During passive motion, the human tibiotalar (ankle) joint behaves as a single degree-of-freedom (1DOF) system [1,2]. In these conditions, fibres within the ligaments remain nearly isometric throughout the flexion arc and articular surfaces nearly rigid. Relevant theoretical models are showing that the ligaments and the articular surfaces act together as mechanisms to control the passive joint kinematics [3-5]. Kinematic measurements and corresponding model predictions also revealed that the instantaneous screw axes of passive motion pass near to a single point, hereinafter called pivot point [5]. The present study investigates the extent to which this motion is spherical-like.
Sancisi, N., PARENTI CASTELLI, V., Baldisserri, B., Belvedere, C., Romagnoli, M., D'Angeli, V., et al. (2012). Validation of a one degree-of-freedom spherical model for kinematics analysis of the human ankle joint. JOURNAL OF FOOT AND ANKLE RESEARCH, 5(Suppl 1), 1-2 [10.1186/1757-1146-5-S1-P13].
Validation of a one degree-of-freedom spherical model for kinematics analysis of the human ankle joint
SANCISI, NICOLA;PARENTI CASTELLI, VINCENZO;BALDISSERRI, BENEDETTA;BELVEDERE, CLAUDIO;LEARDINI, ALBERTO
2012
Abstract
During passive motion, the human tibiotalar (ankle) joint behaves as a single degree-of-freedom (1DOF) system [1,2]. In these conditions, fibres within the ligaments remain nearly isometric throughout the flexion arc and articular surfaces nearly rigid. Relevant theoretical models are showing that the ligaments and the articular surfaces act together as mechanisms to control the passive joint kinematics [3-5]. Kinematic measurements and corresponding model predictions also revealed that the instantaneous screw axes of passive motion pass near to a single point, hereinafter called pivot point [5]. The present study investigates the extent to which this motion is spherical-like.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
