I E Sommer

Summary

Affiliation: University Medical Center Utrecht
Country: The Netherlands

Publications

  1. ncbi The genetics of symptom dimensions of schizophrenia: review and meta-analysis
    T Rietkerk
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, B01 206, University Medical Centre Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
    Schizophr Res 102:197-205. 2008
  2. ncbi The influence of amphetamine on language activation: an fMRI study
    Iris E C Sommer
    Rudolf Magnus Institute of Neuroscience Psychiatry Department, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Psychopharmacology (Berl) 183:387-93. 2006
  3. ncbi Language lateralization in schizophrenia, an fMRI study
    I E Sommer
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Schizophr Res 52:57-67. 2001
  4. ncbi Language lateralization in monozygotic twin pairs concordant and discordant for handedness
    I E C Sommer
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, Neuroscience Division, University Medical Centre Utrecht, The Netherlands
    Brain 125:2710-8. 2002
  5. ncbi Language lateralization in female patients with schizophrenia: an fMRI study
    I E C Sommer
    Department of Neuroscience, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Schizophr Res 60:183-90. 2003
  6. ncbi Language activation in monozygotic twins discordant for schizophrenia
    Iris E C Sommer
    Rudolf Magnus Institute of Neuroscience Psychiatry Department, University Medical Center, Utrecht, The Netherlands
    Br J Psychiatry 184:128-35. 2004
  7. ncbi Do women really have more bilateral language representation than men? A meta-analysis of functional imaging studies
    Iris E C Sommer
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
    Brain 127:1845-52. 2004
  8. ncbi [Bizarre somatic complaints as a manifestation of schizophrenia]
    I E C Sommer
    Afd Stemmingsstoornissen, Universitair Medisch Centrum Utrecht, divisie Hersenen, B01 206, Heidelberglaan 100, 3584 CX Utrecht
    Ned Tijdschr Geneeskd 149:217-20. 2005
  9. ncbi Combined analysis of language tasks in fMRI improves assessment of hemispheric dominance for language functions in individual subjects
    N F Ramsey
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, 3584 CX, Netherlands
    Neuroimage 13:719-33. 2001
  10. ncbi Investigating gene environment interaction in complex diseases: increasing power by selective sampling for environmental exposure
    M P M Boks
    The Rudolf Magnus Institute of Neuroscience, Department of Psychiatry University Medical Centre Utrecht, Utrecht, The Netherlands
    Int J Epidemiol 36:1363-9. 2007

