T
Tomiki Sumiyoshi
Researcher at University of Toyama
Publications - 208
Citations - 4956
Tomiki Sumiyoshi is an academic researcher from University of Toyama. The author has contributed to research in topics: Schizophrenia & Cognition. The author has an hindex of 33, co-authored 186 publications receiving 4255 citations. Previous affiliations of Tomiki Sumiyoshi include Vanderbilt University.
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Journal ArticleDOI
Psychosis pathways converge via D2high dopamine receptors.
Philip Seeman,Johannes Schwarz,Jiang Fan Chen,Henry Szechtman,Melissa L. Perreault,G. Stanley McKnight,John C. Roder,Rémi Quirion,Patricia Boksa,Lalit K. Srivastava,Kazuhiko Yanai,David Weinshenker,Tomiki Sumiyoshi +12 more
TL;DR: The evidence suggests that there are multiple pathways that convergetoelevate the D2High state in brain regions and that this elevation may elicit psychosis.
Journal ArticleDOI
Enhancement of Cognitive Performance in Schizophrenia by Addition of Tandospirone to Neuroleptic Treatment
Tomiki Sumiyoshi,Mie Matsui,Shigeru Nohara,Ikiko Yamashita,Masayoshi Kurachi,Chika Sumiyoshi,Karu Jayathilake,Herbert Y. Meltzer +7 more
TL;DR: The results suggest the usefulness of 5-HT(1A) agonists for enhancing some types of cognitive performance and possibly social and work function in patients with schizophrenia.
Journal ArticleDOI
Brief assessment of cognition in schizophrenia: validation of the Japanese version.
Yasuhiro Kaneda,Tomiki Sumiyoshi,Richard S.E. Keefe,Yasuhito Ishimoto,Shusuke Numata,Tetsuro Ohmori +5 more
TL;DR: It is indicated that the BACS‐J is a reliable and practical scale to evaluate cognitive function and a principal components analysis with varimax rotation resulted in a three‐factor solution.
Journal ArticleDOI
Multivariate voxel-based morphometry successfully differentiates schizophrenia patients from healthy controls.
Yasuhiro Kawasaki,Michio Suzuki,Ferath Kherif,Tsutomu Takahashi,Shi-Yu Zhou,Shi-Yu Zhou,Kazue Nakamura,Mie Matsui,Tomiki Sumiyoshi,Hikaru Seto,Masayoshi Kurachi +10 more
TL;DR: The findings suggest that the characteristic distribution of gray matter changes may be of diagnostic value for schizophrenia.
Journal ArticleDOI
Plasma glycine and serine levels in schizophrenia compared to normal controls and major depression: relation to negative symptoms.
Tomiki Sumiyoshi,A. Elif Anil,A. Elif Anil,Dai Jin,Karu Jayathilake,Myung A. Lee,Herbert Y. Meltzer +6 more
TL;DR: The decreases in plasma glycine levels support the evidence for an abnormality in the glutamatergic system in schizophrenia, and provide additional support for efforts to improve negative symptoms by augmentation of antipsychotic drugs with agonists at the glycine site of the NMDA receptor.