Erik Johnsen

Summary

Publications

  1. doi request reprint The serum level of C-reactive protein (CRP) is associated with cognitive performance in acute phase psychosis
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    BMC Psychiatry 16:60. 2016
  2. ncbi request reprint Practice regarding antipsychotic therapy: a cross-sectional survey in two Norwegian hospitals
    E Johnsen
    Bergen Psychiatric University Hospital, NO 5035 Bergen, Norway
    Nord J Psychiatry 58:313-7. 2004
  3. doi request reprint Cardiovascular risk in patients admitted for psychosis compared with findings from a population-based study
    Erik Johnsen
    Haukeland University Hospital, University of Bergen, Department of Clinical Medicine, Section of Psychiatry, Sandviken, PB 23, N 5812 Bergen, Norway
    Nord J Psychiatry 65:192-202. 2011
  4. doi request reprint Antipsychotic-induced hyperprolactinemia: a cross-sectional survey
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Bergen, Norway
    J Clin Psychopharmacol 28:686-90. 2008
  5. ncbi request reprint [Hyperprolactinemia induced by antipsychotic agents]
    Erik Johnsen
    Bergen Mental Health Research Center, Institutt for klinisk medisin, seksjon psykiatri, Universitet i Bergen og Psykiatrisk divisjon, Sandviken Haukeland Universitetssjukehus, 5812 Bergen
    Tidsskr Nor Laegeforen 126:179-80. 2006
  6. pmc Effectiveness of second generation antipsychotics: a systematic review of randomized trials
    Erik Johnsen
    Haukeland University Hospital, Division of Psychiatry, Sandviken, PO Box 23, N 5812, Bergen, Norway
    BMC Psychiatry 8:31. 2008
  7. pmc Effectiveness of second-generation antipsychotics: a naturalistic, randomized comparison of olanzapine, quetiapine, risperidone, and ziprasidone
    Erik Johnsen
    Division of Psychiatry, H aukeland University Hospital, Sandviken, PB 23, N 5812 Bergen, Norway
    BMC Psychiatry 10:26. 2010
  8. pmc Hallucinations in acutely admitted patients with psychosis, and effectiveness of risperidone, olanzapine, quetiapine, and ziprasidone: a pragmatic, randomized study
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Norway
    BMC Psychiatry 13:241. 2013
  9. doi request reprint Failure of attention focus and cognitive control in schizophrenia patients with auditory verbal hallucinations: evidence from dichotic listening
    Kenneth Hugdahl
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Schizophr Res 147:301-9. 2013
  10. pmc Anti-depressive effectiveness of olanzapine, quetiapine, risperidone and ziprasidone: a pragmatic, randomized trial
    Eirik Kjelby
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Norway
    BMC Psychiatry 11:145. 2011

