Ragnar Nesvåg

Summary

Affiliation: University of Oslo
Country: Norway

Publications

  1. doi request reprint A 5-year follow-up study of brain cortical and subcortical abnormalities in a schizophrenia cohort
    Ragnar Nesvåg
    Department of Psychiatry, Diakonhjemmet Hospital, P O Box 85, Vinderen, N 0319 Oslo, Norway
    Schizophr Res 142:209-16. 2012
  2. doi request reprint The use of screening instruments for detecting alcohol and other drug use disorders in first-episode psychosis
    Ragnar Nesvåg
    Department of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway
    Psychiatry Res 177:228-34. 2010
  3. ncbi request reprint Serum concentrations of risperidone and 9-OH risperidone following intramuscular injection of long-acting risperidone compared with oral risperidone medication
    R Nesvåg
    Psychiatric Research, Djakonhjemmet Hospital, Oslo, Norway
    Acta Psychiatr Scand 114:21-6. 2006
  4. ncbi request reprint Effects of alcohol consumption and antipsychotic medication on brain morphology in schizophrenia
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway
    Schizophr Res 90:52-61. 2007
  5. ncbi request reprint Regional thinning of the cerebral cortex in schizophrenia: effects of diagnosis, age and antipsychotic medication
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, and Institute of Psychiatry, University of Oslo, Norway
    Schizophr Res 98:16-28. 2008
  6. doi request reprint The relationship between symptom severity and regional cortical and grey matter volumes in schizophrenia
    Ragnar Nesvåg
    Institute of Psychiatry, University of Oslo, P O Box 85 Vinderen, 0319 Oslo, Norway
    Prog Neuropsychopharmacol Biol Psychiatry 33:482-90. 2009
  7. doi request reprint Subcortical brain volumes relate to neurocognition in schizophrenia and bipolar disorder and healthy controls
    Cecilie B Hartberg
    Institute of Clinical Medicine, Psychiatry Section, University of Oslo, Norway
    Prog Neuropsychopharmacol Biol Psychiatry 35:1122-30. 2011
  8. doi request reprint Cortical volume, surface area, and thickness in schizophrenia and bipolar disorder
    Lars M Rimol
    Division of Mental Health and Addiction, Institute of Clinical Medicine, University of Oslo, Norway
    Biol Psychiatry 71:552-60. 2012
  9. doi request reprint Cortical thickness and subcortical volumes in schizophrenia and bipolar disorder
    Lars M Rimol
    Department of Psychiatry, section Vinderen, University of Oslo, Oslo, Norway
    Biol Psychiatry 68:41-50. 2010
  10. doi request reprint Grey and white matter proportional relationships in the cerebellar vermis altered in schizophrenia
    Glenn Lawyer
    Institute of Psychiatry, University of Oslo, Oslo, Norway
    Cerebellum 8:52-60. 2009

