Summary
The Motor Performance Test Series (MPTS) is widely used for treatment control in Parkinson's disease (PD). To elucidate the possible influence of depression on the fine motor skills in PD, 54 patients with idiopathic PD were investigated with the MPTS. 27 patients with major intensity of depression were compared to 27 age and motor disability matched patients with minor symptoms of depression, evaluated by the Zung depression scale. As determined by the subtest aiming, a significant lower ability for precise, quick complex arm-hand movements in depressed Parkinsonian patients was found. This result may be explained partly by motivation deficits in depressed patients with PD. On the other hand impairment of special motor loops including frontal lobe projections to specific thalamic subnuclei or to the caudate nucleus may cause disturbances of the subtest aiming in depressed Parkinsonian patients. On the basis of these findings impaired aiming may be explained by diminished ability for complex, semivoluntary movements in depressive Parkinsonian patients. The influence of psychiatric comorbidity on MPTS subtest aiming has to be considered in further therapy studies using evaluation of motor deficits by MPTS.
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Kuhn, W., Heye, N., Müller, T. et al. The motor performance test series in Parkinson's disease is influenced by depression. J. Neural Transmission 103, 349–354 (1996). https://doi.org/10.1007/BF01271246
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DOI: https://doi.org/10.1007/BF01271246