Detail Information

Publications23

  1. doi request reprint The serum level of C-reactive protein (CRP) is associated with cognitive performance in acute phase psychosis
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    BMC Psychiatry 16:60. 2016
    ..The aim of the present study was to investigate possible associations between the level of the inflammation marker C-reactive protein (CRP) and cognitive performance in patients through the acute phase of psychosis...
  2. ncbi request reprint Practice regarding antipsychotic therapy: a cross-sectional survey in two Norwegian hospitals
    E Johnsen
    Bergen Psychiatric University Hospital, NO 5035 Bergen, Norway
    Nord J Psychiatry 58:313-7. 2004
    ..We conclude that FAPs are still commonly prescribed. Antipsychotic combination therapy is used despite of lack of evidence for efficacy, and is associated with increased prescription rates of anticholinergics and benzodiazepines...
  3. doi request reprint Cardiovascular risk in patients admitted for psychosis compared with findings from a population-based study
    Erik Johnsen
    Haukeland University Hospital, University of Bergen, Department of Clinical Medicine, Section of Psychiatry, Sandviken, PB 23, N 5812 Bergen, Norway
    Nord J Psychiatry 65:192-202. 2011
    ..Schizophrenia and related psychoses are associated with excess morbidity and mortality from cardiovascular disease (CVD). Single-site studies on CVD-related risk factors in representative samples of acutely admitted inpatients are scarce...
  4. doi request reprint Antipsychotic-induced hyperprolactinemia: a cross-sectional survey
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Bergen, Norway
    J Clin Psychopharmacol 28:686-90. 2008
    ..Macroprolactin may cause misdiagnosis of hyperprolactinemia...
  5. ncbi request reprint [Hyperprolactinemia induced by antipsychotic agents]
    Erik Johnsen
    Bergen Mental Health Research Center, Institutt for klinisk medisin, seksjon psykiatri, Universitet i Bergen og Psykiatrisk divisjon, Sandviken Haukeland Universitetssjukehus, 5812 Bergen
    Tidsskr Nor Laegeforen 126:179-80. 2006
  6. pmc Effectiveness of second generation antipsychotics: a systematic review of randomized trials
    Erik Johnsen
    Haukeland University Hospital, Division of Psychiatry, Sandviken, PO Box 23, N 5812, Bergen, Norway
    BMC Psychiatry 8:31. 2008
    ..Effectiveness studies, also known as naturalistic, pragmatic, practical or real life studies, adhere to these principles as they aim to mimic daily clinical practice and have longer follow-up...
  7. pmc Effectiveness of second-generation antipsychotics: a naturalistic, randomized comparison of olanzapine, quetiapine, risperidone, and ziprasidone
    Erik Johnsen
    Division of Psychiatry, H aukeland University Hospital, Sandviken, PB 23, N 5812 Bergen, Norway
    BMC Psychiatry 10:26. 2010
    ....
  8. pmc Hallucinations in acutely admitted patients with psychosis, and effectiveness of risperidone, olanzapine, quetiapine, and ziprasidone: a pragmatic, randomized study
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Norway
    BMC Psychiatry 13:241. 2013
    ....
  9. doi request reprint Failure of attention focus and cognitive control in schizophrenia patients with auditory verbal hallucinations: evidence from dichotic listening
    Kenneth Hugdahl
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Schizophr Res 147:301-9. 2013
    ..Future research should pin down the neuronal basis of both the origination and the attentional and cognitive control aspects of AVHs...
  10. pmc Anti-depressive effectiveness of olanzapine, quetiapine, risperidone and ziprasidone: a pragmatic, randomized trial
    Eirik Kjelby
    Division of Psychiatry, Haukeland University Hospital, Sandviken, Norway
    BMC Psychiatry 11:145. 2011
    ..The aim of the study is to investigate whether differential anti-depressive effectiveness exists among SGAs in a clinically relevant sample of patients acutely admitted with psychosis...
  11. doi request reprint Glutamate as a mediating transmitter for auditory hallucinations in schizophrenia: a (1)H MRS study
    Kenneth Hugdahl
    Department of Biological and Medical Psychology, University of Bergen, Norway Division of Psychiatry, Haukeland University Hospital, Bergen, Norway Department of Radiology, Haukeland University Hospital, Bergen, Norway NORMENT Center of Excellence, University of Oslo and Oslo University Hospital, Norway Electronic address
    Schizophr Res 161:252-60. 2015
    ..It is concluded that the results show for the first time that glutamate may be a mediating factor in auditory hallucinations in schizophrenia. ..
  12. pmc Treatment of schizophrenia with antipsychotics in Norwegian emergency wards, a cross-sectional national study
    Rune A Kroken
    Division of Psychiatry, Haukeland University Hospital, PO Box 23, N 5812, Bergen, Norway
