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August 18, 2017

女性は男性よりも活発な脳を有している。Science dailyより

Women have more active brains than men


Largest functional brain imaging study to date identifies specific brain differences between women and men, according to a new report in the Journal of Alzheimer's Disease




In the largest functional brain imaging study to date, the Amen Clinics (Newport Beach, CA) compared 46,034 brain SPECT (single photon emission computed tomography) imaging studies provided by nine clinics, quantifying differences between the brains of men and women. The study is published in the Journal of Alzheimer's Disease.


single photon emission computed tomography (spect) 単一光子放射断層撮影

Lead author, psychiatrist Daniel G. Amen, MD, founder of Amen Clinics, Inc., commented, "This is a very important study to help understand gender-based brain differences. The quantifiable differences we identified between men and women are important for understanding gender-based risk for brain disorders such as Alzheimer's disease. Using functional neuroimaging tools, such as SPECT, are essential to developing precision medicine brain treatments in the future."


The brains of women in the study were significantly more active in many more areas of the brain than men, especially in the prefrontal cortex, involved with focus and impulse control, and the limbic or emotional areas of the brain, involved with mood and anxiety. The visual and coordination centers of the brain were more active in men. SPECT can measure blood perfusion in the brain. Images acquired from subjects at rest or while performing various cognitive tasks will show different blood flow in specific brain regions.


prefrontal cortex 前頭前皮質
impulse control 衝動制御
blood perfusion 血液灌流
cognitive tasks 認知課題

Subjects included 119 healthy volunteers and 26,683 patients with a variety of psychiatric conditions such as brain trauma, bipolar disorders, mood disorders, schizophrenia/psychotic disorders, and attention deficit hyperactivity disorder (ADHD). A total of 128 brain regions were analyzed for subjects at baseline and while performing a concentration task.

被験者には、119人の健康なボランティアと、脳外傷、双極性障害、気分障害、統合失調症障害/精神病性障害、注意欠如・多動性障害 (ADHD). などの様々な精神症状の患者26,683人が含まれていた。ベースライン時および集中作業中の被験者合計128の脳領域が分析された。

brain trauma 脳外傷
bipolar disorders 双極性障害
schizophrenic disorder 統合失調症障害
psychotic disorders 精神病性障害
attention deficit hyperactivity disorder (ADHD). 注意欠如・多動性障害 (ADHD). 

Understanding these differences is important because brain disorders affect men and women differently.Women have significantly higher rates of Alzheimer's disease, depression, which is itself is a risk factor for Alzheimer's disease, and anxiety disorders, while men have higher rates of (ADHD), conduct-related problems, and incarceration (by 1,400%).

これらの違いを理解することは重要で、なぜなら、脳障害は男性と女性に異なる影響を与えます。女性は、アルツハイマー病、アルツハイマー病因子を含むうつ病および不安障害の発病率が有意に高くて、一方、男性は、注意欠如・多動性障害 (ADHD).  行動関連の病気、および嵌頓ヘルニア(1,400%まで).の発病率が高いです。

conduct-related problems 行動関連の病気

Editor-in-Chief of the Journal of Alzheimer's Disease and Dean of the College of Sciences at The University of Texas at San Antonio, Dr. George Perry said, "Precisely defining the physiological and structural basis of gender differences in brain function will illuminate Alzheimer's disease and understanding our partners."


The study findings of increased prefrontal cortex blood flow in women compared to men may explain why women tend to exhibit greater strengths in the areas of empathy, intuition, collaboration, self-control, and appropriate concern. The study also found increased blood flow in limbic areas of the brains of women, which may also partially explain why women are more vulnerable to anxiety, depression, insomnia, and eating disorders.


limbic areas 大脳辺縁系の領域

the Amen Clinicsを調べていたらみつけたサイトです。

ダニエル・エイメン(Daniel Gregory Amen、1954年 - )[1]は、アメリカの精神科医で[2]、脳障害(英語版)の専門家であり[3]エイメン・クリニック(英語版)の所長であり[4]、ニューヨーク・タイムズ・ベストセラーの作家である[5]。

エイメン・クリニックは注意欠陥・多動性障害 (ADHD) や他の障害の患者のための医療を提供している。そこではエイメンによる実験として、彼の主張するこれらの障害の下位分類を同定する診断ツールとして単一光子放射断層撮影 (SPECT) が用いられている[6]。しかし、エイメンによる精神医学と神経学の診断を補助するSPECTスキャンの使用は、立証されていない主張に基づいており広く批判されている。









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