2024
Inducing representational change in the hippocampus through real-time neurofeedback
Peng K, Wammes J, Nguyen A, Iordan C, Norman K, Turk-Browne N. Inducing representational change in the hippocampus through real-time neurofeedback. Philosophical Transactions Of The Royal Society B Biological Sciences 2024, 379: 20230091. PMID: 39428880, PMCID: PMC11491844, DOI: 10.1098/rstb.2023.0091.Peer-Reviewed Original ResearchMeSH KeywordsAdultFemaleHippocampusHumansMagnetic Resonance ImagingMaleMemoryNeurofeedbackVisual CortexYoung AdultConceptsFunctional magnetic resonance imagingReal-time functional magnetic resonance imagingPatterns of fMRI activityCategorical perception taskReal-time neurofeedbackNeurocognitive mechanismsFMRI sessionStimulus similarityFMRI activationTask demandsBehavioral consequencesUntrained objectsNeural representationPerception taskMemory integrationRepresentational changeEndogenous neuromodulatorNeurofeedbackHippocampusCortical representationIncreased coactivationMagnetic resonance imagingVisual cortexMemoryMultiple theories
2023
Hippocampal Mechanisms Support Cortisol-Induced Memory Enhancements
Sherman B, Harris B, Turk-Browne N, Sinha R, Goldfarb E. Hippocampal Mechanisms Support Cortisol-Induced Memory Enhancements. Journal Of Neuroscience 2023, 43: 7198-7212. PMID: 37813570, PMCID: PMC10601369, DOI: 10.1523/jneurosci.0916-23.2023.Peer-Reviewed Original ResearchMeSH KeywordsBrainEmotionsFemaleHippocampusHumansHydrocortisoneMagnetic Resonance ImagingMaleMemory, EpisodicConceptsFunctional magnetic resonance imagingMemory enhancementEpisodic memoryAssociative memoryEpisodic memory encodingBrain regionsHigh-resolution functional magnetic resonance imagingHuman hippocampusHigh-resolution fMRIStress-related hormone cortisolHormone cortisolMemory benefitsEmotional memoryMemory encodingEmotional eventsEmotional associationsHippocampal representationsHippocampal signaturesFunctional neuroimagingHippocampal mechanismsStressful eventsFunctional connectivityHippocampal functionMemory formationSalient informationAutomated and manual segmentation of the hippocampus in human infants
Fel J, Ellis C, Turk-Browne N. Automated and manual segmentation of the hippocampus in human infants. Developmental Cognitive Neuroscience 2023, 60: 101203. PMID: 36791555, PMCID: PMC9957787, DOI: 10.1016/j.dcn.2023.101203.Peer-Reviewed Original ResearchConceptsManual segmentationHippocampal segmentationInter-rater reliabilityAutomated SegmentationSegmentation methodSegmentationAnatomical MRI scansEarly hippocampal developmentHead motionFreeSurfer softwareSoftwareHippocampal developmentMRI scansHippocampal structureAwake infantsInfantsHippocampusFMRI protocolAnatomical scansGold standardAdult templateHuman infantsScan qualityScansProtocol
2022
Increasing stimulus similarity drives nonmonotonic representational change in hippocampus
Wammes J, Norman KA, Turk-Browne N. Increasing stimulus similarity drives nonmonotonic representational change in hippocampus. ELife 2022, 11: e68344. PMID: 34989336, PMCID: PMC8735866, DOI: 10.7554/elife.68344.Peer-Reviewed Original ResearchConceptsRepresentational changeHigh-level visual regionsShaped functionPairs of stimuliHigh-resolution fMRIStimulus similarityVisual regionsHuman participantsHippocampal learningMemoryPlasticity hypothesisCoactivationFMRIHippocampusGyrusStimuliWide enough rangeContradictory resultsParticipantsImage similarityLearningHypothesisU-shapeSimilar imagesEnough range
2021
Evidence of hippocampal learning in human infants
