2024
Lesions to the mediodorsal thalamus, but not orbitofrontal cortex, enhance volatility beliefs linked to paranoia
Suthaharan P, Thompson S, Rossi-Goldthorpe R, Rudebeck P, Walton M, Chakraborty S, Noonan M, Costa V, Murray E, Mathys C, Groman S, Mitchell A, Taylor J, Corlett P, Chang S. Lesions to the mediodorsal thalamus, but not orbitofrontal cortex, enhance volatility beliefs linked to paranoia. Cell Reports 2024, 43: 114355. PMID: 38870010, PMCID: PMC11231991, DOI: 10.1016/j.celrep.2024.114355.Peer-Reviewed Original ResearchOrbitofrontal cortexMediodorsal thalamusReward learning rateAssociated with paranoiaExcitotoxic lesionsBrain regionsUnoperated monkeysAction selectionAdaptive behaviorParanoiaBelief updatingMDmcMeaningful changeCortexThalamusBeliefsLearning rateRobust to variabilityCompare performanceRewardBehaviorBrainMonkeysAction policiesPerception
2020
Paranoia as a deficit in non-social belief updating
Reed EJ, Uddenberg S, Suthaharan P, Mathys C, Taylor JR, Groman SM, Corlett PR. Paranoia as a deficit in non-social belief updating. ELife 2020, 9: e56345. PMID: 32452769, PMCID: PMC7326495, DOI: 10.7554/elife.56345.Peer-Reviewed Original ResearchConceptsParanoid individualsSocial threatLearning differencesTask environmentLearning behaviorOnline participantsMethamphetamine exposureParanoiaBeliefsVolatile environmentMental illnessComputational modelingIndividualsElevated sensitivityDeficitsAnticipationParticipantsParadigmThreatMethamphetamineDifferencesFurther assessmentBehaviorHarm
2017
Explaining Delusions: Reducing Uncertainty Through Basic and Computational Neuroscience
Feeney EJ, Groman SM, Taylor JR, Corlett PR. Explaining Delusions: Reducing Uncertainty Through Basic and Computational Neuroscience. Schizophrenia Bulletin 2017, 43: 263-272. PMID: 28177090, PMCID: PMC5605246, DOI: 10.1093/schbul/sbw194.Peer-Reviewed Original ResearchConceptsAssociative learning theoryPersistence of delusionsAttentional allocationCognitive psychologySet of beliefsAnimal beliefsNew learningComputational neuroscienceLearning theoryHuman beliefsErroneous beliefsBelief characteristicsBrain functionConsensual realityClinical phenomenologyAnimal researchBeliefsDelusionsComputational modelPsychotic illnessPsychologyPharmacological treatmentNeuroscienceTeleological approachFuture state