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The influence of posture duration on hand tremor during tasks with attention-distraction in persons with Parkinson's disease.


ABSTRACT: BACKGROUND:Tremor is one of the hallmarks and most bothersome symptoms in Parkinson's disease (PD). The classical PD tremor is present at rest, but postural tremor also occurs. PD tremor can be continuous or intermittently present and can have a re-emergent nature. The tremor intensity is affected by attention and stress level. Observations of PD tremor have indicated increased tremor intensity with time during 30-s tremor assessments. This phenomenon has not previously been studied systematically. Thus, in order to contribute to our understanding of the mechanisms associated with PD tremor, our aim was to investigate the influence of time during a posture holding and a resting task on hand tremor characteristics in persons with PD compared to healthy peers. METHOD:Fifty persons with PD and at least one tremoring hand (tremor intensity exceeding mean?+?2SD of a healthy reference group (REF), N?=?40) were included from a clinical trial population. Hand accelerations in a rest and postural condition were measured in 30-s assessments while the participants performed a self-paced simple subtraction task with eyes closed to standardize attention without inducing stress. Tremor intensity, maximal power, frequency of maximal power and tremor onset time was calculated for three consecutive 10-s time intervals. RESULTS:Tremor intensity and maximal power increased significantly during the 30-s recording in the PD-group in both conditions (1st-3rd time-interval, tremor intensity: rest +?65% p?

SUBMITTER: Malling ASB 

PROVIDER: S-EPMC6537174 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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The influence of posture duration on hand tremor during tasks with attention-distraction in persons with Parkinson's disease.

Malling Anne Sofie Bøgh ASB   Morberg Bo Mohr BM   Wermuth Lene L   Gredal Ole O   Bech Per P   Jensen Bente Rona BR  

Journal of neuroengineering and rehabilitation 20190528 1


<h4>Background</h4>Tremor is one of the hallmarks and most bothersome symptoms in Parkinson's disease (PD). The classical PD tremor is present at rest, but postural tremor also occurs. PD tremor can be continuous or intermittently present and can have a re-emergent nature. The tremor intensity is affected by attention and stress level. Observations of PD tremor have indicated increased tremor intensity with time during 30-s tremor assessments. This phenomenon has not previously been studied syst  ...[more]

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