Dopaminergic influence on disturbed spatial discrimination in Parkinson's disease.
Various sensory symptoms and disturbed sensory perception are often observed in patients with idiopathic Parkinson's disease (PD). The basis of sensory disturbance in PD is unknown but possibly reflects a role for the basal ganglia in sensory processing. To investigate the relationship between the sensory dysfunction and dopaminergic deficiency in PD, we measured spatial discrimination using the Grating Orientation Task in 21 drug-naive patients with PD, before and after long-term antiparkinson therapy, and 25 age-matched healthy controls. The grating orientation threshold was significantly higher in patients (3.03 +/- 0.84) than controls (2.03 +/- 0.79). After 3 to 10 months of antiparkinson therapy, the grating orientation threshold was significantly lowered (2.66 +/- 0.84), although it was still higher than that in controls. Improvement in the patients' sensory function was significantly correlated with motor improvement (r = 0.44). These results suggest that sensory dysfunction in Parkinson's disease is related at least in part to the dopaminergic deficit.
Shin
Hae-Won
HW
Department of Neurology and Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
Kang
Suk Y
SY
Sohn
Young H
YH
D000978:Antiparkinson Agents / Q000009:adverse effects* / Q000627:therapeutic use; D016022:Case-Control Studies; D004192:Discrimination, Psychological / Q000187:drug effects; D004298:Dopamine / Q000378:metabolism*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000188:drug therapy / Q000503:physiopathology*; D010468:Perceptual Disorders / Q000209:etiology*; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors
D000978:Antiparkinson Agents; D004298:Dopamine