A longitudinal study of motor performance and striatal [18F]fluorodopa uptake in Parkinson's disease

Catherine L. Gallagher, Sterling C. Johnson, Barbara B. Bendlin, Moo K. Chung, James E. Holden, Terrence R. Oakes, Benjamin R. Brooks, Richard A. Konopacki, Selami Dogan, James H. Abbs, Guofan Xu, Robert J. Nickles, Robert W. Pyzalski, Onofre T. DeJesus, W. Douglas Brown

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Although [ 18F]fluoro-l-dopa [FDOPA] positron emission tomography (PET) has been used as a surrogate outcome measure in Parkinson's disease therapeutic trials, this biomarker has not been proven to reflect clinical status longitudinally. We completed a retrospective analysis of relationships between computerized sampling of motor performance, FDOPA PET, and clinical outcome scales, repeated over 4 years, in 26 Parkinson's disease (PD) patients and 11 healthy controls. Mixed effects analyses showed that movement time and tongue strength best differentiated PD from control subjects. In the treated PD cohort, motor performance measures changed gradually in contrast to a steady decline in striatal FDOPA uptake. Prolonged reaction and movement time were related to lower caudate nucleus FDOPA uptake, and abnormalities in hand fine force control were related to mean striatal FDOPA uptake. These findings provide evidence that regional loss of nigrostriatal inputs to frontostriatal networks affects specific aspects of motor function.

Original languageEnglish (US)
Pages (from-to)203-211
Number of pages9
JournalBrain Imaging and Behavior
Volume5
Issue number3
DOIs
StatePublished - Sep 2011
Externally publishedYes

Keywords

  • Ageing
  • Facial Muscles/*physiopathology
  • Fluorodopa
  • Motor control
  • Parkinson's disease
  • Positron emission tomography
  • Tongue/*physiopathology

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Cognitive Neuroscience
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Psychiatry and Mental health
  • Behavioral Neuroscience

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