Reaction time is not impaired by stimulation of the ventral-intermediate nucleus of the thalamus (Vim) in patients with tremor.
Identifieur interne : 003A63 ( PubMed/Corpus ); précédent : 003A62; suivant : 003A64Reaction time is not impaired by stimulation of the ventral-intermediate nucleus of the thalamus (Vim) in patients with tremor.
Auteurs : Didier Flament ; Mark B. Shapiro ; Kerstin D. Pfann ; Charity G. Moore ; Richard D. Penn ; Daniel M. CorcosSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2002.
English descriptors
- KwdEn :
- Aged, Electric Stimulation Therapy (adverse effects), Electrodes, Implanted, Female, Humans, Male, Middle Aged, Parkinson Disease (physiopathology), Parkinson Disease (therapy), Proprioception, Reaction Time, Task Performance and Analysis, Tremor (physiopathology), Tremor (therapy), Ventral Thalamic Nuclei.
- MESH :
- adverse effects : Electric Stimulation Therapy.
- physiopathology : Parkinson Disease, Tremor.
- therapy : Parkinson Disease, Tremor.
- Aged, Electrodes, Implanted, Female, Humans, Male, Middle Aged, Proprioception, Reaction Time, Task Performance and Analysis, Ventral Thalamic Nuclei.
Abstract
We studied the effect of high-frequency electrical stimulation of the ventral-intermediate nucleus of the thalamus (Vim) in four patients implanted with chronic stimulators to determine whether this procedure adversely affects reaction time to a proprioceptive stimulus. Two patients had undergone this surgery for treatment of tremor resulting from Parkinson's disease insufficiently responsive to levodopa therapy and two patients for treatment of essential tremor. Reaction times to auditory, visual, cutaneous, and proprioceptive stimuli were tested in a simple motor task requiring flexion of the elbow joint to a visual target in response to each stimulus. Reaction times were tested postoperatively with and without the stimulator turned on. We found that reaction time for all stimulus modalities was not increased when the stimulator was turned on; in fact, reaction times were, on average, slightly shorter during stimulation, but this difference was not statistically significant. We conclude that transmission of somatosensory inputs, necessary for initiating voluntary movement, from the periphery to the cortex is not significantly impaired by stimulation of the ventral-intermediate nucleus of the thalamus in patients with pathological tremor.
DOI: 10.1002/mds.10120
PubMed: 12112195
Links to Exploration step
pubmed:12112195Le document en format XML
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<author><name sortKey="Shapiro, Mark B" sort="Shapiro, Mark B" uniqKey="Shapiro M" first="Mark B" last="Shapiro">Mark B. Shapiro</name>
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<author><name sortKey="Pfann, Kerstin D" sort="Pfann, Kerstin D" uniqKey="Pfann K" first="Kerstin D" last="Pfann">Kerstin D. Pfann</name>
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<author><name sortKey="Moore, Charity G" sort="Moore, Charity G" uniqKey="Moore C" first="Charity G" last="Moore">Charity G. Moore</name>
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<author><name sortKey="Penn, Richard D" sort="Penn, Richard D" uniqKey="Penn R" first="Richard D" last="Penn">Richard D. Penn</name>
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<front><div type="abstract" xml:lang="en">We studied the effect of high-frequency electrical stimulation of the ventral-intermediate nucleus of the thalamus (Vim) in four patients implanted with chronic stimulators to determine whether this procedure adversely affects reaction time to a proprioceptive stimulus. Two patients had undergone this surgery for treatment of tremor resulting from Parkinson's disease insufficiently responsive to levodopa therapy and two patients for treatment of essential tremor. Reaction times to auditory, visual, cutaneous, and proprioceptive stimuli were tested in a simple motor task requiring flexion of the elbow joint to a visual target in response to each stimulus. Reaction times were tested postoperatively with and without the stimulator turned on. We found that reaction time for all stimulus modalities was not increased when the stimulator was turned on; in fact, reaction times were, on average, slightly shorter during stimulation, but this difference was not statistically significant. We conclude that transmission of somatosensory inputs, necessary for initiating voluntary movement, from the periphery to the cortex is not significantly impaired by stimulation of the ventral-intermediate nucleus of the thalamus in patients with pathological tremor.</div>
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<Abstract><AbstractText>We studied the effect of high-frequency electrical stimulation of the ventral-intermediate nucleus of the thalamus (Vim) in four patients implanted with chronic stimulators to determine whether this procedure adversely affects reaction time to a proprioceptive stimulus. Two patients had undergone this surgery for treatment of tremor resulting from Parkinson's disease insufficiently responsive to levodopa therapy and two patients for treatment of essential tremor. Reaction times to auditory, visual, cutaneous, and proprioceptive stimuli were tested in a simple motor task requiring flexion of the elbow joint to a visual target in response to each stimulus. Reaction times were tested postoperatively with and without the stimulator turned on. We found that reaction time for all stimulus modalities was not increased when the stimulator was turned on; in fact, reaction times were, on average, slightly shorter during stimulation, but this difference was not statistically significant. We conclude that transmission of somatosensory inputs, necessary for initiating voluntary movement, from the periphery to the cortex is not significantly impaired by stimulation of the ventral-intermediate nucleus of the thalamus in patients with pathological tremor.</AbstractText>
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