Detail Information

Publications22

  1. doi request reprint A 5-year follow-up study of brain cortical and subcortical abnormalities in a schizophrenia cohort
    Ragnar Nesvåg
    Department of Psychiatry, Diakonhjemmet Hospital, P O Box 85, Vinderen, N 0319 Oslo, Norway
    Schizophr Res 142:209-16. 2012
    ..Evidence for progression in more chronic phases of schizophrenia is less established...
  2. doi request reprint The use of screening instruments for detecting alcohol and other drug use disorders in first-episode psychosis
    Ragnar Nesvåg
    Department of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway
    Psychiatry Res 177:228-34. 2010
    ..The results of this study suggest that AUDIT and DUDIT are powerful screening instruments for detecting alcohol and other drug use disorders in patients with first-episode psychosis...
  3. ncbi request reprint Serum concentrations of risperidone and 9-OH risperidone following intramuscular injection of long-acting risperidone compared with oral risperidone medication
    R Nesvåg
    Psychiatric Research, Djakonhjemmet Hospital, Oslo, Norway
    Acta Psychiatr Scand 114:21-6. 2006
    ..To compare serum concentrations of risperidone, 9-hydroxy (OH) risperidone and risperidone plus 9-OH risperidone, as well as the 9-OH risperidone/risperidone ratio in patients receiving depot and oral risperidone...
  4. ncbi request reprint Effects of alcohol consumption and antipsychotic medication on brain morphology in schizophrenia
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway
    Schizophr Res 90:52-61. 2007
    ..This study demonstrates that alcohol consumption is an important factor for variation in WM volumes, and this effect should be taken into account in all studies evaluating brain volumes from MR images...
  5. ncbi request reprint Regional thinning of the cerebral cortex in schizophrenia: effects of diagnosis, age and antipsychotic medication
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, and Institute of Psychiatry, University of Oslo, Norway
    Schizophr Res 98:16-28. 2008
    ..The lack of significant influence from antipsychotic medication supports that regional cortical thinning is an inherent feature of the neurobiological disease process in schizophrenia...
  6. doi request reprint The relationship between symptom severity and regional cortical and grey matter volumes in schizophrenia
    Ragnar Nesvåg
    Institute of Psychiatry, University of Oslo, P O Box 85 Vinderen, 0319 Oslo, Norway
    Prog Neuropsychopharmacol Biol Psychiatry 33:482-90. 2009
    ..To investigate the relationship between symptom severity and cortical and grey matter volumes in schizophrenia...
  7. doi request reprint Subcortical brain volumes relate to neurocognition in schizophrenia and bipolar disorder and healthy controls
    Cecilie B Hartberg
    Institute of Clinical Medicine, Psychiatry Section, University of Oslo, Norway
    Prog Neuropsychopharmacol Biol Psychiatry 35:1122-30. 2011
    ..It is unknown whether relationships between subcortical volumes and neurocognitive performance are similar or different between schizophrenia and bipolar disorder...
  8. doi request reprint Cortical volume, surface area, and thickness in schizophrenia and bipolar disorder
    Lars M Rimol
    Division of Mental Health and Addiction, Institute of Clinical Medicine, University of Oslo, Norway
    Biol Psychiatry 71:552-60. 2012
    ....
  9. doi request reprint Cortical thickness and subcortical volumes in schizophrenia and bipolar disorder
    Lars M Rimol
    Department of Psychiatry, section Vinderen, University of Oslo, Oslo, Norway
    Biol Psychiatry 68:41-50. 2010
    ..The purpose of this study was to compare cortical thickness and subcortical volumes in schizophrenia and bipolar disorder, to assess differences and similarities in cortical and subcortical brain structure...
  10. doi request reprint Grey and white matter proportional relationships in the cerebellar vermis altered in schizophrenia
    Glenn Lawyer
    Institute of Psychiatry, University of Oslo, Oslo, Norway
    Cerebellum 8:52-60. 2009
    ..Tissue class volumes in the cerebellar vermis were strongly interrelated in controls. These relationships were disturbed in patients with schizophrenia...
  11. doi request reprint Apathy and functioning in first-episode psychosis
    Ann Faerden
    Department of Psychiatry, Ulleval University Hospital, Oslo, Norway
    Psychiatr Serv 60:1495-503. 2009
    ....
  12. doi request reprint Investigating possible subtypes of schizophrenia patients and controls based on brain cortical thickness
    Glenn Lawyer
    Institute of Psychiatry, University of Oslo, Oslo, Norway
    Psychiatry Res 164:254-64. 2008
    ..The study found no subtypes specific to patients. It suggested, however, that associations between abnormally thin cortex and schizophrenia are more widespread than shown by previously published results based on significance testing...
  13. doi request reprint Reduced brain cortical folding in schizophrenia revealed in two independent samples
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway
    Schizophr Res 152:333-8. 2014
    ..The finding of reduced degree of folding in large regions of the cerebral cortex across two independent samples indicates that reduced gyrification is an inherent feature of the brain pathology in schizophrenia...
  14. doi request reprint No effect of obstetric complications on basal ganglia volumes in schizophrenia
    Unn Kristin Haukvik
    Institute of Psychiatry, section Vinderen, University of Oslo, P O Box 85 Vinderen, N 0319 Oslo, Norway
    Prog Neuropsychopharmacol Biol Psychiatry 34:619-23. 2010
    ..This is the first study to explore if there is a relationship between OCs and basal ganglia volume in schizophrenia...
  15. ncbi request reprint Cerebellar volumes in men with schizophrenia and alcohol dependence
    Katarina Varnas
    Institute of Psychiatry, University of Oslo, Oslo, Norway
    Psychiatry Clin Neurosci 61:326-9. 2007
    ..The results provide indications for differential morphological abnormalities of the cerebellar vermis in patients with schizophrenia and alcohol dependence...
  16. doi request reprint One year follow-up of alcohol and illicit substance use in first-episode psychosis: does gender matter?
    Elisabeth Heffermehl Lange
    KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, Psychiatry Section, University of Oslo, Oslo, Norway Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway Electronic address
    Compr Psychiatry 55:274-82. 2014
    ..Female FEP patients who are also substance users may be particularly vulnerable in this regard and warrant closer attention. ..
  17. ncbi request reprint Therapeutic drug monitoring of patients on risperidone depot
    Ragnar Nesvåg
    Department of Psychiatric Research, Diakonhjemmet Hospital, Oslo, Norway
    Nord J Psychiatry 59:51-5. 2005
    ..There is, however, only a presumed relationship between serum drug level and antipsychotic efficacy for risperidone...
  18. doi request reprint Local and covariate-modulated false discovery rates applied in neuroimaging
    Glenn Lawyer
    Department of Psychiatry, University of Oslo, Oslo, Norway
    Neuroimage 47:213-9. 2009
    ..The increased statistical precision from more accurate models of the distribution of the test statistic demonstrates the potential of these methods for neuroimaging and suggests the possibility to test novel hypothesis...
  19. ncbi request reprint Assessing apathy: the use of the Apathy Evaluation Scale in first episode psychosis
    Ann Faerden
    Section for Psychosis Research, Division of Psychiatry, Building 49, Ulleval University Hospital, Krikeveien 166, 0407 Oslo, Norway
    Eur Psychiatry 23:33-9. 2008
    ..The main aims of this study were to examine the psychometric properties of the AES-C and its relationship to the Positive and Negative Syndrome Scale (PANSS)...
  20. doi request reprint Apathy in first episode psychosis patients: one year follow up
    Ann Faerden
    Oslo University Hospital, Ulleval, 0407 Oslo, Norway
    Schizophr Res 116:20-6. 2010
    ....
  21. doi request reprint Suicidality before and in the early phases of first episode psychosis
    Elizabeth A Barrett
    Department of Mental Health, Oslo University Hospital, 0514 Oslo, Norway
    Schizophr Res 119:11-7. 2010
    ..This study explored the prevalence and characteristics of suicidality in patients with a first episode of psychosis (FEP) in two time intervals: 1) prior to study entry and 2) explicitly in the period of untreated psychosis...
  22. doi request reprint Definitions of the term 'recovered' in schizophrenia and other disorders
    Ann Faerden
    Department of Psychiatric Research, Ulleval University Hospital, Oslo, Norway
    Psychopathology 41:271-8. 2008
    ..In the present study different definitions of recovered in schizophrenia are reviewed and compared with similar definitions in other fields of medicine...