Modulation of artificial whisking related signals in barrel cortex
Identifieur interne : 003532 ( Ncbi/Curation ); précédent : 003531; suivant : 003533Modulation of artificial whisking related signals in barrel cortex
Auteurs : Manuel A. Castro-Alamancos ; Tatiana BezdudnayaSource :
- Journal of Neurophysiology [ 0022-3077 ] ; 2014.
Abstract
Rats use rhythmic whisker movements, called
Url:
DOI: 10.1152/jn.00809.2014
PubMed: 25505118
PubMed Central: 4346718
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PMC:4346718Le document en format XML
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<author><name sortKey="Castro Alamancos, Manuel A" sort="Castro Alamancos, Manuel A" uniqKey="Castro Alamancos M" first="Manuel A." last="Castro-Alamancos">Manuel A. Castro-Alamancos</name>
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<author><name sortKey="Bezdudnaya, Tatiana" sort="Bezdudnaya, Tatiana" uniqKey="Bezdudnaya T" first="Tatiana" last="Bezdudnaya">Tatiana Bezdudnaya</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Modulation of artificial whisking related signals in barrel cortex</title>
<author><name sortKey="Castro Alamancos, Manuel A" sort="Castro Alamancos, Manuel A" uniqKey="Castro Alamancos M" first="Manuel A." last="Castro-Alamancos">Manuel A. Castro-Alamancos</name>
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<author><name sortKey="Bezdudnaya, Tatiana" sort="Bezdudnaya, Tatiana" uniqKey="Bezdudnaya T" first="Tatiana" last="Bezdudnaya">Tatiana Bezdudnaya</name>
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<series><title level="j">Journal of Neurophysiology</title>
<idno type="ISSN">0022-3077</idno>
<idno type="eISSN">1522-1598</idno>
<imprint><date when="2014">2014</date>
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<front><div type="abstract" xml:lang="en"><p>Rats use rhythmic whisker movements, called <italic>active whisking</italic>
, to sense the environment, which include whisker protractions followed by retractions at various frequencies. Using a proxy of active whisking in anesthetized rats, called <italic>artificial</italic>
whisking, which is induced by electrically stimulating the facial motor nerve, we characterized the neural responses evoked in the barrel cortex by whisking in air (without contact) and on a surface (with contact). Neural responses were compared between distinct network states consisting of cortical deactivation (synchronized slow oscillations) and activation (desynchronized state) produced by neuromodulation (cholinergic or noradrenergic stimulation in neocortex or thalamus). Here we show that population responses in the barrel cortex consist of a robust signal driven by the onset of the whisker protraction followed by a whisking retraction signal that emerges during low frequency whisking on a surface. The whisking movement onset signal is suppressed by increasing whisking frequency, is controlled by cortical synaptic inhibition, is suppressed during cortical activation states, is little affected by whisking on a surface, and is ubiquitous in ventroposterior medial (VPM) thalamus, barrel cortex, and superior colliculus. The whisking retraction signal codes the duration of the preceding whisker protraction, is present in thalamocortical networks but not in superior colliculus, and is robust during cortical activation; a state associated with natural exploratory whisking. The expression of different whisking signals in forebrain and midbrain may define the sensory processing abilities of those sensorimotor circuits. Whisking related signals in the barrel cortex are controlled by network states that are set by neuromodulators.</p>
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