Dissecting the neural circuitry for spatial working memory
Dissecting the neural circuitry for spatial working memory
批准号:
9116297
负责人:
Ilana Witten
金额:
$39.79万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2015
资助国家:
美国
项目状态:
已结题
起止时间:
2015-07-22 至 2020-03-31
关键词:
AffectAnimalsAreaBasic ScienceBehaviorBrainCellsCharacteristicsCorpus striatum structureCustomDopamineDorsalElectrophysiology (science)EventFire - disastersFluorescenceGeneticGoalsHealthHeartHourInterventionKnowledgeLocationMaintenanceMediatingMemory impairmentMental disordersModelingMonitorNeuromodulatorNeuronsNeurosciencesPatternPerformancePharmaceutical PreparationsPhasePopulationPrefrontal CortexPrevalenceRattusRewardsRoleSchizophreniaShort-Term MemorySignal TransductionSystemTimeUpdateWorkbasecell typecholinergic neuroncognitive functiondopaminergic neuroneffective therapyin vivoinsightneural circuitneural correlateneuromechanismnew technologyoptogeneticsrelating to nervous systemresponsetemporal measurementtransmission process
中文摘要
英文摘要
DESCRIPTION (provided by applicant): Working memory is an essential cognitive function central to virtually all behaviors. Despite the fact that we know which brain areas and which neuromodulators are involved in working memory, we know very little about which neurons need to be activated when to enable working memory. This gap in our knowledge arose because of the technical difficulty in manipulating and monitoring neural activity in genetically- and anatomically- defined cell-types with sufficiently high temporal resolution. In order to overcome this challenge and elucidate some of the causal neural dynamics for working memory, we propose to combine multiple synergistic approaches, including a rat optogenetic model that we have previously developed to target dopaminergic neurons, in vivo electrophysiological recordings, and fluorescence-based monitoring of neural activity in freely behaving animals (with gCaMP6). In Aim 1, we will optogenetically inhibit several cortical and striatal circuits eiter during the updating, maintenance, or readout of working memory to determine which aspect of working memory each circuit supports. In Aims 2, we will monitor neural activity in dopaminergic neurons using gCaMP6 to determine how dopaminergic dynamics correlate with working memory performance. In Aim 3, we will generate different patterns of dopaminergic stimulation (e.g. tonic vs phasic) to determine the causal relationship between working memory performance and dopaminergic activity dynamics. In Aim 4, we will integrate dopaminergic stimulation with electrophysiological recordings in dorsal striatum and prelimbic cortex to isolate
the downstream changes in neural activity mediated by dopaminergic activity. Together, this work will provide new insights into the neural circuit mechanisms underlying working memory, with implications for both basic science and an understanding of the working memory dysfunction in various psychiatric disorders.
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会议论文
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