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Anesthetic action on extra-synaptic receptors: effects in neural population models of EEG activity

Identifieur interne : 000868 ( Main/Exploration ); précédent : 000867; suivant : 000869

Anesthetic action on extra-synaptic receptors: effects in neural population models of EEG activity

Auteurs : Meysam Hashemi [France] ; Axel Hutt [France] ; Jamie Sleigh [Nouvelle-Zélande]

Source :

RBID : Hal:hal-01088062

English descriptors

Abstract

The role of extra-synaptic receptors in the regulation of excitation and inhibition in the brain has attracted increasing attention. Because activity in the extra-synaptic receptors plays a role in regulating the level of excitation and inhibition in the brain, they may be important in determining the level of consciousness. This paper reviews briefly the literature on extra-synaptic GABA and NMDA receptors and their affinity to anesthetic drugs. We propose a neural population model that illustrates how the effect of the anesthetic drug propofol on GABAergic extra- synaptic receptors results in changes in neural population activity and the electroencephalogram (EEG). Our results show that increased tonic inhibition in inhibitory cortical neurons cause a dramatic increase in the power of both δ and α bands. Conversely, the effects of increased tonic inhibition in cortical excitatory neurons and thalamic relay neurons have the opposite effect and decrease the power in these bands. The increased δ−activity is in accord with observed data for deepening propofol anesthesia; but is absolutely dependent on the inclusion of extrasynaptic (tonic) GABA action in the model.

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Le document en format XML

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<idno type="IdRef">157040569</idno>
<idno type="IdUnivLorraine">[UL]100--</idno>
<orgName>Université de Lorraine</orgName>
<orgName type="acronym">UL</orgName>
<date type="start">2012-01-01</date>
<desc>
<address>
<addrLine>34 cours Léopold - CS 25233 - 54052 Nancy cedex</addrLine>
<country key="FR"></country>
</address>
<ref type="url">http://www.univ-lorraine.fr/</ref>
</desc>
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<idno type="ISNI">0000000122597504</idno>
<idno type="IdRef">02636817X</idno>
<orgName>Centre National de la Recherche Scientifique</orgName>
<orgName type="acronym">CNRS</orgName>
<date type="start">1939-10-19</date>
<desc>
<address>
<country key="FR"></country>
</address>
<ref type="url">http://www.cnrs.fr/</ref>
</desc>
</org>
</tutelle>
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</hal:affiliation>
<country>France</country>
<placeName>
<settlement type="city">Nancy</settlement>
<settlement type="city">Metz</settlement>
<region type="region" nuts="2">Grand Est</region>
<region type="old region" nuts="2">Lorraine (région)</region>
</placeName>
<orgName type="university">Université de Lorraine</orgName>
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<author>
<name sortKey="Sleigh, Jamie" sort="Sleigh, Jamie" uniqKey="Sleigh J" first="Jamie" last="Sleigh">Jamie Sleigh</name>
<affiliation wicri:level="1">
<hal:affiliation type="laboratory" xml:id="struct-261683" status="INCOMING">
<orgName>Department of Anaesthetics</orgName>
<desc>
<address>
<addrLine>Department of Anaesthetics, Waikato Hospital, Hamilton, New Zealand</addrLine>
<country key="NZ"></country>
</address>
</desc>
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<org type="institution" xml:id="struct-362126" status="INCOMING">
<orgName>Waikato Hospital</orgName>
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<address>
<country key="FR"></country>
</address>
</desc>
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</hal:affiliation>
<country>Nouvelle-Zélande</country>
</affiliation>
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<series>
<title level="j">Frontiers in Systems Neuroscience</title>
<idno type="ISSN">1662-5137</idno>
<imprint>
<date type="datePub">2014-11-27</date>
</imprint>
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<keywords scheme="mix" xml:lang="en">
<term>GABA receptor</term>
<term>general anesthesia</term>
<term>neural mass</term>
<term>power spectrum</term>
<term>propofol</term>
</keywords>
</textClass>
</profileDesc>
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<front>
<div type="abstract" xml:lang="en">The role of extra-synaptic receptors in the regulation of excitation and inhibition in the brain has attracted increasing attention. Because activity in the extra-synaptic receptors plays a role in regulating the level of excitation and inhibition in the brain, they may be important in determining the level of consciousness. This paper reviews briefly the literature on extra-synaptic GABA and NMDA receptors and their affinity to anesthetic drugs. We propose a neural population model that illustrates how the effect of the anesthetic drug propofol on GABAergic extra- synaptic receptors results in changes in neural population activity and the electroencephalogram (EEG). Our results show that increased tonic inhibition in inhibitory cortical neurons cause a dramatic increase in the power of both δ and α bands. Conversely, the effects of increased tonic inhibition in cortical excitatory neurons and thalamic relay neurons have the opposite effect and decrease the power in these bands. The increased δ−activity is in accord with observed data for deepening propofol anesthesia; but is absolutely dependent on the inclusion of extrasynaptic (tonic) GABA action in the model.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>France</li>
<li>Nouvelle-Zélande</li>
</country>
<region>
<li>Grand Est</li>
<li>Lorraine (région)</li>
</region>
<settlement>
<li>Metz</li>
<li>Nancy</li>
</settlement>
<orgName>
<li>Université de Lorraine</li>
</orgName>
</list>
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<country name="France">
<region name="Grand Est">
<name sortKey="Hashemi, Meysam" sort="Hashemi, Meysam" uniqKey="Hashemi M" first="Meysam" last="Hashemi">Meysam Hashemi</name>
</region>
<name sortKey="Hutt, Axel" sort="Hutt, Axel" uniqKey="Hutt A" first="Axel" last="Hutt">Axel Hutt</name>
</country>
<country name="Nouvelle-Zélande">
<noRegion>
<name sortKey="Sleigh, Jamie" sort="Sleigh, Jamie" uniqKey="Sleigh J" first="Jamie" last="Sleigh">Jamie Sleigh</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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