Shimako Nishiyama

Biographic Data

ID7658262
NAMEShimako Nishiyama
GIVEN NAMESShimako
FAMILY NAMENishiyama
SIGNATURENISHIYAMA S
AFFILIATIONSUniversity of Toyama
VERIFIEDNo
TOTAL WORKS6
TOTAL CITATIONS0
AUTHOR COUNT6
EDITOR COUNT0
FIRST PUBLICATION YEAR2013
LATEST PUBLICATION YEAR2023
H-INDEX0

  • 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

  • Duration Mismatch Negativity Predicts Remission in First-Episode Schizophrenia Patients

    Open AccessSuguru Nakajima, Yuko Higuchi et al.ARTICLEFrontiers in Psychiatry2021

    Objective: Remission in schizophrenia patients is associated with neurocognitive, social, and role functioning during both the early and chronic stages of schizophrenia. It is well-established that the amplitudes of duration mismatch negativity (dMMN) and frequency MMN (fMMN) are reduced in schizophrenia patients. However, the potential link between MMN and remission has not been established. In this study, we investigated the relationship betwee…

  • 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…

  • 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…

  • Gray Matter Changes in Subjects at High Risk for Developing Psychosis and First-Episode Schizophrenia

    Open AccessKazue Nakamura, Tsutomu Takahashi et al.ARTICLEFrontiers in Psychiatry2013

    The present study suggests that alteration of the anterior cingulate gyrus may be associated with development of frank psychosis. Further studies with a larger ARMS subjects would be required to examine the potential role of neuroimaging methods in the prediction of future transition into psychosis