2011
Diffusion Tensor Imaging in Autism Spectrum Disorders: Preliminary Evidence of Abnormal Neural Connectivity
Jou RJ, Jackowski AP, Papademetris X, Rajeevan N, Staib LH, Volkmar FR. Diffusion Tensor Imaging in Autism Spectrum Disorders: Preliminary Evidence of Abnormal Neural Connectivity. Australian & New Zealand Journal Of Psychiatry 2011, 45: 153-162. PMID: 21128874, PMCID: PMC3123660, DOI: 10.3109/00048674.2010.534069.Peer-Reviewed Original Research
2009
Variation in orbitofrontal cortex volume: relation to sex, emotion regulation and affect
Welborn BL, Papademetris X, Reis DL, Rajeevan N, Bloise SM, Gray JR. Variation in orbitofrontal cortex volume: relation to sex, emotion regulation and affect. Social Cognitive And Affective Neuroscience 2009, 4: 328-339. PMID: 20019072, PMCID: PMC2799952, DOI: 10.1093/scan/nsp028.Peer-Reviewed Original ResearchConceptsAffective individual differencesEmotion regulationIndividual differencesSelf-reported emotion regulation strategiesVmPFC volumeSex differencesEmotion regulation strategiesOrbitofrontal Cortex SubregionsHealthy right-handed adultsVentromedial prefrontal cortexBrain structuresRight-handed adultsEmotion suppressionPositive emotionsBrain volumeRegulation strategiesSomatic anxietyEmotional impulsesOrbitofrontal cortex structurePrefrontal cortexPlanum temporaleLateral orbitofrontalRight lateral orbitofrontalCortex volumeCortex structureFunctional connectivity and alterations in baseline brain state in humans
Martuzzi R, Ramani R, Qiu M, Rajeevan N, Constable RT. Functional connectivity and alterations in baseline brain state in humans. NeuroImage 2009, 49: 823-834. PMID: 19631277, PMCID: PMC2764802, DOI: 10.1016/j.neuroimage.2009.07.028.Peer-Reviewed Original ResearchConceptsDefault mode networkMAC sevoflurane anesthesiaBaseline brain activityFunctional connectivity fMRISevoflurane anesthesiaHigher-order brain regionsAnesthetized conditionSensory cortexDifferent brain networksBaseline activityBrain regionsHuman volunteersSensory areasFunctional connectivityAnesthesiaMode networkLow-level sensory areasBrain networksBrain activityCognitive regionsBrain propertiesBrain statesFurther evidencePainThalamus
2008
Anesthetic effects on regional CBF, BOLD, and the coupling between task‐induced changes in CBF and BOLD: An fMRI study in normal human subjects
Qiu M, Ramani R, Swetye M, Rajeevan N, Constable RT. Anesthetic effects on regional CBF, BOLD, and the coupling between task‐induced changes in CBF and BOLD: An fMRI study in normal human subjects. Magnetic Resonance In Medicine 2008, 60: 987-996. PMID: 18816821, PMCID: PMC2716171, DOI: 10.1002/mrm.21759.Peer-Reviewed Original ResearchConceptsCerebral blood flowLow-dose sevofluraneRegional cerebral blood flowTask-induced changesBaseline cerebral blood flowBlood oxygen level-dependent (BOLD) signalAbsence of anesthesiaHealthy human subjectsHuman subjectsNormal human subjectsLevel-dependent signalFunctional MR imagingVascular measuresAnesthetic agentsBlood flowAnesthetic effectSevofluraneFunctional MRI dataAnesthesia conditionsAnesthesiaMR imagingAuditory regionsOxidative metabolismAuditory stimuliFMRI studySensory and cognitive mechanisms of change detection in the context of speech
Laufer I, Negishi M, Rajeevan N, Lacadie CM, Constable RT. Sensory and cognitive mechanisms of change detection in the context of speech. Brain Structure And Function 2008, 212: 427-442. PMID: 18193453, PMCID: PMC2248604, DOI: 10.1007/s00429-007-0167-8.Peer-Reviewed Original Research
1999
[123I]Iomazenil SPECT benzodiazepine receptor imaging in schizophrenia
Verhoeff N, Soares J, D’Souza C, Gil R, Degen K, Abi-Dargham A, Zoghbi S, Fujita M, Rajeevan N, Seibyl J, Krystal J, van Dyck C, Charney D, Innis R. [123I]Iomazenil SPECT benzodiazepine receptor imaging in schizophrenia. Psychiatry Research 1999, 91: 163-173. PMID: 10641580, DOI: 10.1016/s0925-4927(99)00027-x.Peer-Reviewed Original ResearchConceptsDuration of illnessHealthy control subjectsControl subjectsGamma-aminobutyric acidLeft precentral gyrusSuperior occipital gyrusPANSS scoresPrecentral gyrusOccipital gyrusSignificant differencesTotal brain uptakeNon-smoking patientsGray matter atrophyConstant infusion paradigmPathophysiology of schizophreniaCortical brain regionsSingle photon emissionTypical antipsychoticsAtypical antipsychoticsCigarette smokingInhibitory neurotransmissionBrain uptakeInfusion paradigmMatter atrophyPostmortem studies