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1.
Int J Rehabil Res ; 32(1): 53-63, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19077724

RESUMO

Variances of drawing arm movements between patients with Parkinson's disease and healthy controls were compared. The aim was to determine whether differences in joint synergies or individual joint rotations affect the endpoint (hand position) variance. Joint and endpoint coordinates were measured while participants performed drawing tasks. Variances of arm configurations and endpoints were computed and statistically analyzed for 12 patients and 12 controls. The variance of arm movements for patients (both for arm configuration and endpoint) was overall higher than that for the control group. Variation was smaller for drawing a circle versus a square and for drawing with the dominant versus the nondominant hand within both groups. The ratio of arm configuration variances between groups was similar to the ratio of endpoint variances. There were significant differences in the velocity, but not in the path lengths of movements comparing the two groups. Patients presented less movement stability while drawing different figures in different trials. Moreover, the similarity of the ratios suggests that the ill-coordinated hand movement was caused by the error in the movements of individual body parts rather than by the lack of intersegmental coordination. Thus, rehabilitation may focus on the improvement of the precision of individual joint rotations.


Assuntos
Braço/fisiopatologia , Mãos/fisiopatologia , Movimento/fisiologia , Doença de Parkinson/fisiopatologia , Doença de Parkinson/reabilitação , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Rotação , Análise e Desempenho de Tarefas
2.
Parkinsonism Relat Disord ; 13(7): 438-42, 2007 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-17292654

RESUMO

To investigate the time span within which bradykinesia re-occurs, we registered movement parameters immediately after the termination of deep brain stimulation of the subthalamic nucleus (STN) in nine Parkinson patients with chronically implanted bilateral STN electrodes. Two repetitive movements were investigated: finger-tapping and forearm pronation-supination. When stimulation was switched off, the amplitude and velocity of the investigated movements significantly declined, but the frequency did not. The time course of this decline was modeled by an exponential function that yielded time constants between 15 and 30s. The effect of stimulation had completely disappeared within 1 min. These results suggest that it is necessary to wait at least for 1 min after the end of stimulation before performing further assessments.


Assuntos
Terapia por Estimulação Elétrica , Hipocinesia/fisiopatologia , Doença de Parkinson/terapia , Subtálamo/fisiopatologia , Extremidade Superior/fisiopatologia , Idoso , Análise de Variância , Intervalos de Confiança , Eletromiografia , Humanos , Masculino , Pessoa de Meia-Idade , Movimento/fisiologia , Desempenho Psicomotor/fisiologia , Subtálamo/cirurgia , Fatores de Tempo
3.
Stud Health Technol Inform ; 90: 572-6, 2002.
Artigo em Inglês | MEDLINE | ID: mdl-15460758

RESUMO

We develop a diagnostic tool to support the objective diagnosis of Parkinsonians. We suggest a cost and time efficient diagnostic tool: patients may complete exercises using a personal computer at home and the data is gathered for further studies via Internet in a central database.


Assuntos
Diagnóstico por Computador , Doença de Parkinson/diagnóstico , Consulta Remota , Adulto , Estudos de Casos e Controles , Humanos , Hungria , Internet , Pessoa de Meia-Idade
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