MovDisordV3, Main, Exploration, bibRecordById, ISTEX:8CA2E93369E6B95C18F545A4DE0862813487A177

Abnormalities of tracking behavior in Parkinson's disease

Identifieur interne : 005954 ( Main/Exploration ); précédent : 005953; suivant : 005955

Abnormalities of tracking behavior in Parkinson's disease

Auteurs : Hufschmidt [Allemagne] ; Carl-Herrmann Lücking [Allemagne]

Source :

Movement Disorders [ 0885-3185 ] ; 1995-05.

RBID : ISTEX:8CA2E93369E6B95C18F545A4DE0862813487A177

English descriptors

KwdEn :
- Adult, Aged, Aged, 80 and over, Akinesia, Attention (physiology), Female, Humans, Male, Middle Aged, Movement Disorders (diagnosis), Movement Disorders (physiopathology), Neurologic Examination, Orientation (physiology), Parkinson Disease (diagnosis), Parkinson Disease (physiopathology), Parkinson's disease, Pursuit, Smooth (physiology), Reaction Time (physiology), Reference Values, Tracking.
MESH :
- diagnosis : Movement Disorders, Parkinson Disease.
- physiology : Attention, Orientation, Pursuit, Smooth, Reaction Time.
- physiopathology : Movement Disorders, Parkinson Disease.
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Neurologic Examination, Reference Values.

Abstract

Tracking behavior in Parkinsonian patients and in a control group of elderly subjects was studied using a one‐dimensional pursuit tracking task. The most obvious abnormality in patients with Parkinson's disease is a tendency to restrict movements to a limited range, thus “clipping” the extreme deviations of the target, reflected by movement arrests, reduced amplitude gain, and decreased velocity gain. Most of the tracking parameters were selectively sensitive to parkinsonian as opposed to age‐related impairment of motor functions, the only exception being directional errors, which were more frequent in the old age group. Movement range and amplitude gain were related to general disability as reflected by the Hoehn and Yahr stage. Amplitude gain was also the single factor with the strongest influence on tracking error and was smaller for large target deviations in both groups. A reduction in target velocity caused a significant increase in amplitude gain, suggesting a compensatory strategy (amplitude/lag trade‐off) as one possible cause of low‐amplitude gain. Decreased peak velocity did not contribute significantly to tracking error. These findings suggest that reduced movement amplitude and slowness are independent phenomena, of which only the former has a significant influence on tracking performance in the task used. Patients with Parkinson's disease showed no impairment of motor learning on this task.

Url:

https://api.istex.fr/document/8CA2E93369E6B95C18F545A4DE0862813487A177/fulltext/pdf

DOI: 10.1002/mds.870100306

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Tracking behavior in Parkinsonian patients and in a control group of elderly subjects was studied using a one‐dimensional pursuit tracking task. The most obvious abnormality in patients with Parkinson's disease is a tendency to restrict movements to a limited range, thus “clipping” the extreme deviations of the target, reflected by movement arrests, reduced amplitude gain, and decreased velocity gain. Most of the tracking parameters were selectively sensitive to parkinsonian as opposed to age‐related impairment of motor functions, the only exception being directional errors, which were more frequent in the old age group. Movement range and amplitude gain were related to general disability as reflected by the Hoehn and Yahr stage. Amplitude gain was also the single factor with the strongest influence on tracking error and was smaller for large target deviations in both groups. A reduction in target velocity caused a significant increase in amplitude gain, suggesting a compensatory strategy (amplitude/lag trade‐off) as one possible cause of low‐amplitude gain. Decreased peak velocity did not contribute significantly to tracking error. These findings suggest that reduced movement amplitude and slowness are independent phenomena, of which only the former has a significant influence on tracking performance in the task used. Patients with Parkinson's disease showed no impairment of motor learning on this task.</div>
</front>
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Movement Disorders (revue)

Abnormalities of tracking behavior in Parkinson's disease

Abnormalities of tracking behavior in Parkinson's disease

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Movement Disorders (revue)
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.