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Akira Iwanami
Researcher at Showa University
Publications - 115
Citations - 2746
Akira Iwanami is an academic researcher from Showa University. The author has contributed to research in topics: Autism & Attention deficit hyperactivity disorder. The author has an hindex of 25, co-authored 103 publications receiving 2343 citations. Previous affiliations of Akira Iwanami include Aino University & Saitama Medical University.
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Journal ArticleDOI
Executive and prefrontal dysfunction in unipolar depression: a review of neuropsychological and imaging evidence
Mark A. Rogers,Kyoto Kasai,Matsuo Koji,Rinmei Fukuda,Akira Iwanami,Kazuyuki Nakagome,Masato Fukuda,Nobumasa Kato +7 more
TL;DR: The evidence from combined imaging and neuropsychological studies supports the involvement of the ACC, but is less clear in the case of the DLPFC, and the limited number of such studies conducted to date means that conclusions must be tentative.
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Gut microbiota and major depressive disorder: A systematic review and meta-analysis
Kenji Sanada,Shinichiro Nakajima,Shunya Kurokawa,Alberto Barceló-Soler,Daisuke Ikuse,Akihito Hirata,Akira Yoshizawa,Yoshihiro Tomizawa,Montserrat Salas-Valero,Yoshihiro Noda,Masaru Mimura,Akira Iwanami,Taishiro Kishimoto +12 more
TL;DR: The results indicate that several taxa at the family and genus levels, specifically family Prevotellaceae, genus Corprococcus, and Faecalibacterium, were decreased in MDD compared to non-depressed controls in observational studies, and depressive symptoms were improved compared to controls in interventional studies with probiotics.
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Smaller amygdala volume and reduced anterior cingulate gray matter density associated with history of post-traumatic stress disorder.
Mark A. Rogers,Hidenori Yamasue,Osamu Abe,Haruyasu Yamada,Toshiyuki Ohtani,Akira Iwanami,Shigeki Aoki,Nobumasa Kato,Kiyoto Kasai +8 more
TL;DR: Left amygdala volume showed a significant negative correlation with severity of PTSD symptomatology as well as reduced gray matter density in the left anterior cingulate cortex, the first observation of an association between PTSD and amygdala volume.
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Voxel-based diffusion tensor analysis reveals aberrant anterior cingulum integrity in posttraumatic stress disorder due to terrorism
Osamu Abe,Hidenori Yamasue,Kiyoto Kasai,Haruyasu Yamada,Shigeki Aoki,Akira Iwanami,Toshiyuki Ohtani,Yoshitaka Masutani,Nobumasa Kato,Kuni Ohtomo +9 more
TL;DR: Further evidence is demonstrated of abnormalities of both the ACC, a structure that is pivotally involved in attention, emotional regulation, and fear conditioning, and of subjacent white matter in the pathology of PTSD.
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Human brain structural change related to acute single exposure to sarin.
Hidenori Yamasue,Osamu Abe,Kyoto Kasai,Motomu Suga,Akira Iwanami,Haruyasu Yamada,Mamoru Tochigi,Toshiyuki Ohtani,Mark A. Rogers,Mark A. Rogers,Tsukasa Sasaki,Shigeki Aoki,Tadafumi Kato,Nobumasa Kato +13 more
TL;DR: This study aimed to identify persistent morphological changes subsequent to an acute single‐time exposure to sarin, a highly poisonous organophosphate, and the neurobiological basis of long‐lasting somatic and cognitive symptoms in victims exposed to siar.