Self-initiated versus externally cued reaction times in Parkinson's disease.

@article{Siegert2002SelfinitiatedVE,
  title={Self-initiated versus externally cued reaction times in Parkinson's disease.},
  author={Richard John Siegert and David N Harper and Fiona Cameron and David Abernethy},
  journal={Journal of clinical and experimental neuropsychology},
  year={2002},
  volume={24 2},
  pages={146-53}
}
It has long been observed that patients with Parkinson's disease (PD) can sometimes react and move quickly in response to an external stimulus in a way that they cannot when required to initiate the movement themselves. This curious phenomenon has sometimes been called 'paradoxical kinesis'. The present study was an attempt to demonstrate this phenomenon in patients with PD using an objective and quantifiable experimental procedure. A reaction time task was used in which participants had to… CONTINUE READING

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