The central nervous system does not minimize energy cost in arm movements.

@article{Kistemaker2010TheCN,
  title={The central nervous system does not minimize energy cost in arm movements.},
  author={Dinant A. Kistemaker and Jeremy D. Wong and Paul L. Gribble},
  journal={Journal of neurophysiology},
  year={2010},
  volume={104 6},
  pages={2985-94}
}
It has been widely suggested that the many degrees of freedom of the musculoskeletal system may be exploited by the CNS to minimize energy cost. We tested this idea by having subjects making point-to-point movements while grasping a robotic manipulandum. The robot created a force field chosen such that the minimal energy hand path for reaching movements differed substantially from those observed in a null field. The results show that after extended exposure to the force field, subjects… CONTINUE READING

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