Abnormalities of smooth eye and head movement control in Parkinson's disease.

  title={Abnormalities of smooth eye and head movement control in Parkinson's disease.},
  author={John A Waterston and Graham R. Barnes and M. A. Grealy and Sue Collins},
  journal={Annals of neurology},
  volume={39 6},
The control of horizontal head and eye movements was examined in 13 nondemented patients with Parkinson's disease (PD) of mild to moderate severity. During pursuit of single-frequency sine waves, smooth component eye velocity was lower in the PD group at frequencies of 1.2 Hz and above; but the differences in overall eye displacement were even greater, indicating an impaired ability to generate catch-up saccades at high frequencies. A corresponding deficit in saccadic performance was observed… CONTINUE READING
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