits head may even be found resting in front of the ulna, occasioning anextreme pronation of the forearm and hand. The anconeus and brachialisanticus are the only muscles
A practical treatise on fractures and dislocations . the radius may be thrown either forward or back-ward, so as to be out of line with the ulna. Such a displacement gener-erally implies a rupture of the annular ligament. We have now only to suppose the action of a more considerable forcein the same direction to render the dislocation complete; in which casethe upper end of the radius is sometimes thrown completely forward, andits head may even be found resting in front of the ulna, occasioning anextreme pronation of the forearm and hand. The anconeus and brachialisanticus are the only muscles in either of these dislocations whose fibresare generally much disturbed; the biceps and triceps being made also totraverse the articulation a little more obliquely. In examples of frac-ture of the external condyle, the condyle being carried outward, theradius may remain in contact with the trochlea, and the ulna may accom-pany it in this outward displacement; but this must be regarded as afracture rather than as a dislocation. Fig. 406. Fig.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjec, booksubjectfractures
