Differences in neuronal firing rates in pallidal and cerebellar receiving areas of thalamus in patients with Parkinson's disease, essential tremor, and pain.
Identifieur interne : 002986 ( Main/Curation ); précédent : 002985; suivant : 002987Differences in neuronal firing rates in pallidal and cerebellar receiving areas of thalamus in patients with Parkinson's disease, essential tremor, and pain.
Auteurs : G F Molnar [Canada] ; A. Pilliar ; A M Lozano ; J O DostrovskySource :
- Journal of neurophysiology [ 0022-3077 ] ; 2005.
English descriptors
- KwdEn :
- Action Potentials (physiology), Aged, Brain Mapping, Cerebellum (pathology), Cerebellum (physiopathology), Essential Tremor (physiopathology), Female, Globus Pallidus (pathology), Globus Pallidus (physiopathology), Humans, Male, Middle Aged, Movement (physiology), Neural Pathways (physiopathology), Neurons (classification), Neurons (physiology), Pain (physiopathology), Parkinson Disease (physiopathology), Thalamus (pathology), Thalamus (physiopathology).
- MESH :
- classification : Neurons.
- pathology : Cerebellum, Globus Pallidus, Thalamus.
- physiology : Action Potentials, Movement, Neurons.
- physiopathology : Cerebellum, Essential Tremor, Globus Pallidus, Neural Pathways, Pain, Parkinson Disease, Thalamus.
- Aged, Brain Mapping, Female, Humans, Male, Middle Aged.
Abstract
The motor symptoms of Parkinson's disease (PD) are thought to result from increased inhibitory outflow from the basal ganglia to the pallidal receiving areas of thalamus (ventral oral anterior and posterior-Voa,Vop). To test this hypothesis, we examined the firing rates of neurons in pallidal and cerebellar receiving areas of thalamus in five PD patients and compared them to those of neurons in comparable regions of motor thalamus in two other patient groups where hyperactivity of GPi is not believed to occur [essential tremor (ET), pain]. Neuronal recordings were made during microelectrode-guided functional stereotactic neurosurgery. The mean spontaneous firing rate (MSFR) of neurons classified as voluntary neurons and presumed to be in pallidal receiving areas of thalamus in PD patients [7.4 +/- 1.0 (SE) Hz] was significantly lower (P < 0.01) than in the ET (18.1 +/- 3.0 Hz) and pain (19.0 +/- 1.9Hz) groups. In contrast, the MSFR of neurons classified as kinesthetic and presumed to be primarily in the cerebellar receiving area of thalamus (ventral intermediate-Vim), although some are probably in the deep shell region of the ventrocaudal nucleus (VPLa), was significantly greater in ET patients (25.8 +/- 3.5 Hz) than in the PD (14.3 +/- 1.6 Hz; P < 0.01) and pain (16.1 +/- 1.5 Hz; P < 0.05) groups. Similar findings were obtained when the neurons were grouped according to their estimated locations in Voa/Vop and Vim of motor thalamus. These data provide support for the prediction of the classical pathophysiological model of PD and moreover suggest that pathophysiology in the cerebello-thalamo-cortical pathway may be a possible cause of tremor in ET patients.
