Henderikus Knegtering

Summary

Affiliation: University Medical Center Groningen
Country: The Netherlands

Publications

  1. ncbi request reprint Effects and side effects of antipsychotic treatment in schizophrenia: pros and cons of available self-rating scales
    Hugo A Wolters
    University Center for Psychiatry, University Medical Center Groningen, University of Groningen, The Netherlands
    Schizophr Res 112:114-8. 2009
  2. doi request reprint Are sexual side effects of prolactin-raising antipsychotics reducible to serum prolactin?
    Henderikus Knegtering
    Department of Psychiatry, University Medical Center Groningen, University of Groningen, Hanzeplein 1, PO Box 30 001, 9700 RB Groningen, The Netherlands
    Psychoneuroendocrinology 33:711-7. 2008
  3. ncbi request reprint Predominant role of the 9-hydroxy metabolite of risperidone in elevating blood prolactin levels
    Rikus Knegtering
    Department of Psychiatry, University Hospital Groningen, The Netherlands
    Am J Psychiatry 162:1010-2. 2005
  4. ncbi request reprint [Antipsychotics and sexual functioning in persons with psychoses]
    H Knegtering
    Tijdschr Psychiatr 49:733-42. 2007
  5. ncbi request reprint A randomized open-label comparison of the impact of olanzapine versus risperidone on sexual functioning
    H Knegtering
    Department of Psychiatry, University Medical Center Groningen, Groningen, The Netherlands
    J Sex Marital Ther 32:315-26. 2006
  6. pmc When Broca goes uninformed: reduced information flow to Broca's area in schizophrenia patients with auditory hallucinations
    Branislava Curcic-Blake
    Department of Neuroscience, University of Groningen, Groningen, The Netherlands
    Schizophr Bull 39:1087-95. 2013
  7. pmc Altered resting state connectivity of the default mode network in alexithymia
    Edith J Liemburg
    Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW, Groningen, The Netherlands
    Soc Cogn Affect Neurosci 7:660-6. 2012
  8. doi request reprint Functional connectivity of the temporo-parietal region in schizophrenia: effects of rTMS treatment of auditory hallucinations
    Ans Vercammen
    Department of Neuroscience, University Medical Center Groningen, The Netherlands
    J Psychiatr Res 44:725-31. 2010
  9. doi request reprint A brief version of the Subjects' Response to Antipsychotics questionnaire to evaluate treatment effects
    Irene M Lako
    Rob Giel Research Center RGOc, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
    Schizophr Res 147:175-80. 2013
  10. ncbi request reprint The Antipsychotics and Sexual Functioning Questionnaire (ASFQ): preliminary evidence for reliability and validity
    Marrit K de Boer
    University of Groningen, University Medical Center Groningen, Department of Psychiatry, Groningen, The Netherlands Electronic address
    Schizophr Res 150:410-5. 2013

