The ratios of rolling and sliding movements of huemral head during axial rotation in the dynamic glenohumeral instability using real-time cine MRI

Abstract

Four patients with bilateral multidirectional instability of glenohumeral joint(eight shoulders)(DI)and four healthy adults (eight shoulders)(DS)participated in this study. All subjects were instructed to rotate their shoulders at the arm by side of the body with 15 cycles in one minute while scanning by a 0.4 T open MRI device(Aoerti Eterna, Hitachi Medical Corporation, Japan)and recording by a video camera, simultaneously.