Impairment of high‐contrast visual acuity in Parkinson's disease
Identifieur interne : 006010 ( Main/Exploration ); précédent : 006009; suivant : 006011Impairment of high‐contrast visual acuity in Parkinson's disease
Auteurs : Jones [Nouvelle-Zélande] ; Ivan M. Donaldson [Nouvelle-Zélande] ; Paul L. Timmings [Nouvelle-Zélande]Source :
- Movement Disorders [ 0885-3185 ] ; 1992.
English descriptors
- KwdEn :
- Adult, Aged, Attention (physiology), Discrimination Learning (physiology), Female, Humans, Male, Middle Aged, Parkinson Disease (diagnosis), Parkinson Disease (physiopathology), Parkinson's disease, Sensory Thresholds (physiology), Vision Tests, Visual Acuity (physiology), Visual Cortex (physiopathology), Visual acuity.
- MESH :
- diagnosis : Parkinson Disease.
- physiology : Attention, Discrimination Learning, Sensory Thresholds, Visual Acuity.
- physiopathology : Parkinson Disease, Visual Cortex.
- Adult, Aged, Female, Humans, Male, Middle Aged, Vision Tests.
Abstract
Several studies have shown that the visual system is affected in Parkinson's disease (PD) with reduced contrast sensitivity, low‐contrast acuity, and flicker sensitivity, as well as altered electroretinograms (ERGs) and pattern visual evoked potentials (VEPs). Apparently, however, no study has yet specifically determined whether visual acuity to high‐contrast stimuli is impaired in PD. Visual acuity was measured in a group of 16 patients with PD, both on and off drugs (for 24 h), and 16 age‐ and sex‐matched normal control subjects. Acuity was impaired in the PD group both on standard Snellen chart and on a screen in a computerized test of visual resolution. The degree of impairment was 24 and 25%, respectively, in the two tests. The PD patients had marginally better acuity on both tests while receiving drugs, but the differences were not significant. The difference between the two groups was consistent with impaired resolution and could not be accounted for by any perceptual dysfunction that may also have been present in the PD group. Conversely, however, impaired acuity may be implicated in studies that have reported mild deficits of visuospatial/visuoperceptual function in PD. Reduced acuity appears to be a subtle sequela of dopaminergic deficiency in the visual system.
Url:
DOI: 10.1002/mds.870070308
Affiliations:
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Donaldson</name><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>Department of Neurology, Christchurch Hospital, Christchurch</wicri:regionArea><wicri:noRegion>Christchurch</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>Department of Medicine, Christchurch School of Medicine, Christchurch</wicri:regionArea><wicri:noRegion>Christchurch</wicri:noRegion></affiliation></author><author><name sortKey="Timmings, Paul L" sort="Timmings, Paul L" uniqKey="Timmings P" first="Paul L." last="Timmings">Paul L. Timmings</name><affiliation wicri:level="1"><country xml:lang="fr">Nouvelle-Zélande</country><wicri:regionArea>Department of Neurology, Christchurch Hospital, Christchurch</wicri:regionArea><wicri:noRegion>Christchurch</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="1992">1992</date><biblScope unit="vol">7</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="232">232</biblScope><biblScope unit="page" to="238">238</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">87E8DF59A82B6E5192AC0BB3DDBE5CDB7A4D80CD</idno><idno type="DOI">10.1002/mds.870070308</idno><idno type="ArticleID">MDS870070308</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Aged</term><term>Attention (physiology)</term><term>Discrimination Learning (physiology)</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Parkinson Disease (diagnosis)</term><term>Parkinson Disease (physiopathology)</term><term>Parkinson's disease</term><term>Sensory Thresholds (physiology)</term><term>Vision Tests</term><term>Visual Acuity (physiology)</term><term>Visual Cortex (physiopathology)</term><term>Visual acuity</term></keywords><keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Parkinson Disease</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Attention</term><term>Discrimination Learning</term><term>Sensory Thresholds</term><term>Visual Acuity</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Parkinson Disease</term><term>Visual Cortex</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Aged</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Vision Tests</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Several studies have shown that the visual system is affected in Parkinson's disease (PD) with reduced contrast sensitivity, low‐contrast acuity, and flicker sensitivity, as well as altered electroretinograms (ERGs) and pattern visual evoked potentials (VEPs). Apparently, however, no study has yet specifically determined whether visual acuity to high‐contrast stimuli is impaired in PD. Visual acuity was measured in a group of 16 patients with PD, both on and off drugs (for 24 h), and 16 age‐ and sex‐matched normal control subjects. Acuity was impaired in the PD group both on standard Snellen chart and on a screen in a computerized test of visual resolution. The degree of impairment was 24 and 25%, respectively, in the two tests. The PD patients had marginally better acuity on both tests while receiving drugs, but the differences were not significant. The difference between the two groups was consistent with impaired resolution and could not be accounted for by any perceptual dysfunction that may also have been present in the PD group. Conversely, however, impaired acuity may be implicated in studies that have reported mild deficits of visuospatial/visuoperceptual function in PD. Reduced acuity appears to be a subtle sequela of dopaminergic deficiency in the visual system.</div></front></TEI><affiliations><list><country><li>Nouvelle-Zélande</li></country></list><tree><country name="Nouvelle-Zélande"><noRegion><name sortKey="Jones" sort="Jones" uniqKey="Jones" last="Jones">Jones</name></noRegion><name sortKey="Donaldson, Ivan M" sort="Donaldson, Ivan M" uniqKey="Donaldson I" first="Ivan M." last="Donaldson">Ivan M. Donaldson</name><name sortKey="Donaldson, Ivan M" sort="Donaldson, Ivan M" uniqKey="Donaldson I" first="Ivan M." last="Donaldson">Ivan M. Donaldson</name><name sortKey="Timmings, Paul L" sort="Timmings, Paul L" uniqKey="Timmings P" first="Paul L." last="Timmings">Paul L. Timmings</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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