Stefan Ursu

Summary

Affiliation: University of California
Country: USA

Publications

  1. pmc An initial investigation of the orbitofrontal cortex hyperactivity in obsessive-compulsive disorder: exaggerated representations of anticipated aversive events?
    Stefan Ursu
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
    Neuropsychologia 47:2145-8. 2009
  2. pmc Conflict-related activity in the caudal anterior cingulate cortex in the absence of awareness
    Stefan Ursu
    Department of Psychiatry, University of California, Davis, Sacramento, CA 95817, USA
    Biol Psychol 80:279-86. 2009
  3. ncbi request reprint Outcome representations, counterfactual comparisons and the human orbitofrontal cortex: implications for neuroimaging studies of decision-making
    Stefan Ursu
    Department of Psychiatry, University of California, Davis, CA 95616, USA
    Brain Res Cogn Brain Res 23:51-60. 2005
  4. pmc Distinguishing expected negative outcomes from preparatory control in the human orbitofrontal cortex
    Stefan Ursu
    Department of Psychiatry, University of California Davis, Sacramento, CA 95817, USA
    Brain Res 1227:110-9. 2008
  5. pmc Multivariate pattern analysis of functional magnetic resonance imaging data reveals deficits in distributed representations in schizophrenia
    Jong H Yoon
    Department of Psychiatry and Imaging Research Center, University of California Davis, Sacramento, California 95817, USA
    Biol Psychiatry 64:1035-41. 2008
  6. doi request reprint Prefrontal cortical deficits and impaired cognition-emotion interactions in schizophrenia
    Stefan Ursu
    Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, Davis, Sacramento, CA 95817, USA
    Am J Psychiatry 168:276-85. 2011
  7. pmc Behavioral regulation in methamphetamine abusers: an fMRI study
    Ruth Salo
    Deparment of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
    Psychiatry Res 211:234-8. 2013
  8. pmc Diminished orientation-specific surround suppression of visual processing in schizophrenia
    Jong H Yoon
    Department of Psychiatry and Imaging Research Center, University of California Davis, 4701 X Street, Sacramento, CA 95817, USA
    Schizophr Bull 35:1078-84. 2009
  9. pmc The neural substrates of cognitive control deficits in autism spectrum disorders
    Marjorie Solomon
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, CA 95817, USA
    Neuropsychologia 47:2515-26. 2009
  10. doi request reprint Modafinil shifts human locus coeruleus to low-tonic, high-phasic activity during functional MRI
    Michael J Minzenberg
    Department of Psychiatry, University of California, Davis School of Medicine, Sacramento, CA, USA
    Science 322:1700-2. 2008