    BMC Psychiatry 9:24. 2009
    ..The objective of this study was to evaluate the practice of treatment of schizophrenic patients with antipsychotics at discharge from acute inpatient settings at a national level...
  13. pmc Impact of glutamate levels on neuronal response and cognitive abilities in schizophrenia
    Liv E Falkenberg
    Department of Biological and Medical Psychology, University of Bergen, Haukeland University Hospital, Bergen, Norway
    Neuroimage Clin 4:576-84. 2014
    ..This could be targeted in future research on glutamatergic treatment of cognitive symptoms in schizophrenia. ..
  14. doi request reprint Is rational antipsychotic polytherapy feasible? A selective review
    Rune Andreas Kroken
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Curr Psychiatry Rep 14:244-51. 2012
    ..Some basic and clinical evidence for the addition of aripiprazole to lower prolactin levels was identified. In conclusion, there is very limited support in the evidence for the feasibility of rational APT...
  15. doi request reprint Cannabis use is associated with 3years earlier onset of schizophrenia spectrum disorder in a naturalistic, multi-site sample (N=1119)
    Siri Helle
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway Electronic address
    Schizophr Res 170:217-21. 2016
    ....
  16. doi request reprint Borderline Personality Disorder and Posttraumatic Stress Disorder at Psychiatric Discharge Predict General Hospital Admission for Self-Harm
    Liv Mellesdal
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    J Trauma Stress 28:556-62. 2015
    ..28, p < .05), and also through PTSD. These results suggested that PTSD and related dysregulation problems could be important treatment targets for a reduction in the risk of severe self-harm in high-risk psychiatric patients. ..
  17. doi request reprint Cognitive changes in patients with acute phase psychosis--effects of illicit drug use
    Siri Helle
    Division of Psychiatry, Haukeland University Hospital, Sandviksleitet 1, N 5035 Bergen, Norway Electronic address
    Psychiatry Res 220:818-24. 2014
    ..This suggests that the illicit drug users constitute a sub-group with less stable cognitive deficits and less cognitive vulnerability. ..
  18. doi request reprint Dichotic listening, executive functions and grey matter cortical volume in patients with schizophrenia and healthy controls
    Merethe Nygård
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Scand J Psychol 54:443-50. 2013
    ..It is however concluded that patients with schizophrenia are impaired in executive functions and that they also show reduced GM volumes in left frontal and right temporal lobe areas, compared to healthy controls. ..
  19. doi request reprint Neuropsychopharmacology of auditory hallucinations: insights from pharmacological functional MRI and perspectives for future research
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Expert Rev Neurother 13:23-36. 2013
    ..Future directions for pharmacological neuroimaging of auditory hallucinations are discussed...
  20. doi request reprint Auditory verbal hallucinations in schizophrenia as aberrant lateralized speech perception: evidence from dichotic listening
    Kenneth Hugdahl
    Department of Biological and Medical Psychology, University of Bergen, Norway
    Schizophr Res 140:59-64. 2012
    ..The results are unambiguous evidence for AVHs as aberrant speech perceptions originating in the left hemisphere...
  21. doi request reprint Auditory verbal hallucinations reflect stable auditory attention deficits: a prospective study
    Else Marie Løberg
    a Division of Psychiatry, Haukeland University Hospital, Bergen, Norway
    Cogn Neuropsychiatry 20:81-94. 2015
    ..The aim of this study was to follow patients with acute psychosis with and without AVH, and to test their auditory attention in a more stabilised clinical phase...
  22. pmc Sexual dysfunction and hyperprolactinemia in male psychotic inpatients: a cross-sectional study
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, Sandviksleitet 1, 5035 Bergen, Norway
    Adv Urol 2011:686924. 2011
    ..No association was found between prolactin levels and SD. Conclusion. High rates of SD and hyperprolactinemia were found in male patients and should be a treatment target. SD and hyperprolactinemia were not correlated...
  23. pmc Drug treatment developments in schizophrenia and bipolar mania: latest evidence and clinical usefulness
    Erik Johnsen
    Division of Psychiatry, Haukeland University Hospital, and Section of Psychiatry, Department of Clinical Medicine, University of Bergen, Sandviksleitet 1, N 5035 Bergen, Norway
    Ther Adv Chronic Dis 3:287-300. 2012
    ..In patients with a prior drug history the different pharmacological and clinical profiles may be exploited in subsequent choices of drugs...