Ellis CT, Skalaban LJ, Yates TS, Bejjanki VR, Córdova NI, Turk-Browne NB. Evidence of hippocampal learning in human infants. Current Biology 2021, 31: 3358-3364.e4. PMID: 34022155, DOI: 10.1016/j.cub.2021.04.072.Peer-Reviewed Original ResearchMeSH KeywordsGeneralization, PsychologicalHippocampusHumansInfantLearningMagnetic Resonance ImagingMemory, EpisodicConceptsStatistical learningHuman infantsTask-based fMRIMedial prefrontal cortexHuman memoryVisual sequencesDurable memoriesMemory capacityMemory integrationAnterior hippocampusHippocampal activityPrefrontal cortexVital abilityTemporal orderHippocampal learningEarly childhoodLearningMemoryMonosynaptic pathwayTrisynaptic pathwayHippocampusInfantsYounger agePosterior divisionFunctional activityLearning hierarchical sequence representations across human cortex and hippocampus
Henin S, Turk-Browne NB, Friedman D, Liu A, Dugan P, Flinker A, Doyle W, Devinsky O, Melloni L. Learning hierarchical sequence representations across human cortex and hippocampus. Science Advances 2021, 7: eabc4530. PMID: 33608265, PMCID: PMC7895424, DOI: 10.1126/sciadv.abc4530.Peer-Reviewed Original ResearchConceptsOrdinal positionTransitional probabilitiesBrain areasEarliest brain areasGradient of complexityVisual sequencesCortico-hippocampal circuitsNeural representationNeural trackingEarly processingBrain's abilityTemporal regularityStatistical learningAssociative regionsSensory inputLow-level featuresHuman cortexSequence representationParallel computational systemsMultiple levelsComputational systemsIntracranial electrodesCortexHippocampusProcessing
2020
Statistical prediction of the future impairs episodic encoding of the present
Sherman BE, Turk-Browne NB. Statistical prediction of the future impairs episodic encoding of the present. Proceedings Of The National Academy Of Sciences Of The United States Of America 2020, 117: 22760-22770. PMID: 32859755, PMCID: PMC7502714, DOI: 10.1073/pnas.2013291117.Peer-Reviewed Original ResearchConceptsFunction of memoryEpisodic encodingSource recallEpisodic memoryUpcoming itemsStatistical learningAdaptive purposeFuture experiencesMemoryCurrent itemPast experienceBrain imagingSpecific experiencesBehavioral testsIdiosyncratic propertiesItemsFuture situationsExperienceParticular momentHippocampusRecallEncodingSimilar situationLearningSituationFunctions of ventral visual cortex after bilateral medial temporal lobe damage
Kim JG, Gregory E, Landau B, McCloskey M, Turk-Browne NB, Kastner S. Functions of ventral visual cortex after bilateral medial temporal lobe damage. Progress In Neurobiology 2020, 191: 101819. PMID: 32380224, PMCID: PMC7368375, DOI: 10.1016/j.pneurobio.2020.101819.Peer-Reviewed Original ResearchConceptsMedial temporal lobePerceptual memoryVisual cortexBilateral medial temporal lobe damageMedial temporal lobe damageVentral visual cortexTemporal lobe damageVisual cortex relativeExtensive bilateral lesionsAmnesic patientsLong delayMTL structuresNovel stimuliAdaptation effectsStimuli elicitRapid learningVisual areasMemory systemSingle experienceCortex relativeVisual systemTemporal lobeHippocampal lossStimuliMemoryContent-based Dissociation of Hippocampal Involvement in Prediction
Kok P, Rait LI, Turk-Browne NB. Content-based Dissociation of Hippocampal Involvement in Prediction. Journal Of Cognitive Neuroscience 2020, 32: 527-545. PMID: 31820676, PMCID: PMC6996939, DOI: 10.1162/jocn_a_01509.Peer-Reviewed Original ResearchConceptsPredictive processingAbstract shapesDomain-general processesFemale human participantsComplexity of stimuliComplex visual objectsModality of stimuliTypes of stimuliHigh-resolution fMRIDomain-specific rolesAuditory cuesPartial cuesVisual objectsHippocampal involvementBrain activityHuman participantsDistinct representationsHippocampal responsesComputational roleHippocampal functionPrevious researchStimuliCuesUnexpected orientationSuch accounts
