Layer 4 Gates Plasticity in Visual Cortex Independent of a Canonical Microcircuit.
Layer 4 Gates Plasticity in Visual Cortex Independent of a Canonical Microcircuit.
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DOI:
10.1016/j.cub.2020.05.067
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发表时间:
2020-08-03
期刊:
影响因子:
--
通讯作者:
McGee AW
中科院分区:
文献类型:
--
作者:
Frantz MG;Crouse EC;Sokhadze G;Ikrar T;Stephany CÉ;Nguyen C;Xu X;McGee AW
Disrupting binocular vision during a developmental critical period can yield enduring changes to ocular dominance (OD) in primary visual cortex (V1). Here we investigated how this experience-dependent plasticity is coordinated within the laminar circuitry of V1 by deleting separately in each cortical layer (L) a gene required to close the critical period, nogo-66 receptor (ngr1). Deleting ngr1 in excitatory neurons in L4, but not in L2/3, L5, or L6, prevented closure of the critical period and adult mice remained sensitive to brief monocular deprivation. Intracortical disinhibition but not thalamocortical disinhibition accompanied this OD plasticity. Both juvenile wild-type mice and adult mice lacking ngr1 in L4 displayed OD plasticity that advanced more rapidly L4 than L2/3 or L5. Interestingly, blocking OD plasticity in L2/3 with the drug AM-251 did not impair OD plasticity in L5. We propose that L4 restricts disinhibition and gates OD plasticity independent of a canonical cortical microcircuit. Frantz et al. explore the regulation and propagation of experience-dependent plasticity within the laminar circuitry of visual cortex. Layer 4 limits intracortical disinhibition to close the critical period for OD plasticity throughout visual cortex. OD plasticity does not follow a canonical cortical microcircuit.
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影响因子:
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作者:
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