Patients with early Parkinson's disease are not impaired on spatial orientating of attention.

@article{Sharpe1990PatientsWE,
  title={Patients with early Parkinson's disease are not impaired on spatial orientating of attention.},
  author={Margaret H. Sharpe},
  journal={Cortex; a journal devoted to the study of the nervous system and behavior},
  year={1990},
  volume={26 4},
  pages={515-24}
}
The shifting of attention to visual stimuli was studied in twenty patients with early Parkinson's disease (stage I or II as defined by the Hoehn and Yahr scale) and twenty normal controls matched for age, sex and intellectual status. Both groups were screened to exclude dementia, psychiatric disease and other neurological abnormalities. The speed of shifting attention to visual stimuli was measured using the cost and benefit paradigm. The results showed an overall increase in response latencies… CONTINUE READING