Spatiotemporal contrast sensitivity differs in normal aging and Parkinson's disease.
Identifieur interne : 001774 ( PubMed/Curation ); précédent : 001773; suivant : 001775Spatiotemporal contrast sensitivity differs in normal aging and Parkinson's disease.
Auteurs : D. Mestre [France] ; O. Blin ; G. Serratrice ; J. PailhousSource :
- Neurology [ 0028-3878 ] ; 1990.
English descriptors
- KwdEn :
- MESH :
- chemical , deficiency : Dopamine.
- metabolism : Parkinson Disease.
- psychology : Aging, Parkinson Disease.
- Adult, Aged, Contrast Sensitivity, Female, Humans, Male, Middle Aged, Motion Perception, Space Perception, Time Perception.
Abstract
We measured contrast sensitivity for static and laterally drifting vertical gratings in 12 young adults, 7 normal elderly adults, and 8 patients with Parkinson's disease (PD). We compared static and motion contrast sensitivity for spatial frequencies of 0.25, 1, and 4 cycles per degree (cpd), and temporal frequencies of 1, 3, and 9 Hz. Results show that normal aging leads to a reduction of motion sensitivity for the spatial frequency of 0.25 cpd. Compared with elderly controls, PD patients do not present specific abnormalities in this domain. However, for spatial frequencies of 1 and 4 cpd and temporal frequencies of 1 and 3 Hz, motion sensitivity is worse than static sensitivity in PD patients and not in elderly controls. These findings suggest a specific deficit of motion perception in PD, and possible dopaminergic involvement in the control of visuospatial behavior.
PubMed: 2234426
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pubmed:2234426Le document en format XML
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<front><div type="abstract" xml:lang="en">We measured contrast sensitivity for static and laterally drifting vertical gratings in 12 young adults, 7 normal elderly adults, and 8 patients with Parkinson's disease (PD). We compared static and motion contrast sensitivity for spatial frequencies of 0.25, 1, and 4 cycles per degree (cpd), and temporal frequencies of 1, 3, and 9 Hz. Results show that normal aging leads to a reduction of motion sensitivity for the spatial frequency of 0.25 cpd. Compared with elderly controls, PD patients do not present specific abnormalities in this domain. However, for spatial frequencies of 1 and 4 cpd and temporal frequencies of 1 and 3 Hz, motion sensitivity is worse than static sensitivity in PD patients and not in elderly controls. These findings suggest a specific deficit of motion perception in PD, and possible dopaminergic involvement in the control of visuospatial behavior.</div>
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