MersV1, Main, Exploration, bibRecord, 002958

Prior pallidotomy reduces and modifies neuronal activity in the subthalamic nucleus of Parkinson's disease patients.

Identifieur interne : 002958 ( Main/Exploration ); précédent : 002957; suivant : 002959

Prior pallidotomy reduces and modifies neuronal activity in the subthalamic nucleus of Parkinson's disease patients.

Auteurs : A. Zaidel [Israël] ; A. Moran ; G. Marjan ; H. Bergman ; Z. Israel

Source :

The European journal of neuroscience [ 1460-9568 ] ; 2008.

RBID : pubmed:18215242

Descripteurs français

KwdFr :
- Adulte, Adulte d'âge moyen, Facteurs temps, Femelle, Globus pallidus (), Globus pallidus (physiologie), Humains, Maladie de Parkinson (), Maladie de Parkinson (physiopathologie), Mâle, Neurones (physiologie), Noyau subthalamique (physiologie), Pallidotomie, Réseau nerveux (physiologie), Sujet âgé.
MESH :
- physiologie : Globus pallidus, Neurones, Noyau subthalamique, Réseau nerveux.
- physiopathologie : Maladie de Parkinson.
- Adulte, Adulte d'âge moyen, Facteurs temps, Femelle, Globus pallidus, Humains, Maladie de Parkinson, Mâle, Pallidotomie, Sujet âgé.

English descriptors

KwdEn :
- Adult, Aged, Female, Globus Pallidus (physiology), Globus Pallidus (surgery), Humans, Male, Middle Aged, Nerve Net (physiology), Neurons (physiology), Pallidotomy, Parkinson Disease (physiopathology), Parkinson Disease (surgery), Subthalamic Nucleus (physiology), Time Factors.
MESH :
- physiology : Globus Pallidus, Nerve Net, Neurons, Subthalamic Nucleus.
- physiopathology : Parkinson Disease.
- surgery : Globus Pallidus, Parkinson Disease.
- Adult, Aged, Female, Humans, Male, Middle Aged, Pallidotomy, Time Factors.

Abstract

Parkinson's disease (PD) patients with prior radio-frequency lesions in the internal segment of the globus pallidus (GPi, pallidotomy), whose symptoms have deteriorated, may be candidates for further invasive treatment such as subthalamic deep brain stimulation (STN DBS). Six patients with prior pallidotomy (five unilaterally; one bilaterally) underwent bilateral STN DBS. The microelectrode recordings (MERs, used intraoperatively for STN verification), ipsilateral and contralateral to pallidotomy, and MERs from 11 matched PD patients who underwent bilateral STN DBS without prior pallidotomy were compared. For each trajectory, average, variance and mean successive difference (MSD, a measure of irregularity) of the root mean square (RMS) of the STN MER were calculated. The RMS in trajectories ipsilateral to pallidotomy showed significant reduction of the mean average and MSD of STN activity when compared with trajectories from patients without prior pallidotomy. The RMS parameters contralateral to pallidotomy tend to lie between those ipsilateral to pallidotomy and those without prior pallidotomy. The average STN power spectral density of oscillatory activity was notably lower ipsilateral to pallidotomy than contralateral, or without prior pallidotomy. The finding that pallidotomy reduces STN activity and changes firing characteristics, in conjunction with the effectiveness of STN DBS despite prior pallidotomy, calls for reappraisal and modification of the current model of the basal ganglia (BG) cortical network. It highlights the critical role of direct projections from the BG to brain-stem structures and suggests a possible GPi-STN reciprocal positive-feedback mechanism.

DOI: 10.1111/j.1460-9568.2008.06019.x
PubMed: 18215242

Affiliations:

Israël

Le document en format XML

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<front><div type="abstract" xml:lang="en">Parkinson's disease (PD) patients with prior radio-frequency lesions in the internal segment of the globus pallidus (GPi, pallidotomy), whose symptoms have deteriorated, may be candidates for further invasive treatment such as subthalamic deep brain stimulation (STN DBS). Six patients with prior pallidotomy (five unilaterally; one bilaterally) underwent bilateral STN DBS. The microelectrode recordings (MERs, used intraoperatively for STN verification), ipsilateral and contralateral to pallidotomy, and MERs from 11 matched PD patients who underwent bilateral STN DBS without prior pallidotomy were compared. For each trajectory, average, variance and mean successive difference (MSD, a measure of irregularity) of the root mean square (RMS) of the STN MER were calculated. The RMS in trajectories ipsilateral to pallidotomy showed significant reduction of the mean average and MSD of STN activity when compared with trajectories from patients without prior pallidotomy. The RMS parameters contralateral to pallidotomy tend to lie between those ipsilateral to pallidotomy and those without prior pallidotomy. The average STN power spectral density of oscillatory activity was notably lower ipsilateral to pallidotomy than contralateral, or without prior pallidotomy. The finding that pallidotomy reduces STN activity and changes firing characteristics, in conjunction with the effectiveness of STN DBS despite prior pallidotomy, calls for reappraisal and modification of the current model of the basal ganglia (BG) cortical network. It highlights the critical role of direct projections from the BG to brain-stem structures and suggests a possible GPi-STN reciprocal positive-feedback mechanism.</div>
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Serveur d'exploration MERS

Prior pallidotomy reduces and modifies neuronal activity in the subthalamic nucleus of Parkinson's disease patients.

Prior pallidotomy reduces and modifies neuronal activity in the subthalamic nucleus of Parkinson's disease patients.

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

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