Detail Information

Publications15

  1. pmc An initial investigation of the orbitofrontal cortex hyperactivity in obsessive-compulsive disorder: exaggerated representations of anticipated aversive events?
    Stefan Ursu
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
    Neuropsychologia 47:2145-8. 2009
    ..The level of OFC hyperactivity correlated directly with the severity of anxiety symptoms. These results support the hypothesis that OCD is characterized by exaggerated OFC representations of anticipated aversive events...
  2. pmc Conflict-related activity in the caudal anterior cingulate cortex in the absence of awareness
    Stefan Ursu
    Department of Psychiatry, University of California, Davis, Sacramento, CA 95817, USA
    Biol Psychol 80:279-86. 2009
    ..These results suggest that the performance monitoring function of the cACC extends beyond detection of errors made with or without awareness, and involves detection of multiple responses even when they are outside of awareness...
  3. ncbi request reprint Outcome representations, counterfactual comparisons and the human orbitofrontal cortex: implications for neuroimaging studies of decision-making
    Stefan Ursu
    Department of Psychiatry, University of California, Davis, CA 95616, USA
    Brain Res Cogn Brain Res 23:51-60. 2005
    ..We also discuss some of the implications that these hypotheses have for neuroimaging studies of reward processing and decision-making, and for studies of neuropsychiatric disorders in which these processes are thought to be disturbed...
  4. pmc Distinguishing expected negative outcomes from preparatory control in the human orbitofrontal cortex
    Stefan Ursu
    Department of Psychiatry, University of California Davis, Sacramento, CA 95817, USA
    Brain Res 1227:110-9. 2008
    ..Furthermore, they provide additional converging evidence that the lateral OFC is involved in representing specifically the affective impact of anticipated negative outcomes...
  5. pmc Multivariate pattern analysis of functional magnetic resonance imaging data reveals deficits in distributed representations in schizophrenia
    Jong H Yoon
    Department of Psychiatry and Imaging Research Center, University of California Davis, Sacramento, California 95817, USA
    Biol Psychiatry 64:1035-41. 2008
    ..We applied this method to test the hypothesis of the impairment in distributed representations in schizophrenia. We also compared the results of this method with traditional general linear model (GLM)-based univariate analysis...
  6. doi request reprint Prefrontal cortical deficits and impaired cognition-emotion interactions in schizophrenia
    Stefan Ursu
    Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, Davis, Sacramento, CA 95817, USA
    Am J Psychiatry 168:276-85. 2011
    ....
  7. pmc Behavioral regulation in methamphetamine abusers: an fMRI study
    Ruth Salo
    Deparment of Psychiatry and Behavioral Sciences, University of California, Davis, CA, USA
    Psychiatry Res 211:234-8. 2013
    ..Interestingly, these impairments do not appear to be linked to drug use patterns or to educational levels...
  8. pmc Diminished orientation-specific surround suppression of visual processing in schizophrenia
    Jong H Yoon
    Department of Psychiatry and Imaging Research Center, University of California Davis, 4701 X Street, Sacramento, CA 95817, USA
    Schizophr Bull 35:1078-84. 2009
    ..In conjunction with physiological and anatomical evidence from basic and postmortem studies, our results suggest a deficit of inhibition in primary visual cortex in schizophrenia...
  9. pmc The neural substrates of cognitive control deficits in autism spectrum disorders
    Marjorie Solomon
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, CA 95817, USA
    Neuropsychologia 47:2515-26. 2009
    ..In the autism group, reduced fronto-parietal connectivity was related to attention deficit hyperactivity disorder symptoms...
  10. doi request reprint Modafinil shifts human locus coeruleus to low-tonic, high-phasic activity during functional MRI
    Michael J Minzenberg
    Department of Psychiatry, University of California, Davis School of Medicine, Sacramento, CA, USA
    Science 322:1700-2. 2008
    ..These results confirm in humans the role of the LC-NE system in PFC function and cognitive control and suggest a mechanism for therapeutic action of procognitive noradrenergic agents...
  11. pmc Impaired prefrontal cortical function and disrupted adaptive cognitive control in methamphetamine abusers: a functional magnetic resonance imaging study
    Ruth Salo
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, USA
    Biol Psychiatry 65:706-9. 2009
    ..Deficits in behavioral control are thought to be one contributing factor to the sustainment of addictive behaviors in MA abuse...
  12. pmc Predictors of methamphetamine psychosis: history of ADHD-relevant childhood behaviors and drug exposure
    Ruth Salo
    Department of Psychiatry and Behavioral Sciences, University of California, Davis, 2230 Stockton Blvd, Sacramento, CA 95817, USA Imaging Research Center, University of California, Davis, 4701 X Street, Sacramento, CA 95817, USA Electronic address
    Psychiatry Res 210:529-35. 2013
    ..These results may elucidate factors that contribute to the psychiatric sequelae of MA abuse...
  13. doi request reprint Association of dorsolateral prefrontal cortex dysfunction with disrupted coordinated brain activity in schizophrenia: relationship with impaired cognition, behavioral disorganization, and global function
    Jong H Yoon
    Department of Psychiatry and Imaging Research Center, University of California, Davis, Sacramento, Calif 95817, USA
    Am J Psychiatry 165:1006-14. 2008
    ....
  14. ncbi request reprint Specificity of prefrontal dysfunction and context processing deficits to schizophrenia in never-medicated patients with first-episode psychosis
    Angus W MacDonald
    Department of Psychology, University of Minnesota, N219 Elliott Hall, 75 E River Rd, Minneapolis, MN 55455, USA
    Am J Psychiatry 162:475-84. 2005
    ....
  15. ncbi request reprint Overactive action monitoring in obsessive-compulsive disorder: evidence from functional magnetic resonance imaging
    Stefan Ursu
    Department of Neuroscience, University of Pittsburgh, USA
    Psychol Sci 14:347-53. 2003
    ..These findings suggest that as part of an overactive action-monitoring system, the ACC is more directly involved in the pathophysiology of OCD than previously thought...