Functional connectivity delineates distinct roles of the inferior frontal cortex and pre-supplementary motor area in stop signal inhibition
Identifieur interne : 001235 ( Ncbi/Merge ); précédent : 001234; suivant : 001236Functional connectivity delineates distinct roles of the inferior frontal cortex and pre-supplementary motor area in stop signal inhibition
Auteurs : Jeng-Ren Duann [États-Unis] ; Jaime S. Ide [États-Unis] ; Xi Luo [États-Unis] ; Chiang-Shan Ray Li [États-Unis]Source :
- The Journal of neuroscience : the official journal of the Society for Neuroscience [ 0270-6474 ] ; 2009.
Abstract
The neural basis of motor response inhibition has drawn considerable attention in recent imaging literature. Many studies have employed the go/no-go or stop signal task to examine the neural processes underlying motor response inhibition. In particular, showing greater activity during no-go (stop) as compared to go trials and during stop success as compared to stop error trials, the right inferior prefrontal cortex (IFC) has been suggested by numerous studies as the cortical area mediating response inhibition. Many of these same studies as well as others have also implicated the pre-supplementary motor area (preSMA) in this process, in accord with a function of the medial prefrontal cortex in goal-directed action. Here we employed connectivity analyses to delineate the roles of IFC and preSMA during stop signal inhibition. Specifically, we hypothesized that, as an integral part of the ventral attention system, the IFC responds to a stop signal and expedites the stop process in the preSMA, the primary site of motor response inhibition. This hypothesis predicted that preSMA and primary motor cortex would show functional interconnectivity via the basal ganglia circuitry to mediate response execution or inhibition, whereas the IFC would influence the basal ganglia circuitry via connectivity with preSMA. The results of Granger causality analyses in 57 participants confirmed this hypothesis. Furthermore, psychophysiological interaction showed that, as compared to stop errors, stop successes evoked greater effective connectivity between the IFC and preSMA, providing additional support for this hypothesis. These new findings provided evidence critically differentiating the roles of IFC and preSMA during stop signal inhibition and have important implications for our understanding of the component processes of inhibitory control.
Url:
DOI: 10.1523/JNEUROSCI.1300-09.2009
PubMed: 19675251
PubMed Central: 2769086
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<front><div type="abstract" xml:lang="en"><p id="P1">The neural basis of motor response inhibition has drawn considerable attention in recent imaging literature. Many studies have employed the go/no-go or stop signal task to examine the neural processes underlying motor response inhibition. In particular, showing greater activity during no-go (stop) as compared to go trials and during stop success as compared to stop error trials, the right inferior prefrontal cortex (IFC) has been suggested by numerous studies as the cortical area mediating response inhibition. Many of these same studies as well as others have also implicated the pre-supplementary motor area (preSMA) in this process, in accord with a function of the medial prefrontal cortex in goal-directed action. Here we employed connectivity analyses to delineate the roles of IFC and preSMA during stop signal inhibition. Specifically, we hypothesized that, as an integral part of the ventral attention system, the IFC responds to a stop signal and expedites the stop process in the preSMA, the primary site of motor response inhibition. This hypothesis predicted that preSMA and primary motor cortex would show functional interconnectivity via the basal ganglia circuitry to mediate response execution or inhibition, whereas the IFC would influence the basal ganglia circuitry via connectivity with preSMA. The results of Granger causality analyses in 57 participants confirmed this hypothesis. Furthermore, psychophysiological interaction showed that, as compared to stop errors, stop successes evoked greater effective connectivity between the IFC and preSMA, providing additional support for this hypothesis. These new findings provided evidence critically differentiating the roles of IFC and preSMA during stop signal inhibition and have important implications for our understanding of the component processes of inhibitory control.</p>
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<given-names>Chiang-shan Ray</given-names>
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<xref ref-type="aff" rid="A5">5</xref>
<xref ref-type="corresp" rid="CR1">*</xref>
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Swartz Center for Computational Neuroscience, Institute of Neural Computation, University of California, San Diego, CA 92093</aff>
<aff id="A2"><label>2</label>
Department of Psychiatry, Yale University, New Haven, CT 06519</aff>
<aff id="A3"><label>3</label>
Department of Statistics, Yale University, New Haven, CT 06519</aff>
<aff id="A4"><label>4</label>
Department of Neurobiology, Yale University, New Haven, CT 06519</aff>
<aff id="A5"><label>5</label>
Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06519</aff>
<author-notes><corresp id="CR1"><label>*</label>
Address correspondence to: Dr. Chiang-shan Ray Li Connecticut Mental Health Center, S103 Department of Psychiatry, Yale University School of Medicine 34 Park Street New Haven, CT 06519 Phone: 203-974-7354 FAX: 203-974-7076 <email>chiang-shan.li@yale.edu</email>
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<abstract><p id="P1">The neural basis of motor response inhibition has drawn considerable attention in recent imaging literature. Many studies have employed the go/no-go or stop signal task to examine the neural processes underlying motor response inhibition. In particular, showing greater activity during no-go (stop) as compared to go trials and during stop success as compared to stop error trials, the right inferior prefrontal cortex (IFC) has been suggested by numerous studies as the cortical area mediating response inhibition. Many of these same studies as well as others have also implicated the pre-supplementary motor area (preSMA) in this process, in accord with a function of the medial prefrontal cortex in goal-directed action. Here we employed connectivity analyses to delineate the roles of IFC and preSMA during stop signal inhibition. Specifically, we hypothesized that, as an integral part of the ventral attention system, the IFC responds to a stop signal and expedites the stop process in the preSMA, the primary site of motor response inhibition. This hypothesis predicted that preSMA and primary motor cortex would show functional interconnectivity via the basal ganglia circuitry to mediate response execution or inhibition, whereas the IFC would influence the basal ganglia circuitry via connectivity with preSMA. The results of Granger causality analyses in 57 participants confirmed this hypothesis. Furthermore, psychophysiological interaction showed that, as compared to stop errors, stop successes evoked greater effective connectivity between the IFC and preSMA, providing additional support for this hypothesis. These new findings provided evidence critically differentiating the roles of IFC and preSMA during stop signal inhibition and have important implications for our understanding of the component processes of inhibitory control.</p>
</abstract>
<kwd-group><kwd>ventral attention system</kwd>
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<kwd>no-go</kwd>
<kwd>neuroimaging</kwd>
<kwd>inhibitory control</kwd>
<kwd>prefrontal</kwd>
<kwd>PPI</kwd>
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<contract-num rid="DA1">R01 DA023248-02</contract-num>
<contract-sponsor id="DA1">National Institute on Drug Abuse : NIDA</contract-sponsor>
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</front>
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<name sortKey="Luo, Xi" sort="Luo, Xi" uniqKey="Luo X" first="Xi" last="Luo">Xi Luo</name>
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