2019
The hippocampus as a visual area organized by space and time: A spatiotemporal similarity hypothesis
Turk-Browne NB. The hippocampus as a visual area organized by space and time: A spatiotemporal similarity hypothesis. Vision Research 2019, 165: 123-130. PMID: 31734633, PMCID: PMC6881556, DOI: 10.1016/j.visres.2019.10.007.Peer-Reviewed Original ResearchConceptsVision scienceMemory systemVisual systemVentral visual streamHippocampal memory systemRelational bindingEpisodic memoryVisual streamVisual expectationsHippocampal mechanismsPattern separationVisual areasStatistical learningSimilarity hypothesisVisual representationComputational functionsBrief primerHippocampusCertain aspectsMemoryHypothesisLearningUnique formCircuityScienceHippocampal-neocortical interactions sharpen over time for predictive actions
Hindy NC, Avery EW, Turk-Browne NB. Hippocampal-neocortical interactions sharpen over time for predictive actions. Nature Communications 2019, 10: 3989. PMID: 31488845, PMCID: PMC6728336, DOI: 10.1038/s41467-019-12016-9.Peer-Reviewed Original ResearchConceptsBackground connectivityAction-outcome associationsVisual cortexHigh-resolution fMRICo-occurring eventsHippocampal predictionsNeural patternsV1/V2Behavioral paradigmsAction informationPrediction changesIndiscriminate bindingGreater differentiationPredictive actionCortexHippocampusFMRIWeak associationReinstatementConnectivityAssociationParadigmOutcomesRetrievalActionFocusing on what matters: Modulation of the human hippocampus by relational attention
Córdova NI, Turk‐Browne N, Aly M. Focusing on what matters: Modulation of the human hippocampus by relational attention. Hippocampus 2019, 29: 1025-1037. PMID: 30779473, PMCID: PMC6699927, DOI: 10.1002/hipo.23082.Peer-Reviewed Original ResearchConceptsRelational processingOnline perceptionHippocampal episodic memoryMultivariate pattern analysisLong-term memoryStable hippocampal representationsEpisodic memoryUnivariate activityRelative spatial positionRobust deactivationRelational tasksTemporal tasksTemporal relationsRelational attentionHippocampal representationsItem taskItem processingRelational informationSpatial positionTemporal orderSpatiotemporal contextPattern similarityHuman hippocampusTaskRelational computations
2018
Associative Prediction of Visual Shape in the Hippocampus
Kok P, Turk-Browne NB. Associative Prediction of Visual Shape in the Hippocampus. Journal Of Neuroscience 2018, 38: 6888-6899. PMID: 29986875, PMCID: PMC6070666, DOI: 10.1523/jneurosci.0163-18.2018.Peer-Reviewed Original ResearchConceptsAssociative predictionAuditory cuesVisual shapesVisual cortexSensory systemsFemale human participantsHigh-resolution fMRI signalsAspects of cognitionCross-modal associationsHuman brainProcess of inferenceHippocampal predictionsPerceptual processingHuman participantsPrior expectationsVisual informationMemory systemNeural activitySensory cortexFMRI signalsCuesMemoryCorresponding objectsPerceptionCortex
2017
Flexible weighting of diverse inputs makes hippocampal function malleable
Aly M, Turk-Browne NB. Flexible weighting of diverse inputs makes hippocampal function malleable. Neuroscience Letters 2017, 680: 13-22. PMID: 28587901, PMCID: PMC5712489, DOI: 10.1016/j.neulet.2017.05.063.Peer-Reviewed Original ResearchConceptsHippocampal functionAspects of cognitionDiverse cognitive functionsDedicated memory systemGeneral neural mechanismHippocampal computationsHippocampal representationsNeural mechanismsBehavioral goalsCognitive functionFlexible weightingMemory systemAnatomical inputsCognitionRecent researchPerceptionClassic theoryHippocampal modulationHippocampusDiverse inputsAttentionMemoryMalleabilityBroader roleRepresentationNeural Differentiation of Incorrectly Predicted Memories
