Yoichiro Takayanagi

Biographic Data

ID7953974
NAMEYoichiro Takayanagi
GIVEN NAMESYoichiro
FAMILY NAMETakayanagi
SIGNATURETAKAYANAGI Y
AFFILIATIONSUniversity of Toyama
VERIFIEDNo
TOTAL WORKS9
TOTAL CITATIONS0
AUTHOR COUNT9
EDITOR COUNT0
FIRST PUBLICATION YEAR2018
LATEST PUBLICATION YEAR2024
H-INDEX0

  • Increased brain gyrification and cortical thinning in winter-born patients with schizophrenia spectrum

    Open AccessMisako Torigoe, Tsutomu Takahashi et al.ARTICLEFrontiers in Psychiatry2024

    The present whole-brain surface-based analysis demonstrated that brain morphological characteristics reported in the schizophrenia spectrum were more pronounced in winter-born patients than in summer-born patients, suggesting the contribution of early neurodevelopmental factors associated with birth seasons to the pathophysiology of the schizophrenia spectrum

  • Anatomical variations in the insular cortex in individuals at a clinical high-risk state for psychosis and patients with schizophrenia

    Open AccessTsutomu Takahashi, Daiki Sasabayashi et al.ARTICLEFrontiers in Psychiatry2023

    The features of the insular gross anatomy that were shared in the ARMS and schizophrenia groups may reflect a vulnerability to psychosis that may be attributed to anomalies in the early stages of neurodevelopment. However, the contribution of the insular gross anatomy to the clinical characteristics of schizophrenia may differ according to illness stages

  • Gross anatomical features of the insular cortex in schizophrenia and schizotypal personality disorder: Potential relationships with vulnerability, illness stages, and clinical subtypes

    Open AccessTsutomu Takahashi, Daiki Sasabayashi et al.ARTICLEFrontiers in Psychiatry2022

    These findings suggest that schizophrenia and SPD patients may share an altered insular gross morphology as a vulnerability factor associated with early neurodevelopmental anomalies, which may also contribute to positive symptomatology in the early illness stages and clinical subtypes of schizophrenia

  • Different Heschl’s Gyrus Duplication Patterns in Deficit and Non-deficit Subtypes of Schizophrenia

    Open AccessTsutomu Takahashi, Daiki Sasabayashi et al.ARTICLEFrontiers in Psychiatry2022

    Deficit syndrome schizophrenia is a characteristic subtype defined by persistent negative symptoms and poor functional outcomes; however, the biological mechanisms underlying this specific subtype have not yet been elucidated in detail. The present magnetic resonance imaging study examined the prevalence of duplicated Heschl's gyrus (HG), a potential neurodevelopmental marker, in schizophrenia patients with ( N = 38) and without ( N = 37) the def…

  • Increased brain gyrification and subsequent relapse in patients with first-episode schizophrenia

    Open AccessDaiki Sasabayashi, Yoichiro Takayanagi et al.ARTICLEFrontiers in Psychiatry2022

    Most schizophrenia patients experience psychotic relapses, which may compromise long-term outcome. However, it is difficult to objectively assess the actual risk of relapse for each patient as the biological changes underlying relapse remain unknown. The present study used magnetic resonance imaging (MRI) to investigate the relationship between brain gyrification pattern and subsequent relapse in patients with first-episode schizophrenia. The sub…

  • Reduced Hippocampal Subfield Volume in Schizophrenia and Clinical High-Risk State for Psychosis

    Open AccessDaiki Sasabayashi, Ryo Yoshimura et al.ARTICLEFrontiers in Psychiatry2021

    Magnetic resonance imaging (MRI) studies in schizophrenia demonstrated volume reduction in hippocampal subfields divided on the basis of specific cytoarchitecture and function. However, it remains unclear whether this abnormality exists prior to the onset of psychosis and differs across illness stages. MRI (3 T) scans were obtained from 77 patients with schizophrenia, including 24 recent-onset and 40 chronic patients, 51 individuals with an at-ri…

  • Gray Matter Changes in the Insular Cortex During the Course of the Schizophrenia Spectrum

    Open AccessTsutomu Takahashi, Mikio Kido et al.ARTICLEFrontiers in Psychiatry2020

    Progressive gray matter reductions in the insular cortex have been reported in the early phases of schizophrenia (Sz); however, the trajectory of these reductions during the course of the illness currently remains unclear. Furthermore, it has not yet been established whether patients with schizotypal (SzTypal) features exhibit progressive changes in the insular cortex. This follow-up magnetic resonance imaging study examined volume changes in the…

  • Structural MRI Study of the Planum Temporale in Individuals With an At-Risk Mental State Using Labeled Cortical Distance Mapping

    Open AccessYoichiro Takayanagi, Sue Kulason et al.ARTICLEFrontiers in Psychiatry2020

    Background: Recent studies have demonstrated brain structural changes that predate or accompany the onset of frank psychosis, such as schizophrenia, among individuals with an at-risk mental state (ARMS). The planum temporale (PT) is a brain region involved in language processing. In schizophrenia patients, gray matter volume reduction and lack of normal asymmetry (left > right) of PT have repeatedly been reported. Some studies showed progressive …

  • Pituitary Volume and Socio-Cognitive Functions in Individuals at Risk of Psychosis and Patients With Schizophrenia

    Open AccessTsutomu Takahashi, Yuko Higuchi et al.ARTICLEFrontiers in Psychiatry2018

    Objectives: Increased pituitary volume, which probably reflects hypothalamic-pituitary-adrenal (HPA) hyperactivity, has been reported in patients with schizophrenia and individuals at risk of psychosis. On the basis of potential role of abnormal HPA axis function on cognitive impairments in psychosis, we aimed to examine possible relations between the pituitary volume and socio-cognitive impairments in these subjects. Methods: This magnetic reson…