Collaborators

Detail Information

Publications31

  1. ncbi request reprint Effects and side effects of antipsychotic treatment in schizophrenia: pros and cons of available self-rating scales
    Hugo A Wolters
    University Center for Psychiatry, University Medical Center Groningen, University of Groningen, The Netherlands
    Schizophr Res 112:114-8. 2009
    ..The aim of this study is to compare the psychometric properties and other characteristics of frequently used self-rating scales, and also to study their relationship to subjective quality of life...
  2. doi request reprint Are sexual side effects of prolactin-raising antipsychotics reducible to serum prolactin?
    Henderikus Knegtering
    Department of Psychiatry, University Medical Center Groningen, University of Groningen, Hanzeplein 1, PO Box 30 001, 9700 RB Groningen, The Netherlands
    Psychoneuroendocrinology 33:711-7. 2008
    ..To assess the degree to which sexual side effects (SSE) are associated with prolactin-raising antipsychotics, and to what degree such SSE are reducible to serum prolactin levels...
  3. ncbi request reprint Predominant role of the 9-hydroxy metabolite of risperidone in elevating blood prolactin levels
    Rikus Knegtering
    Department of Psychiatry, University Hospital Groningen, The Netherlands
    Am J Psychiatry 162:1010-2. 2005
    ..The authors examined the contributory role of risperidone's active metabolite 9-hydroxy-risperidone by measuring plasma concentrations of risperidone, 9-hydroxy-risperidone, and prolactin...
  4. ncbi request reprint [Antipsychotics and sexual functioning in persons with psychoses]
    H Knegtering
    Tijdschr Psychiatr 49:733-42. 2007
    ..So far little research has been done into sexual dysfunctions that develop during the use of antipsychotics. However, over the last 10 years a great deal of new and clinically useful information has become available...
  5. ncbi request reprint A randomized open-label comparison of the impact of olanzapine versus risperidone on sexual functioning
    H Knegtering
    Department of Psychiatry, University Medical Center Groningen, Groningen, The Netherlands
    J Sex Marital Ther 32:315-26. 2006
    ..Direct questioning about sexual functioning is necessary to avoid underestimating the frequency of sexual side effects in patients with schizophrenia and related psychotic disorders...
  6. pmc When Broca goes uninformed: reduced information flow to Broca's area in schizophrenia patients with auditory hallucinations
    Branislava Curcic-Blake
    Department of Neuroscience, University of Groningen, Groningen, The Netherlands
    Schizophr Bull 39:1087-95. 2013
    ..In addition, a lack of synchronization between Broca and its homolog may lead to the erroneous interpretation of emotional speech activity from the right hemisphere as coming from an external source. ..
  7. pmc Altered resting state connectivity of the default mode network in alexithymia
    Edith J Liemburg
    Neuroimaging Center, Antonius Deusinglaan 2, 9713 AW, Groningen, The Netherlands
    Soc Cogn Affect Neurosci 7:660-6. 2012
    ..On the other hand, alexithymia was associated with stronger functional connections of the DMN with brain areas involved in sensory input and control of emotion...
  8. doi request reprint Functional connectivity of the temporo-parietal region in schizophrenia: effects of rTMS treatment of auditory hallucinations
    Ans Vercammen
    Department of Neuroscience, University Medical Center Groningen, The Netherlands
    J Psychiatr Res 44:725-31. 2010
    ..However, the relationship between these functional changes during the resting state and the rate of clinical improvement needs further clarification...
  9. doi request reprint A brief version of the Subjects' Response to Antipsychotics questionnaire to evaluate treatment effects
    Irene M Lako
    Rob Giel Research Center RGOc, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
    Schizophr Res 147:175-80. 2013
    ..We aimed to develop a shorter version of a comprehensive 74-item self-report questionnaire suitable for routine monitoring of desired and undesired effects of antipsychotics...
  10. ncbi request reprint The Antipsychotics and Sexual Functioning Questionnaire (ASFQ): preliminary evidence for reliability and validity
    Marrit K de Boer
    University of Groningen, University Medical Center Groningen, Department of Psychiatry, Groningen, The Netherlands Electronic address
    Schizophr Res 150:410-5. 2013
    ..Based on preliminary evidence, it can be concluded that the Antipsychotics and Sexual Functioning Questionnaire has reasonable reliability and is available for clinical use and research. ..