Kim G, Norman KA, Turk-Browne NB. Neural Differentiation of Incorrectly Predicted Memories. Journal Of Neuroscience 2017, 37: 2022-2031. PMID: 28115478, PMCID: PMC5338753, DOI: 10.1523/jneurosci.3272-16.2017.Peer-Reviewed Original ResearchConceptsNeural representationPrevious contextTarget memoryBOLD activity patternsGreater neural differentiationMemory representationsHuman fMRIMemory weakeningTrial fashionSubsequent restudySuch memoriesIndividual memoryNeural network simulationMemoryControl conditionFMRIComputational modelItemsPrediction strengthRestudyNeural connectionsPrediction errorMore differentiationParticular contextRepresentationComplementary learning systems within the hippocampus: a neural network modelling approach to reconciling episodic memory with statistical learning
Schapiro AC, Turk-Browne NB, Botvinick MM, Norman KA. Complementary learning systems within the hippocampus: a neural network modelling approach to reconciling episodic memory with statistical learning. Philosophical Transactions Of The Royal Society B Biological Sciences 2017, 372: 20160049. PMID: 27872368, PMCID: PMC5124075, DOI: 10.1098/rstb.2016.0049.Peer-Reviewed Original ResearchConceptsStatistical learningRapid learningComplementary learning systems theoryComplementary learning systemsSequence of itemsEpisodic memoryIndividual episodesCognitive scienceAssociative reactivationTemporal regularityApparent representationIndividual experiencesNeural network modelling approachNeural network modelLearningLearning systemAnatomical pathwaysHippocampusSystems theoryHippocampal projectionsRegion CA1MemoryNetwork modelMemorizationExperienceHippocampal Structure Predicts Statistical Learning and Associative Inference Abilities during Development
Schlichting ML, Guarino KF, Schapiro AC, Turk-Browne NB, Preston AR. Hippocampal Structure Predicts Statistical Learning and Associative Inference Abilities during Development. Journal Of Cognitive Neuroscience 2017, 29: 37-51. PMID: 27575916, PMCID: PMC5130612, DOI: 10.1162/jocn_a_01028.Peer-Reviewed Original ResearchConceptsAssociative structureStatistical learningEpisodic memory systemSuperior behavioral performanceHypothesized roleHippocampal long axisHippocampal headDissociable patternsIndividual differencesBehavioral performanceDevelopmental sampleInference abilityMemory systemInference tasksAge 6Hippocampal structureTaskHippocampal developmentHippocampal axisGeneralized codeLearningAge rangeAdulthoodAbilityChildhood
2016
Linking pattern completion in the hippocampus to predictive coding in visual cortex
Hindy NC, Ng FY, Turk-Browne NB. Linking pattern completion in the hippocampus to predictive coding in visual cortex. Nature Neuroscience 2016, 19: 665-667. PMID: 27065363, PMCID: PMC4948994, DOI: 10.1038/nn.4284.Peer-Reviewed Original Research
2015
Statistical learning of temporal community structure in the hippocampus
Schapiro AC, Turk-Browne N, Norman KA, Botvinick MM. Statistical learning of temporal community structure in the hippocampus. Hippocampus 2015, 26: 3-8. PMID: 26332666, PMCID: PMC4715493, DOI: 10.1002/hipo.22523.Peer-Reviewed Original Research
2014
The Necessity of the Medial Temporal Lobe for Statistical Learning
Schapiro AC, Gregory E, Landau B, McCloskey M, Turk-Browne NB. The Necessity of the Medial Temporal Lobe for Statistical Learning. Journal Of Cognitive Neuroscience 2014, 26: 1736-1747. PMID: 24456393, PMCID: PMC4264662, DOI: 10.1162/jocn_a_00578.Peer-Reviewed Original Research