IN VIVO MR STUDIES OF DYNAMIC CHANGES IN THE OF THE FOREARM DURING TION

brane (IOM) during forearm rotation were studied e right forearms of 20 healthy volunteers were xial slices were obtained at the proximal quarter, The changes in shape of the IOM during rotation age, we measured the interosseous distance and the the tendinous and membranous parts of the IOM minimal dynamic changes in the tendinous part on merous changes during rotation. The interosseous brane were maximum from a neutral to a slightly red to be taut during rotation to provide stability ranous part which is soft, thin and elastic, allows Volume, 1999) 24B: 2: 245–248The interosseous membrane (IOM) of the forearm is a membranous septum between the radius and the ulna (Anderson, 1978; Richards, 1996). There are three components to the IOM: the tendinous part which origi-nates from the proximal one-third of the radius and inserts into the distal one fourth of the ulna; the membra-nous part that lies proximal and distal to the tendinous parts; and the dorsal oblique accessory cord that runs from the proximal quarter of the ulna to the middle of the radius on the dorsal aspect. The IOM acts as a stabi-lizer between the radius and ulna, distributes and trans-mits load from the radius to ulna, and allows smooth forearm rotation. During forearm rotation, dynamic changes must occur in the IOM (Nakamura et al., 1994)