  11. doi request reprint Two subdomains of negative symptoms in psychotic disorders: established and confirmed in two large cohorts
    Edith Liemburg
    Department of Neuroscience, and BCN Neuroimaging Center, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands
    J Psychiatr Res 47:718-25. 2013
    ..This factor structure supports the DSM-V classification and may be relevant for pathophysiology and treatment of schizophrenia and other psychotic disorders...
  12. pmc Reduced connectivity in the self-processing network of schizophrenia patients with poor insight
    Edith J Liemburg
    Department of Neuroscience, University Medical Center Groningen and BCN NeuroImaging Center, University of Groningen, Groningen, The Netherlands
    PLoS ONE 7:e42707. 2012
    ..This finding is compatible with theories implying a role of reduced self-referential processing as a mechanism contributing to poor insight...
  13. doi request reprint Abnormal connectivity between attentional, language and auditory networks in schizophrenia
    Edith J Liemburg
    Department of Neuroscience, University Medical Center Groningen, and BCN Neuroimaging Center, University of Groningen, Antonius Deusinglaan 2, 9713 AW Groningen, The Netherlands
    Schizophr Res 135:15-22. 2012
    ..This altered connectivity pattern appears to be present independent of symptom severity, and may be suggestive of a trait, rather than a state characteristic...
  14. pmc Subjective loudness and reality of auditory verbal hallucinations and activation of the inner speech processing network
    Ans Vercammen
    Department of Neuroscience, University Medical Center Groningen, Groningen, The Netherlands
    Schizophr Bull 37:1009-16. 2011
    ..We aimed to assess whether subjective perceptual and experiential characteristics may be linked to neural activation in the inner speech processing network...
  15. pmc Structural covariance in the hallucinating brain: a voxel-based morphometry study
    Gemma Modinos
    BCN Neuroimaging Center, Department of Neuroscience, University of Groningen, Groningen, The Netherlands
    J Psychiatry Neurosci 34:465-9. 2009
    ..We used voxel-based morphometry to examine regional grey matter volumes and structural covariance associated with severity of auditory verbal hallucinations...
  16. doi request reprint Auditory hallucinations in schizophrenia are associated with reduced functional connectivity of the temporo-parietal area
    Ans Vercammen
    Department of Neuroscience, University Medical Center Groningen, BCN Neuroimaging Center, University of Groningen, The Netherlands
    Biol Psychiatry 67:912-8. 2010
    ....
  17. ncbi request reprint A systematic review of instruments to measure sexual functioning in patients using antipsychotics
    Marrit K de Boer
    a Department of Psychiatry, University Medical Center Groningen, University of Groningen
    J Sex Res 51:383-9. 2014
    ..The ASFQ assesses improvement as well as deterioration of sexual functioning, and includes items about hyperprolactinemia. The CSFQ-14 is useful when self-report is desired but contains more items. ..
  18. doi request reprint Antipsychotic medication and prefrontal cortex activation: a review of neuroimaging findings
    Edith J Liemburg
    Neuroimaging Center, Department of Neuroscience, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 2 9713 AW Groningen, The Netherlands
    Eur Neuropsychopharmacol 22:387-400. 2012
    ....
  19. doi request reprint Abnormal externally guided movement preparation in recent-onset schizophrenia is associated with impaired selective attention to external input
    Henderikus G O M Smid
    Department of Psychiatry, University Medical Center Groningen, University of Groningen, PO Box 30 001, 9700 RB Groningen, The Netherlands
    Psychiatry Res 170:75-81. 2009
    ....
  20. ncbi request reprint Guided discontinuation versus maintenance treatment in remitted first-episode psychosis: relapse rates and functional outcome
    Lex Wunderink
    University Medical Center Groningen, University of Groningen, Department of Psychiatry, Groningen, The Netherlands
    J Clin Psychiatry 68:654-61. 2007
    ..To compare the consequences of a guided discontinuation strategy and maintenance treatment in remitted first-episode psychosis in terms of relapse rates and functional outcome...
  21. doi request reprint Repetitive transcranial magnetic stimulation for negative symptoms of schizophrenia: review and meta-analysis
    Jozarni J Dlabac-de Lange
    Department of Pschiatry, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
