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Journal of Hand Surgery (British and European Volume)
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In Vivo MR Studies of Dynamic Changes in the Interosseous Membrane of the Forearm During Rotation

T. NAKAMURA
Y. YABE
Y. HORIUCHI

From the Department of Orthopaedic Surgery, School of Medicine, Keio University, Tokyo, Japan

Correspondence: T. Nakamura MD, Department of Orthopaedic Surgery, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160, Japan

In vivo dynamic changes in the interosseous membrane (IOM) during forearm rotation were studied using magnetic resonance imaging (MRI). The right forearms of 20 healthy volunteers were examined in five different rotational positions. Axial slices were obtained at the proximal quarter, the middle and the distal quarter of the forearm. The changes in shape of the IOM during rotation were observed in an axial MR plane. For each image, we measured the interosseous distance and the length of the interosseous membrane. Images of the tendinous and membranous parts of the IOM could be differentiated by thickness. There were minimal dynamic changes in the tendinous part on the MRI while the membranous part showed numerous changes during rotation. The interosseous distance and the length of the interosseous membrane were maximum from a neutral to a slightly supinated position. The tendinous part is considered to be taut during rotation to provide stability between the radius and the ulna, but the membranous part which is soft, thin and elastic, allows smooth rotation.

Journal of Hand Surgery (British and European Volume), Vol. 24, No. 2, 245-248 (1999)
DOI: 10.1054/JHSB.1998.0185
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