Journal of Bone and Joint Surgery, 1951;33:993-996.
© 1951 by The Journal of Bone and Joint Surgery, Inc
ROTATION OF THE FOREARM
An Experimental Study of Pronation and Supination
ROBERT D. RAY M.D., PH.D.1,
ROBERT J. JOHNSON M.D.1, and
ROBERT M. JAMESON M.D.1
1 Department of Surgery, Division of Orthopaedic Surgery; Department of Anatomy, University of Washington School of Medicine, Seattle
Photographic, roentgenographic, cinefluorographic, and electromyographic studies of pronation and supination of the forearm reveal:
1. That under ordinary circumstances the ulna is abducted during pronation and adducted during supination;
2. That contraction of the anconaeus can produce abduction of the ulna.