. American quarterly of roentgenology . No. 8. Fractured radius. Note that thestyloid of the radius is proximal to the crossline, indicating a backward and upward dis-placement of the radial head. The long axisof the radius now passes down between thethird and fourth metacarpal bones owing tothe rotation of the hand and carpal area withthe displaced radial head. No. 8. No. 9. Lateral view of same case as This is shown to prove the interpretationmade under No. 8, and to show the directionof the joint surface of the radial head whenthere is a backward and upward displacementof the radial h
. American quarterly of roentgenology . No. 8. Fractured radius. Note that thestyloid of the radius is proximal to the crossline, indicating a backward and upward dis-placement of the radial head. The long axisof the radius now passes down between thethird and fourth metacarpal bones owing tothe rotation of the hand and carpal area withthe displaced radial head. No. 8. No. 9. Lateral view of same case as This is shown to prove the interpretationmade under No. 8, and to show the directionof the joint surface of the radial head whenthere is a backward and upward displacementof the radial head. Normally, the joint sur-face of the radial head exhibits the dorsaledge distal to the palmar edge but when thereis any displacement backward and upv\^ardit exhibits just the opposite, which is hereillustrated. See No. 11 for normal position. No. 9 No. 10. Fractured radial head is the same case as No. 8 after reduc-tion and while in a plaster cast. Note thatwe now have the normal plotting of the twolines and the styloid of the radius is distalto the cross line.
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