The offset cortical potential: An electrical correlate of movement inhibition in man
Identifieur interne : 004E86 ( Main/Exploration ); précédent : 004E85; suivant : 004E87The offset cortical potential: An electrical correlate of movement inhibition in man
Auteurs : Rothwell ; Kazuo Higuchi ; Jose A. Obeso [Espagne]Source :
- Movement Disorders [ 0885-3185 ] ; 1998-03.
English descriptors
- KwdEn :
- Adult, Arousal (physiology), Attention (physiology), Bereitschaftspotential, Brain Mapping, Cerebral Cortex (physiology), Dominance, Cerebral (physiology), Electroencephalography, Electromyography, Evoked Potentials (physiology), Female, Hand Strength (physiology), Humans, Isometric Contraction (physiology), Male, Middle Aged, Motor inhibition, Neural Inhibition (physiology), Reference Values, Signal Processing, Computer-Assisted.
- MESH :
- physiology : Arousal, Attention, Cerebral Cortex, Dominance, Cerebral, Evoked Potentials, Hand Strength, Isometric Contraction, Neural Inhibition.
- Adult, Brain Mapping, Electroencephalography, Electromyography, Female, Humans, Male, Middle Aged, Reference Values, Signal Processing, Computer-Assisted.
Abstract
Nine normal subjects were asked to make either a brisk isometric pinch of a force transducer held between the forefinger and thumb, or to hold a pinch for approximately 15 s and then release the force suddenly without any overt antagonist contraction. EEG activity was averaged about the onset or offset of EMG activity, and movements were made in the subjects' own time. All subjects found the task simple. The EEG activity preceding offset of contraction (offset cortical potential) was significantly smaller in lateral leads than that seen before onset of contraction. Midline activation was similar in both tasks. We suggest that in the onset task, motor cortex activity related to the act to be performed contributes substantially to the EEG potentials in lateral leads. This activity is absent in the offset task which requires only withdrawal of tonic input to motor cortex. Midline activity, common to both onset and offset tasks, could reflect timing, attentional, or other processes. The results are discussed in relation to previous data from an isotonic relaxation task1.
Url:
DOI: 10.1002/mds.870130221
Affiliations:
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Obeso</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:3F0ACF967424AAE59CAB3D4124F0382F808BBB58</idno><date when="1998" year="1998">1998</date><idno type="doi">10.1002/mds.870130221</idno><idno type="url">https://api.istex.fr/document/3F0ACF967424AAE59CAB3D4124F0382F808BBB58/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002981</idno><idno type="wicri:Area/Istex/Curation">002981</idno><idno type="wicri:Area/Istex/Checkpoint">003621</idno><idno type="wicri:doubleKey">0885-3185:1998:Rothwell:the:offset:cortical</idno><idno type="wicri:source">PubMed</idno><idno type="RBID">pubmed:9539349</idno><idno type="wicri:Area/PubMed/Corpus">004463</idno><idno type="wicri:Area/PubMed/Curation">004463</idno><idno type="wicri:Area/PubMed/Checkpoint">004319</idno><idno type="wicri:Area/Ncbi/Merge">004F20</idno><idno type="wicri:Area/Ncbi/Curation">004F20</idno><idno type="wicri:Area/Ncbi/Checkpoint">004F20</idno><idno type="wicri:doubleKey">0885-3185:1998:Rothwell J:the:offset:cortical</idno><idno type="wicri:Area/Main/Merge">007D98</idno><idno type="wicri:Area/Main/Curation">004E86</idno><idno type="wicri:Area/Main/Exploration">004E86</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">The offset cortical potential: An electrical correlate of movement inhibition in man</title><author><name sortKey="Rothwell" sort="Rothwell" uniqKey="Rothwell" last="Rothwell">Rothwell</name><affiliation><wicri:noCountry code="subField">London UK</wicri:noCountry></affiliation></author><author><name sortKey="Higuchi, Kazuo" sort="Higuchi, Kazuo" uniqKey="Higuchi K" first="Kazuo" last="Higuchi">Kazuo Higuchi</name><affiliation><wicri:noCountry code="subField">Mie 514‐01 Japan</wicri:noCountry></affiliation></author><author><name sortKey="Obeso, Jose A" sort="Obeso, Jose A" uniqKey="Obeso J" first="Jose A." last="Obeso">Jose A. Obeso</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Clinica Quiron Donostia, Parque Alcolea, 20012 San Sebastian</wicri:regionArea><placeName><region nuts="2" type="communauté">Pays basque</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="1998-03">1998-03</date><biblScope unit="vol">13</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="330">330</biblScope><biblScope unit="page" to="335">335</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">3F0ACF967424AAE59CAB3D4124F0382F808BBB58</idno><idno type="DOI">10.1002/mds.870130221</idno><idno type="ArticleID">MDS870130221</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Arousal (physiology)</term><term>Attention (physiology)</term><term>Bereitschaftspotential</term><term>Brain Mapping</term><term>Cerebral Cortex (physiology)</term><term>Dominance, Cerebral (physiology)</term><term>Electroencephalography</term><term>Electromyography</term><term>Evoked Potentials (physiology)</term><term>Female</term><term>Hand Strength (physiology)</term><term>Humans</term><term>Isometric Contraction (physiology)</term><term>Male</term><term>Middle Aged</term><term>Motor inhibition</term><term>Neural Inhibition (physiology)</term><term>Reference Values</term><term>Signal Processing, Computer-Assisted</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Arousal</term><term>Attention</term><term>Cerebral Cortex</term><term>Dominance, Cerebral</term><term>Evoked Potentials</term><term>Hand Strength</term><term>Isometric Contraction</term><term>Neural Inhibition</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Brain Mapping</term><term>Electroencephalography</term><term>Electromyography</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Reference Values</term><term>Signal Processing, Computer-Assisted</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Nine normal subjects were asked to make either a brisk isometric pinch of a force transducer held between the forefinger and thumb, or to hold a pinch for approximately 15 s and then release the force suddenly without any overt antagonist contraction. EEG activity was averaged about the onset or offset of EMG activity, and movements were made in the subjects' own time. All subjects found the task simple. The EEG activity preceding offset of contraction (offset cortical potential) was significantly smaller in lateral leads than that seen before onset of contraction. Midline activation was similar in both tasks. We suggest that in the onset task, motor cortex activity related to the act to be performed contributes substantially to the EEG potentials in lateral leads. This activity is absent in the offset task which requires only withdrawal of tonic input to motor cortex. Midline activity, common to both onset and offset tasks, could reflect timing, attentional, or other processes. The results are discussed in relation to previous data from an isotonic relaxation task1.</div></front></TEI><affiliations><list><country><li>Espagne</li></country><region><li>Pays basque</li></region></list><tree><noCountry><name sortKey="Higuchi, Kazuo" sort="Higuchi, Kazuo" uniqKey="Higuchi K" first="Kazuo" last="Higuchi">Kazuo Higuchi</name><name sortKey="Rothwell" sort="Rothwell" uniqKey="Rothwell" last="Rothwell">Rothwell</name></noCountry><country name="Espagne"><region name="Pays basque"><name sortKey="Obeso, Jose A" sort="Obeso, Jose A" uniqKey="Obeso J" first="Jose A." last="Obeso">Jose A. Obeso</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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