A simulation study of a programme generator for centrally programmed fast two-joint arm movements: responses to single- and double-step target displacements
✍ Scribed by J. F. van Sonderen; J. J. van der Gon Denier
- Publisher
- Springer-Verlag
- Year
- 1990
- Tongue
- English
- Weight
- 918 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0340-1200
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✦ Synopsis
From earlier experimental results we concluded that a sudden displacement of a target causes the internal representation of the target to shift gradually from the first to the second target location. This internal target is used as an input to the motor programme generator. The aim of the present simulation study is to investigate whether the CNS can programme fast arm movements towards the internal representation of the target without taking into account velocity-dependent mechanical interactions between the upper arm and forearm and velocity-dependent biomechanical properties of the muscles. The simulations of single-and double-step responses show that on the basis of the assumptions mentioned above, movement trajectories and velocity profiles are in fair agreement with experimental results. However, at the end of fast arm movements a stiffness and viscosity "control" is needed to halt the movement at the target location.