Collaborators

Detail Information

Publications16

  1. ncbi The genetics of symptom dimensions of schizophrenia: review and meta-analysis
    T Rietkerk
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, B01 206, University Medical Centre Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
    Schizophr Res 102:197-205. 2008
    ..However, the genetic background of symptom dimensions is not clear...
  2. ncbi The influence of amphetamine on language activation: an fMRI study
    Iris E C Sommer
    Rudolf Magnus Institute of Neuroscience Psychiatry Department, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Psychopharmacology (Berl) 183:387-93. 2006
    ..In humans, cerebral dopamine neurotransmission is also correlated to motor dominance. Since language dominance is related to motor dominance, amphetamine might also affect cerebral dominance for language...
  3. ncbi Language lateralization in schizophrenia, an fMRI study
    I E Sommer
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Schizophr Res 52:57-67. 2001
    ..54, p<0.05). We postulate that decreased language lateralization in schizophrenia may result from failure to inhibit the right hemisphere...
  4. ncbi Language lateralization in monozygotic twin pairs concordant and discordant for handedness
    I E C Sommer
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, Neuroscience Division, University Medical Centre Utrecht, The Netherlands
    Brain 125:2710-8. 2002
    ..Discordant language dominance may be caused by a relatively late time of splitting of the original embryo, which disrupts the normal development of left-right asymmetry...
  5. ncbi Language lateralization in female patients with schizophrenia: an fMRI study
    I E C Sommer
    Department of Neuroscience, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands
    Schizophr Res 60:183-90. 2003
    ..These findings indicate that lower language lateralization in women is not likely to underlie gender differences in schizophrenia...
  6. ncbi Language activation in monozygotic twins discordant for schizophrenia
    Iris E C Sommer
    Rudolf Magnus Institute of Neuroscience Psychiatry Department, University Medical Center, Utrecht, The Netherlands
    Br J Psychiatry 184:128-35. 2004
    ..In previous functional magnetic resonance imaging (fMRI) studies, participants with schizophrenia showed decreased language lateralisation, resulting from increased activation of the right hemisphere compared with controls...
  7. ncbi Do women really have more bilateral language representation than men? A meta-analysis of functional imaging studies
    Iris E C Sommer
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
    Brain 127:1845-52. 2004
    ..It is therefore not likely that differences in language lateralization underlie the general sex differences in cognitive performance, and the neuronal basis for these cognitive sex differences remains elusive...
  8. ncbi [Bizarre somatic complaints as a manifestation of schizophrenia]
    I E C Sommer
    Afd Stemmingsstoornissen, Universitair Medisch Centrum Utrecht, divisie Hersenen, B01 206, Heidelberglaan 100, 3584 CX Utrecht
    Ned Tijdschr Geneeskd 149:217-20. 2005
    ..The patient's visit to a somatic or general physician is a good opportunity to refer him or her for adequate psychiatric treatment...
  9. ncbi Combined analysis of language tasks in fMRI improves assessment of hemispheric dominance for language functions in individual subjects
    N F Ramsey
    Department of Psychiatry, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, 3584 CX, Netherlands
    Neuroimage 13:719-33. 2001
    ..Also, the CTA results are very similar to those obtained with conjunction analysis of the same data...
  10. ncbi Investigating gene environment interaction in complex diseases: increasing power by selective sampling for environmental exposure
    M P M Boks
    The Rudolf Magnus Institute of Neuroscience, Department of Psychiatry University Medical Centre Utrecht, Utrecht, The Netherlands
    Int J Epidemiol 36:1363-9. 2007
    ..However, gene environmental interactions (GEIs) are not easily studied, since high numbers of subjects are required to detect GEI...
  11. ncbi Hand-preference and population schizotypy: a meta-analysis
    M Somers
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, B01 206, University Medical Centre Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
    Schizophr Res 108:25-32. 2009
    ..Bilateral language organisation may underlie loosening of association, possibly leading to higher schizotypy scores...
  12. ncbi Reviewing the role of the genes G72 and DAAO in glutamate neurotransmission in schizophrenia
    M P M Boks
    Department of Psychiatry, B01 206, University Medical Centre Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
    Eur Neuropsychopharmacol 17:567-72. 2007
    ..The involvement of this gene is therefore indirect support for the glutamate dysfunction hypothesis in schizophrenia...
  13. ncbi A vanishing lesion in the temporal lobe associated with schizophrenialike psychosis and catatonia
    Kuan H Kho
    Department of Neurosurgery, Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
    Cogn Behav Neurol 20:232-4. 2007
    ..To present the case of a patient with hallucinations and psychotic symptoms that co-occurs with a temporary lesion in the left posterior temporal lobe...
  14. ncbi Deactivation of the parahippocampal gyrus preceding auditory hallucinations in schizophrenia
    Kelly M J Diederen
    Department of Psychiatry, Neuroscience Division, University Medical Center, Utrecht, The Netherlands
    Am J Psychiatry 167:427-35. 2010
    ..It remains unclear, however, how this activation is triggered. Identifying brain regions that show significant signal changes preceding auditory hallucinations might reveal the origin of these hallucinations...
  15. ncbi Schizophrenia risk factors constitute general risk factors for psychiatric symptoms in the population
    Elemi J Breetvelt
    Rudolf Magnus Institute of Neuroscience, Department of Psychiatry, University Medical Center Utrecht, Utrecht, The Netherlands
    Schizophr Res 120:184-90. 2010
    ..However, to our knowledge no large-scale studies have been conducted which examine the specificity of these risk factors in the general population...
  16. ncbi Left with the voices or hearing right? Lateralization of auditory verbal hallucinations in schizophrenia
    Iris E C Sommer
    J Psychiatry Neurosci 28:217-8; author reply 218-9. 2003