Frequency dependent effects of subthalamic nucleus stimulation in Parkinson's disease.
Neurosci Lett
; 382(1-2): 5-9, 2005.
Article
em En
| MEDLINE
| ID: mdl-15911112
ABSTRACT
Excessive synchronisation of basal ganglia activity at frequencies < 30 Hz is a hallmark of the parkinsonian state, and may contribute to bradykinesia. Accordingly, we electrically stimulated chronically implanted subthalamic macroelectrodes in 10 Parkinson's disease patients, after overnight withdrawal of anti-parkinsonian medication. We compared the effects of stimulation at 0, 5, 10, 15, 20, 25, 30, and ca. 130 Hz by measuring kinesia time (KT) in a tapping task. Although the effects of direct stimulation were small, frequency-response curves demonstrated local peaks at 5-10 Hz and at 20-25 Hz, superimposed upon an overall tendency for KT to reduce with increasing stimulation frequency. This is consistent with the hypothesis that spontaneous activities in these bands might promote bradykinesia.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doença de Parkinson
/
Núcleo Subtalâmico
/
Estimulação Encefálica Profunda
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article