In fracture of both bone forearm at same level, position of the arm in plaster is?

A twisting force (usually fall on hand) produce spiral fracture of both bones at different level (radius usually at higher level) A direct blow or angulating force causes a transverse fracture of both bones at same level. Rotational deformity in fracture shaft radius (produced by muscle pull) Biceps and supinator muscles, both of which are supinators, are inseed into upper third of the shaft of radius. Pronator teres is inseed into the middle third of bones and pronators quadratus into lower third. Treatment rationale A fracture of radius at the junction of upper and middle thirds proximal to pronators teres is therefore situated between two groups of muscles. The proximal fragment has only supinators inseed into it and the distal fragment has only pronators. Thus causing supination of proximal fragment and pronation of distal fragment. Fracture of upper third of radius are, therefore, should be immobilized with the hand and forearm supinated, so that the distal fragment is rotated into the same axis as the proximal fragment. If the fracture is at, or below, the middle third (distal to pronator teres) of the bone, The proximal fragment has both supinators and pronators muscles attached to it. It therefore takes up the mid position halfway between full supination and full pronation, and this forearm fracture should usually be immobilized with the hand and forearm in the mid position. Ref: Maheshwari 3/e, Page 91, Apley's Ohopedics 8/e, Page 611-13, Campbell's Operative ohopedics 10/e, Page 3042-44, Rockwood & Green's Fractures in Adult 6/e, Page 969-730.