Updated on 2026/06/04

Information

 

写真a

 
HIRAKAWA NORIAKI
 
Organization
Kyushu University Hospital Neuro-Psychiatry Assistant Professor
School of Medicine Department of Medicine(Concurrent)
Title
Assistant Professor
External link

Research Areas

  • Life Science / Psychiatry

Degree

  • PhD ( 2019.5 Kyushu University )

Research History

  • Kyushu University 精神科神経科 Assistant Professor 

    2024.4 - Present

Education

  • Kyushu University   医学研究院  

    2014.4 - 2019.5

  • Kyushu University   医学部  

    2001.4 - 2007.3

Papers

  • Volume of the amygdala, hippocampus, Heschl's gyrus, and planum temporale in epileptic psychosis Reviewed International journal

    Hirakawa, N; Oribe, N; Hirano, Y; Togao, O; Ishigami, K; Onitsuka, T; Hirano, S; Nakao, T

    PSYCHIATRY RESEARCH-NEUROIMAGING   354   112081   2025.12   ISSN:0925-4927 eISSN:1872-7506

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Psychiatry Research Neuroimaging  

    Background: Schizophrenia and chronic interictal epileptic psychosis (EPS) are thought to have different underlying pathophysiological mechanisms. We aimed to investigate the neural basis of EPS. Methods: T1-weighted images were analyzed in 16 patients with EPS, 16 strictly matched patients with epilepsy only (EP), and 16 healthy control subjects (HS). We conducted structural magnetic resonance imaging analyses using a manual drawing method of several regions of interest (ROIs): the amygdala, hippocampus, Heschl's gyrus, and planum temporale. Results: Results revealed that both the EP and EPS groups exhibited significantly lower hippocampal volumes than the HS group (p = 0.008). There were no significant differences in the volume of any ROI between the EP and EPS groups. Conclusions: Our ROI analyses indicated that the hippocampus is affected by epilepsy but the amygdala, hippocampus, Heschl's gyrus, and planum temporale may not be crucial for generating EPS.

    DOI: 10.1016/j.pscychresns.2025.112081

    Web of Science

    Scopus

    PubMed

  • 私のカルテから うつ病の疑いで紹介を受け,入院後に判明したウェルニッケ脳症の一例

    平河 則明

    九州神経精神医学   70 ( 3-4 )   123 - 126   2025.8   ISSN:0023-6144

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    Language:Japanese   Publisher:九州精神神経学会  

    うつ病の疑いで紹介入院となった40歳代男性患者が入院後にウェルニッケ脳症であることが判明した症例を報告した。症例は2年前に胃がんが判明し、全摘出していた。1年前に肝臓への転移が判明、化学療法を開始した。その後、食欲が落ち、活気がない様子が続き、身体的予後が厳しいことによるうつ病を視野に入れて内科主治医から紹介となった。本人は抑うつ感は否定し、いったん診察を終えたが、半年ほど後に主訴がふらつきで再診となった。転んで顔面を打ったとの報告があり、仕事も休職が続いていた。うつ病疑いとアルコール使用障害疑いの診断で、精神科病棟に任意入院となった。ビタミン欠乏を前提として治療を進めていたところ、ビタミンB1が低値との報告があり、意識障害・運動失調をあわせてウェルニッケ脳症の特徴が揃ったと考えられた。ビタミン補充を行った結果、神経所見は改善したが、完全な回復には至らなかった。

  • Neuroanatomical substrate of chronic psychosis in epilepsy: an MRI study. Reviewed

    Hirakawa N, Kuga H, Hirano Y, Sato J, Oribe N, Nakamura I, Hirano S, Ueno T, Oda Y, Togao O, Hiwatashi A, Honda H, Kanba S, Onitsuka T

    Brain Imaging Behav.   14   1382 - 1387   2020

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    Authorship:Lead author  

  • Right hemisphere pitch-mismatch negativity reduction in patients with major depression: An MEG study. Reviewed

    Hirakawa N, Hirano Y, Nakamura I, Hirano S, Sato J, Oribe N, Ueno T, Kanba S, Onitsuka T

    J Affect Disord.   215   225 - 229   2017

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    Authorship:Lead author  

Professional Memberships

  • 日本精神神経学会

    2025.4 - Present

  • 日本気象学会

    2025.4 - Present

Clinician qualification

  • Preceptor

    The Japanese Society of Psychiatry and Neurology(JSPN)

  • Specialist

    The Japanese Society of Psychiatry and Neurology(JSPN)

Year of medical license acquisition

  • 2007