The relation between cognition and motor dysfunction in drug-naive newly diagnosed patients with Parkinson's disease.
Identifieur interne : 003292 ( Ncbi/Checkpoint ); précédent : 003291; suivant : 003293The relation between cognition and motor dysfunction in drug-naive newly diagnosed patients with Parkinson's disease.
Auteurs : Magdalena Eriksson Domellöf [Suède] ; Eva Elgh ; Lars ForsgrenSource :
- Movement disorders : official journal of the Movement Disorder Society [ 1531-8257 ] ; 2011.
English descriptors
- KwdEn :
- Aged, Cognition Disorders (etiology), Female, Gait Disorders, Neurologic (etiology), Humans, Hypokinesia (etiology), Male, Memory (physiology), Middle Aged, Neuropsychological Tests, Parkinson Disease (complications), Regression Analysis, Sensation Disorders (etiology), Severity of Illness Index, Tremor (etiology).
- MESH :
- complications : Parkinson Disease.
- etiology : Cognition Disorders, Gait Disorders, Neurologic, Hypokinesia, Sensation Disorders, Tremor.
- physiology : Memory.
- Aged, Female, Humans, Male, Middle Aged, Neuropsychological Tests, Regression Analysis, Severity of Illness Index.
Abstract
Recent studies have reported cognitive decline to be common in the early phase of Parkinson's disease. Imaging data connect working memory and executive functioning to the dopamine system. It has also been suggested that bradykinesia is the clinical manifestation most closely related to the nigrostriatal lesion. Exploring the relationship between motor dysfunction and cognition can help us find shared or overlapping systems serving different functions. This relationship has been sparsely investigated in population-based studies of untreated Parkinson's disease. The aim of the present study was to investigate the association between motor signs and cognitive performance in the early stages of Parkinson's disease before the intake of dopaminergic medication. Patients were identified in a population-based study of incident cases with idiopathic parkinsonism. Patients with the postural instability and gait disturbances phenotype were compared with patients with the tremor-dominant phenotype on demographics and cognitive measures. Associations between cognitive and motor scores were investigated, with age, education, and sex controlled for. Bradykinesia was associated with working memory and mental flexibility, whereas axial signs were associated with episodic memory and visuospatial functioning. No significant differences in the neuropsychological variables were found between the postural instability and gait disturbances phenotype and the tremor phenotype. Our results indicate a shared system for slow movement and inflexible thinking that may be controlled by a dopaminergic network different from dopaminergic networks involved in tremor and/or rigidity. The association between axial signs and memory and visuospatial function may point to overlapping systems or pathologies related to these abilities.
DOI: 10.1002/mds.23814
PubMed: 21661051
Affiliations:
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Imaging data connect working memory and executive functioning to the dopamine system. It has also been suggested that bradykinesia is the clinical manifestation most closely related to the nigrostriatal lesion. Exploring the relationship between motor dysfunction and cognition can help us find shared or overlapping systems serving different functions. This relationship has been sparsely investigated in population-based studies of untreated Parkinson's disease. The aim of the present study was to investigate the association between motor signs and cognitive performance in the early stages of Parkinson's disease before the intake of dopaminergic medication. Patients were identified in a population-based study of incident cases with idiopathic parkinsonism. Patients with the postural instability and gait disturbances phenotype were compared with patients with the tremor-dominant phenotype on demographics and cognitive measures. Associations between cognitive and motor scores were investigated, with age, education, and sex controlled for. Bradykinesia was associated with working memory and mental flexibility, whereas axial signs were associated with episodic memory and visuospatial functioning. No significant differences in the neuropsychological variables were found between the postural instability and gait disturbances phenotype and the tremor phenotype. Our results indicate a shared system for slow movement and inflexible thinking that may be controlled by a dopaminergic network different from dopaminergic networks involved in tremor and/or rigidity. The association between axial signs and memory and visuospatial function may point to overlapping systems or pathologies related to these abilities.</div></front></TEI><affiliations><list><country><li>Suède</li></country></list><tree><noCountry><name sortKey="Elgh, Eva" sort="Elgh, Eva" uniqKey="Elgh E" first="Eva" last="Elgh">Eva Elgh</name><name sortKey="Forsgren, Lars" sort="Forsgren, Lars" uniqKey="Forsgren L" first="Lars" last="Forsgren">Lars Forsgren</name></noCountry><country name="Suède"><noRegion><name sortKey="Domellof, Magdalena Eriksson" sort="Domellof, Magdalena Eriksson" uniqKey="Domellof M" first="Magdalena Eriksson" last="Domellöf">Magdalena Eriksson Domellöf</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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