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Figure 2 | Journal of NeuroEngineering and Rehabilitation

Figure 2

From: EMG-based simultaneous and proportional estimation of wrist/hand kinematics in uni-lateral trans-radial amputees

Figure 2

The coordinate system for joint angle calculation. MEP and LEP: medial and lateral Epicondyle of Humerus. STR and STU: distal Styloid processes of Radius and Ulna. RMC and UMC: the distal laterally and medially prominent points of the second and fifth Metacarpal bone. The mid-point of MEP and LEP is marked as E (elbow). The mid-point of STR and STU is marked as O (origin). The mid-point of RMC and UMC is marked as H (hand). The z-axis point from O to E, the y-axis is orthogonal to z-axis and the line defined by STR and STU, and x-axis is orthogonal to z-axis and y-axis.

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