The patterns of control signals underlying elbow joint movements in humans.

摘要: Position, velocity, flexor and extensor electromyographic (EMG) activity of fast, moderate slow elbow movements to a target were recorded simulated using model in which reciprocal co-activation central commands, proprioceptive feedback mechanical properties muscles considered. Two hypotheses concerning the pattern shift equilibrium point (EP) underlying tested. First, nervous system specifies constant rate EP produce movement encodes displacement by duration (ramp-shaped pattern). Second, fast movements, rapidly shifts towards future final position but then back forth eventually reaching (N-shaped The ramp was consistent with kinematic EMG experimental data regardless speed. In contrast, N-shaped incompatible characteristics movements.