Ryu Takizawa

Summary

Affiliation: University of Tokyo
Country: Japan

Publications

  1. ncbi Association between sigma-1 receptor gene polymorphism and prefrontal hemodynamic response induced by cognitive activation in schizophrenia
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Japan
    Prog Neuropsychopharmacol Biol Psychiatry 33:491-8. 2009
  2. ncbi Reduced frontopolar activation during verbal fluency task in schizophrenia: a multi-channel near-infrared spectroscopy study
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Schizophr Res 99:250-62. 2008
  3. ncbi Association between catechol-O-methyltrasferase Val108/158Met genotype and prefrontal hemodynamic response in schizophrenia
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    PLoS ONE 4:e5495. 2009
  4. ncbi Multiple-time replicability of near-infrared spectroscopy recording during prefrontal activation task in healthy men
    Toshiaki Kono
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan
    Neurosci Res 57:504-12. 2007
  5. ncbi Decreased prefrontal activation during letter fluency task in adults with pervasive developmental disorders: a near-infrared spectroscopy study
    Hitoshi Kuwabara
    Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan
    Behav Brain Res 172:272-7. 2006
  6. ncbi Different hemodynamic response patterns in the prefrontal cortical sub-regions according to the clinical stages of psychosis
    Shinsuke Koike
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo ku, Tokyo 113 8655, Japan
    Schizophr Res 132:54-61. 2011
  7. ncbi Gender difference in right lateral prefrontal hemodynamic response while viewing fearful faces: a multi-channel near-infrared spectroscopy study
    Kohei Marumo
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Neurosci Res 63:89-94. 2009
  8. ncbi Association between severe dorsolateral prefrontal dysfunction during random number generation and earlier onset in schizophrenia
    Shinsuke Koike
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Clin Neurophysiol 122:1533-40. 2011
  9. ncbi Developmental changes of prefrontal activation in humans: a near-infrared spectroscopy study of preschool children and adults
    Yuki Kawakubo
    Department of Child Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
    PLoS ONE 6:e25944. 2011
  10. ncbi Phonological fluency is uniquely impaired in Japanese-speaking schizophrenia patients: confirmation study
    Motomu Suga
    Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
    Psychiatry Clin Neurosci 65:672-5. 2011

Detail Information

Publications11

  1. ncbi Association between sigma-1 receptor gene polymorphism and prefrontal hemodynamic response induced by cognitive activation in schizophrenia
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Japan
    Prog Neuropsychopharmacol Biol Psychiatry 33:491-8. 2009
    ..Our findings also suggest that the prefrontal hemodynamic response assessed by noninvasive and less demanding NIRS is a useful intermediate phenotype for translational research in schizophrenia...
  2. ncbi Reduced frontopolar activation during verbal fluency task in schizophrenia: a multi-channel near-infrared spectroscopy study
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Schizophr Res 99:250-62. 2008
    ....
  3. ncbi Association between catechol-O-methyltrasferase Val108/158Met genotype and prefrontal hemodynamic response in schizophrenia
    Ryu Takizawa
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    PLoS ONE 4:e5495. 2009
    ..Here, we investigated spatiotemporal characteristics of the association between prefrontal hemodynamic activation and the COMT genotype using a noninvasive neuroimaging technique, near-infrared spectroscopy (NIRS)...
  4. ncbi Multiple-time replicability of near-infrared spectroscopy recording during prefrontal activation task in healthy men
    Toshiaki Kono
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan
    Neurosci Res 57:504-12. 2007
    ..Further studies using different conditions or assessing sensitivity to longitudinal changes following interventions are necessary...
  5. ncbi Decreased prefrontal activation during letter fluency task in adults with pervasive developmental disorders: a near-infrared spectroscopy study
    Hitoshi Kuwabara
    Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan
    Behav Brain Res 172:272-7. 2006
    ..The present results may be also potentially useful for applying NIRS to clinical settings of child psychiatry...
  6. ncbi Different hemodynamic response patterns in the prefrontal cortical sub-regions according to the clinical stages of psychosis
    Shinsuke Koike
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo ku, Tokyo 113 8655, Japan
    Schizophr Res 132:54-61. 2011
    ..Multichannel near-infrared spectroscopy (NIRS), which can easily and noninvasively measure hemodynamics over the prefrontal cortex, is a candidate instrument for clinical use...
  7. ncbi Gender difference in right lateral prefrontal hemodynamic response while viewing fearful faces: a multi-channel near-infrared spectroscopy study
    Kohei Marumo
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Neurosci Res 63:89-94. 2009
    ..This observation may help to establish NIRS as a clinical tool for monitoring prefrontal function on an individual basis...
  8. ncbi Association between severe dorsolateral prefrontal dysfunction during random number generation and earlier onset in schizophrenia
    Shinsuke Koike
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Clin Neurophysiol 122:1533-40. 2011
    ..Age at onset is a major factor for predicting social outcome in schizophrenia. In clinical settings, we need an objective assessment tool for evaluating prefrontal function and social outcome...
  9. ncbi Developmental changes of prefrontal activation in humans: a near-infrared spectroscopy study of preschool children and adults
    Yuki Kawakubo
    Department of Child Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
    PLoS ONE 6:e25944. 2011
    ..Although the developmental change of the frontopolar PFC was independent of gender from childhood to adolescence, in adulthood a gender difference was shown...
  10. ncbi Phonological fluency is uniquely impaired in Japanese-speaking schizophrenia patients: confirmation study
    Motomu Suga
    Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
    Psychiatry Clin Neurosci 65:672-5. 2011
    ....
  11. ncbi A multimodal approach to investigate biomarkers for psychosis in a clinical setting: the integrative neuroimaging studies in schizophrenia targeting for early intervention and prevention (IN-STEP) project
    Shinsuke Koike
    Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Bunkyo ku, Tokyo 113 8655, Japan
    Schizophr Res 143:116-24. 2013
    ..0%, and 35.3% (at 6, 12, and 24months, respectively). Through this research project, we expect to clarify the pathophysiological features around the onset of psychosis and improve the prognosis of psychosis through clinical application...