Anesthetic action on extra-synaptic receptors: effects in neural population models of EEG activity
Identifieur interne : 000868 ( Main/Exploration ); précédent : 000867; suivant : 000869Anesthetic 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 :
- Frontiers in Systems Neuroscience [ 1662-5137 ] ; 2014-11-27.
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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</tutelles>
</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>
</affiliation>
</author>
<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>
<listRelation><relation active="#struct-362126" type="direct"></relation>
</listRelation>
<tutelles><tutelle active="#struct-362126" type="direct"><org type="institution" xml:id="struct-362126" status="INCOMING"><orgName>Waikato Hospital</orgName>
<desc><address><country key="FR"></country>
</address>
</desc>
</org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>Nouvelle-Zélande</country>
</affiliation>
</author>
</analytic>
<series><title level="j">Frontiers in Systems Neuroscience</title>
<idno type="ISSN">1662-5137</idno>
<imprint><date type="datePub">2014-11-27</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass><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>
</teiHeader>
<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>
<tree><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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