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Figure 4 | Journal of NeuroEngineering and Rehabilitation

Figure 4

From: Muscle weakness and lack of reflex gain adaptation predominate during post-stroke posture control of the wrist

Figure 4

Block scheme of the human controller. Block scheme of the wrist admittance, representing (the inverse of) "C" in Figure 4. The wrist dynamics are the result of the interaction between the intrinsic dynamics H int , reflexive dynamics H ref and activation dynamics H act . The visco-elasticity as a result from co-contraction is included in Hint, together with the wrist inertia. Angular deviations (θ) are sensed by the reflexive system (Href) and result in a corrective torque. The imposed torque (T) together with the reflexive torque act upon the intrinsic system (Hint) which result in the angular deviations.

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