2013
The role of top-down control in different phases of a sensorimotor timing task: a DCM study of adults and adolescents
Witt ST, Stevens MC. The role of top-down control in different phases of a sensorimotor timing task: a DCM study of adults and adolescents. Brain Imaging And Behavior 2013, 7: 260-273. PMID: 23475755, PMCID: PMC3743949, DOI: 10.1007/s11682-013-9224-5.Peer-Reviewed Original ResearchConceptsPrefrontal cortexLow-level sensorySignificant maturational effectsVentrolateral prefrontal cortexDynamic causal modelingInternal clock mechanismFinger-tapping taskCognitive controlSensorimotor timingBehavioral accuracyAuditory cuesTiming taskFMRI studyBaseline connectivitySensory regionsCognitive functionDCM studySensory stimuliCausal modelingAuditory cortexMotor regionsCuesBrain regionsAccurate performanceMotor control
2005
Abnormal hemodynamics in schizophrenia during an auditory oddball task
Kiehl KA, Stevens MC, Celone K, Kurtz M, Krystal JH. Abnormal hemodynamics in schizophrenia during an auditory oddball task. Biological Psychiatry 2005, 57: 1029-1040. PMID: 15860344, PMCID: PMC2771438, DOI: 10.1016/j.biopsych.2005.01.035.Peer-Reviewed Original ResearchConceptsAuditory oddball taskHealthy participantsOddball taskThree-stimulus auditory oddball taskDiffuse brain abnormalitiesHealthy control subjectsNovelty processingWidespread pathologic processCerebral areasControl subjectsBrain abnormalitiesMagnetic resonance imaging dataAbnormal hemodynamicsPathologic processesSchizophrenia patientsParietal cortexCognitive functionHeterogeneous disorderCerebellar circuitsSchizophreniaAbnormalitiesSignificant activationSubcortical systemsFunctional magnetic resonance imaging (fMRI) dataPatients
2004
The Effect of Short‐Term Estradiol Therapy on Cognitive Function in Older Men Receiving Hormonal Suppression Therapy for Prostate Cancer
Taxel P, Stevens MC, Trahiotis M, Zimmerman J, Kaplan RF. The Effect of Short‐Term Estradiol Therapy on Cognitive Function in Older Men Receiving Hormonal Suppression Therapy for Prostate Cancer. Journal Of The American Geriatrics Society 2004, 52: 269-273. PMID: 14728639, DOI: 10.1111/j.1532-5415.2004.52067.x.Peer-Reviewed Original ResearchConceptsProstate cancerOlder menCognitive functionShort-term estradiol therapyGeneral Clinical Research CenterCognitive deficitsSex hormone-binding globulinE replacement therapyHormonal suppression therapyClinical Research CenterCommunity-dwelling menSelf-reported cognitive deficitsHormone-binding globulinEffects of estrogenSymptoms of depressionSignificant differencesStandardized neurocognitive testsEstradiol therapyHypogonadal menPostmenopausal womenSuppression therapyReplacement therapyBone turnoverHormone levelsDepressive symptoms