    J Clin Psychiatry 71:411-8. 2010
    ..During the past decade, several trials have reported on the efficacy of rTMS treatment; however, the results were inconsistent...
  22. ncbi request reprint A randomized open-label study of the impact of quetiapine versus risperidone on sexual functioning
    Rikus Knegtering
    Department of Psychiatry, University Hospital Groningen, The Netherlands
    J Clin Psychopharmacol 24:56-61. 2004
    ..To compare sexual functioning in patients treated with quetiapine or risperidone...
  23. ncbi request reprint [Pharmacological treatment of negative symptoms in schizophrenia; research and practice]
    V C R Jiawan
    Universitair Centrum Psychiatrie, Groningen
    Tijdschr Psychiatr 52:627-37. 2010
    ..The treatment options for negative symptoms are extremely limited. Various treatment strategies have been studied in which several types of medication were added to antipsychotics in order to alleviate negative symptoms...
  24. ncbi request reprint The effectiveness of peer support groups in psychosis: a randomized controlled trial
    S Castelein
    Rob Giel Research Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
    Acta Psychiatr Scand 118:64-72. 2008
    ....
  25. ncbi request reprint [Peer support groups improve quality of life of people with psychosis]
    Stynke Castelein
    Lentis Groningen, Groningen, The Netherlands
    Ned Tijdschr Geneeskd 154:A1768. 2010
    ..Intervention adherence, i.e. group attendance, is an important determinant of its effect. The method fits well with the needs of this patient group and results in no extra healthcare costs...
  26. ncbi request reprint What are the effects of antipsychotics on sexual dysfunctions and endocrine functioning?
    H Knegtering
    Department of Psychiatry, University Hospital Groningen, Hanzeplein 1, 9700 RB, P O Box 30 001, Groningen, The Netherlands
    Psychoneuroendocrinology 28:109-23. 2003
    ..Lowering the dosage or switching to a prolactin-sparing antipsychotic often reduces sexual side effects, amenorrhoea, and galactorrhoea...
  27. doi request reprint Effects of bilateral repetitive transcranial magnetic stimulation on treatment resistant auditory-verbal hallucinations in schizophrenia: a randomized controlled trial
    Ans Vercammen
    Department of Neuroscience, University Medical Center Groningen and BCN NeuroImaging Center, University of Groningen, The Netherlands
    Schizophr Res 114:172-9. 2009
    ..This study aimed to investigate whether 1 Hz repetitive transcranial magnetic stimulation (rTMS) of the bilateral temporo-parietal region would lead to increased effectiveness in the management of AVH, compared to left rTMS or placebo...
  28. ncbi request reprint Sex differences in concomitant medication with benzodiazepines or antidepressants in first-break schizophrenic patients treated with antipsychotic medication
    Claudia A W Rijcken
    Department of Social Pharmacy and Pharmacoepidemiology, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
    Psychiatry Res 134:143-50. 2005
    ..Furthermore, we recommend investigating the possible correlation between benzodiazepine use and substance abuse as a way of treating premorbid symptoms of schizophrenia...
  29. ncbi request reprint Evaluation of the subjects' response to antipsychotics questionnaire
    Hugo A Wolters
    Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
    Int Clin Psychopharmacol 21:63-9. 2006
    ..The SRA Questionnaire appears to be a reliable and efficient way of measuring patients' subjective responses to antipsychotic medication...
  30. ncbi request reprint Niacin skin flushing in schizophrenic and depressed patients and healthy controls
    Linda Bosveld-van Haandel
    University Medical Centre Groningen UMCG, Department of Psychiatry, 9700 RB Groningen, The Netherlands
    Psychiatry Res 143:303-6. 2006
    ..Although the three groups could be differentiated by the niacin flushing test, to develop a reliable clinical application of this test, further research is necessary...
  31. ncbi request reprint Low essential fatty acid and B-vitamin status in a subgroup of patients with schizophrenia and its response to dietary supplementation
    R F J Kemperman
    Department of Pathology and Laboratory Medicine, CMC V, Room Y3 181, University Medical Center Groningen, P O Box 30 001, 9700 RB Groningen, The Netherlands
    Prostaglandins Leukot Essent Fatty Acids 74:75-85. 2006
    ..Correction seems indicated in view of the possible relation of poor EFA and B-vitamin status with some of their psychiatric symptoms, but notably to reduce their high risk of cardiovascular disease...