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Article
Influence of competing distractors on response selection in Huntington’s disease and Parkinson’s disease
Psychology
  • Julie C. Stout
  • Scott Wylie
  • Patricia M. Simone, Santa Clara University
  • Eric R. Siemers
Document Type
Article
Publication Date
9-1-2001
Publisher
Taylor & Francis
Disciplines
Abstract
Current theories of the basal ganglia suggest a functional role in filtering stimuli that are competing for response selection. We hypothesised that damage to the basal ganglia, as occurs in Huntington's disease (HD) and Parkinson's disease (PD), may alter the effects of distractors on this filtering process. Fourteen HD subjects, 16 PD subjects, and age-matched healthy controls performed an ignored repetition test of negative priming. Negative priming was defined as a significant time cost in responding to a target that shared features with the distractor from the previous trial. Results indicated that whereas healthy controls and PD subjects showed normal negative priming, HD subjects failed to show negative priming. The results indicate that disruption to cells in the neostriatum, but not necessarily to cells in the substantia nigra, may affect selective attention by altering the influence of distractor stimuli competing for action.
Citation Information
Stout, J.C., Wylie, S.A., Simone, P.M., & Siemers, E.R. (2001). Influence of competing distractors on response selection in Huntington’s disease and Parkinson’s disease. Cognitive Neuropsychology, 18(7), 643-653.