Signal-dependent noise determines motor planning

@article{Harris1998SignaldependentND,
  title={Signal-dependent noise determines motor planning},
  author={Christopher M. Harris and Daniel M. Wolpert},
  journal={Nature},
  year={1998},
  volume={394},
  pages={780-784}
}
When we make saccadic eye movements or goal-directed arm movements, there is an infinite number of possible trajectories that the eye or arm could take to reach the target,. However, humans show highly stereotyped trajectories in which velocity profiles of both the eye and hand are smooth and symmetric for brief movements,. Here we present a unifying theory of eye and arm movements based on the single physiological assumption that the neural control signals are corrupted by noise whose variance… 

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