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
2006
Hippocampus Function Predicts Severity of Post-Traumatic Stress Disorder
Astur RS, St. Germain SA, Tolin D, Ford J, Russell D, Stevens M. Hippocampus Function Predicts Severity of Post-Traumatic Stress Disorder. Cyberpsychology Behavior And Social Networking 2006, 9: 234-240. PMID: 16640486, DOI: 10.1089/cpb.2006.9.234.Peer-Reviewed Original ResearchConceptsPost-traumatic stress disorderVirtual Morris water taskFunctional magnetic resonance imagingMorris water taskPTSD severityStress disorderHippocampal activityWater taskSevere PTSD symptomsHippocampal-dependent tasksPTSD symptomsTask performanceMemory problemsHippocampal functionBrain structuresTaskAbnormal brain structureHippocampus functionAge-matched controlsMagnetic resonance imagingIQDisordersHippocampusTraumaResonance imaging
2004
fMRI analysis with the general linear model: removal of latency-induced amplitude bias by incorporation of hemodynamic derivative terms
Calhoun VD, Stevens MC, Pearlson GD, Kiehl KA. fMRI analysis with the general linear model: removal of latency-induced amplitude bias by incorporation of hemodynamic derivative terms. NeuroImage 2004, 22: 252-257. PMID: 15110015, DOI: 10.1016/j.neuroimage.2003.12.029.Peer-Reviewed Original Research