DOI: 10.1152/jn.00881.2004
PubMed: 15703231
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Pilliar</name></author><author><name sortKey="Lozano, A M" sort="Lozano, A M" uniqKey="Lozano A" first="A M" last="Lozano">A M Lozano</name></author><author><name sortKey="Dostrovsky, J O" sort="Dostrovsky, J O" uniqKey="Dostrovsky J" first="J O" last="Dostrovsky">J O Dostrovsky</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2005">2005</date><idno type="RBID">pubmed:15703231</idno><idno type="pmid">15703231</idno><idno type="doi">10.1152/jn.00881.2004</idno><idno type="wicri:Area/PubMed/Corpus">001262</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">001262</idno><idno type="wicri:Area/PubMed/Curation">001262</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">001262</idno><idno type="wicri:Area/PubMed/Checkpoint">001262</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">001262</idno><idno type="wicri:Area/Ncbi/Merge">000496</idno><idno type="wicri:Area/Ncbi/Curation">000496</idno><idno type="wicri:Area/Ncbi/Checkpoint">000496</idno><idno type="wicri:doubleKey">0022-3077:2005:Molnar G:differences:in:neuronal</idno><idno type="wicri:Area/Main/Merge">002D10</idno><idno type="wicri:Area/Main/Curation">002986</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Differences in neuronal firing rates in pallidal and cerebellar receiving areas of thalamus in patients with Parkinson's disease, essential tremor, and pain.</title><author><name sortKey="Molnar, G F" sort="Molnar, G F" uniqKey="Molnar G" first="G F" last="Molnar">G F Molnar</name><affiliation wicri:level="4"><nlm:affiliation>Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Institute of Medical Science, University of Toronto, Toronto, ON M5S 1A8</wicri:regionArea><orgName type="university">Université de Toronto</orgName><placeName><settlement type="city">Toronto</settlement><region type="state">Ontario</region></placeName></affiliation></author><author><name sortKey="Pilliar, A" sort="Pilliar, A" uniqKey="Pilliar A" first="A" last="Pilliar">A. Pilliar</name></author><author><name sortKey="Lozano, A M" sort="Lozano, A M" uniqKey="Lozano A" first="A M" last="Lozano">A M Lozano</name></author><author><name sortKey="Dostrovsky, J O" sort="Dostrovsky, J O" uniqKey="Dostrovsky J" first="J O" last="Dostrovsky">J O Dostrovsky</name></author></analytic><series><title level="j">Journal of neurophysiology</title><idno type="ISSN">0022-3077</idno><imprint><date when="2005" type="published">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Action Potentials (physiology)</term><term>Aged</term><term>Brain Mapping</term><term>Cerebellum (pathology)</term><term>Cerebellum (physiopathology)</term><term>Essential Tremor (physiopathology)</term><term>Female</term><term>Globus Pallidus (pathology)</term><term>Globus Pallidus (physiopathology)</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Movement (physiology)</term><term>Neural Pathways (physiopathology)</term><term>Neurons (classification)</term><term>Neurons (physiology)</term><term>Pain (physiopathology)</term><term>Parkinson Disease (physiopathology)</term><term>Thalamus (pathology)</term><term>Thalamus (physiopathology)</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Neurons</term></keywords><keywords scheme="MESH" qualifier="pathology" xml:lang="en"><term>Cerebellum</term><term>Globus Pallidus</term><term>Thalamus</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Action Potentials</term><term>Movement</term><term>Neurons</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Cerebellum</term><term>Essential Tremor</term><term>Globus Pallidus</term><term>Neural Pathways</term><term>Pain</term><term>Parkinson Disease</term><term>Thalamus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Brain Mapping</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The motor symptoms of Parkinson's disease (PD) are thought to result from increased inhibitory outflow from the basal ganglia to the pallidal receiving areas of thalamus (ventral oral anterior and posterior-Voa,Vop). To test this hypothesis, we examined the firing rates of neurons in pallidal and cerebellar receiving areas of thalamus in five PD patients and compared them to those of neurons in comparable regions of motor thalamus in two other patient groups where hyperactivity of GPi is not believed to occur [essential tremor (ET), pain]. Neuronal recordings were made during microelectrode-guided functional stereotactic neurosurgery. The mean spontaneous firing rate (MSFR) of neurons classified as voluntary neurons and presumed to be in pallidal receiving areas of thalamus in PD patients [7.4 +/- 1.0 (SE) Hz] was significantly lower (P < 0.01) than in the ET (18.1 +/- 3.0 Hz) and pain (19.0 +/- 1.9Hz) groups. In contrast, the MSFR of neurons classified as kinesthetic and presumed to be primarily in the cerebellar receiving area of thalamus (ventral intermediate-Vim), although some are probably in the deep shell region of the ventrocaudal nucleus (VPLa), was significantly greater in ET patients (25.8 +/- 3.5 Hz) than in the PD (14.3 +/- 1.6 Hz; P < 0.01) and pain (16.1 +/- 1.5 Hz; P < 0.05) groups. Similar findings were obtained when the neurons were grouped according to their estimated locations in Voa/Vop and Vim of motor thalamus. These data provide support for the prediction of the classical pathophysiological model of PD and moreover suggest that pathophysiology in the cerebello-thalamo-cortical pathway may be a possible cause of tremor in ET patients.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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