. A radiographic atlas of the pathologic changes of bones and joints . PLATE V. — 34- PLATE VI. NORMAL ELBOW JOINT—LATER.\L VIEW—IXTERXAL CO^•D^XE LYING ON THE X-RAY PLATE—THE FOREARM MIDWAY BETWEEX PRONATION AND SUPINATION, ITS ULNA SURFACE LYING ON THE PLATE, THE THUMB LOOKING UP. The trochlear surface of the humerus articulates with the greater sig-moid cavity of the ulna, and the radial head of the humerus articulateswith the head of the radius. The olecranon and coronoid processes, and the greater sigmoid cavityof the ulna, and the head and neck of the radius, are distinctly visible. The
. A radiographic atlas of the pathologic changes of bones and joints . PLATE V. — 34- PLATE VI. NORMAL ELBOW JOINT—LATER.\L VIEW—IXTERXAL CO^•D^XE LYING ON THE X-RAY PLATE—THE FOREARM MIDWAY BETWEEX PRONATION AND SUPINATION, ITS ULNA SURFACE LYING ON THE PLATE, THE THUMB LOOKING UP. The trochlear surface of the humerus articulates with the greater sig-moid cavity of the ulna, and the radial head of the humerus articulateswith the head of the radius. The olecranon and coronoid processes, and the greater sigmoid cavityof the ulna, and the head and neck of the radius, are distinctly visible. The radial head of the huraerrfs and the head of the radius are largerand their contour not so sharp, because they were lying farther from theX-ray plate than the ulna during the PLATE VI. -36 PLATE VII. NORMAL WRIST JOIXT—PALMAR VIEW. The sigmoid cavity of the radius receives the head of the ulna. The radius articulates with the scaplioid and the semi-kui?r. The cuneiform is separated from tlie lower end of the uhia by tlietriangular ligament, which throws no shadow on the skiagrauL The first row of carpal bones seen on the skiagram from without in-wards are the scaphoid, the semi-lunar, the cuneiform and the last bone can be distinguished as an almost round shadow overlappingthe inner half of the cuncifonn. The lower row of carpal bones proceeding from the nieta-cariKil boneof the thumb inwards are the trapezium, the trapezoid, the os m.^gnunl,and the unciform. The unciform or hook-like process of he unciform bono, tlie small sesa-moid bone of the thumb, and the styloid process can all be plainly seen.
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidradiographicatla00gran
