Shun Igarashi

ORCID: 0009-0009-3727-9985
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About
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Research Areas
  • Electroconvulsive Therapy Studies
  • Magneto-Optical Properties and Applications
  • Schizophrenia research and treatment
  • Transcranial Magnetic Stimulation Studies
  • Photonic and Optical Devices
  • Optical Network Technologies
  • Treatment of Major Depression
  • Functional Brain Connectivity Studies
  • Advanced Fiber Optic Sensors
  • Hallucinations in medical conditions
  • Non-Destructive Testing Techniques
  • Electromagnetic Compatibility and Measurements
  • Bipolar Disorder and Treatment
  • Electromagnetic Compatibility and Noise Suppression
  • Power Line Communications and Noise
  • Nuclear Materials and Properties
  • Tryptophan and brain disorders
  • Long-Term Effects of COVID-19
  • Advanced Fiber Laser Technologies
  • Stroke Rehabilitation and Recovery
  • Pain Management and Treatment
  • Hydrogen embrittlement and corrosion behaviors in metals

National Center of Neurology and Psychiatry
2022-2025

Kyorin University
2022-2025

Jikei University School of Medicine
2024

National Institute of Mental Health
2022

Sumitomo Electric Industries (United States)
2022

Shibaura Institute of Technology
2010-2011

Ibaraki University
2007

Abstract Background Antipsychotics are used in treatment of schizophrenia. Although antipsychotic monotherapy is recommended most guidelines, the prescription rate polypharmacy still high, and rates antipsychotics other concomitant psychotropics different among each institution. detailed causes for these differences not well known, one reasons polypharmacy, including may be associated with severity schizophrenia resistant (TRS). With regard to TRS, institutions a low TRS examination was...

10.1093/ijnp/pyae059.282 article EN cc-by-nc The International Journal of Neuropsychopharmacology 2025-02-01

The rate of antipsychotic polypharmacy is high. One risk factor for may be the severity schizophrenia, including treatment-resistant schizophrenia (TRS). We hypothesized that institutions are able to prescribe clozapine present differences in pharmacological treatment even before TRS diagnosed. A total 8155 patients with were divided into clozapine-available institution (CAI) group and clozapine-unavailable (CUI) group. psychotropic prescription rates at discharge compared between two...

10.1093/ijnp/pyaf011 article EN cc-by The International Journal of Neuropsychopharmacology 2025-03-28

Aim We investigated the association of electroconvulsive therapy (ECT) with anxiolytic and sleep medication use in patients major depressive disorder (MDD) schizophrenia (SZ). Methods This nationwide observational study analyzed data from 3483 MDD inpatients 6663 SZ inpatients. Patients were classified into those who underwent ECT during hospitalization did not. A propensity score‐matching method was performed to adjust for preadmission characteristics clinical information, which expected...

10.1111/pcn.13489 article EN Psychiatry and Clinical Neurosciences 2022-10-10

An optical isolator with a Si guiding layer that makes use of nonreciprocal phase shift is discussed. The sputter-deposited on garnet substrate. magnetooptic waveguide in the has an air/Si/magnetic-garnet structure. can be operated unidirectional magnetic field owing to interferometer distinct structures. Various structures will proposed for operation.

10.1143/jjap.49.058002 article EN Japanese Journal of Applied Physics 2010-05-01

The clinical efficacy of repetitive transcranial magnetic stimulation (rTMS) for treatment-resistant depression (TRD) in Japan has not been adequately investigated. Furthermore, the relationship between stimulation-site pain and antidepressant effects rTMS thoroughly examined. Therefore, this study aimed to clarify (1) real-world safety TRD (2) improvement depressive symptoms.

10.1159/000538971 article EN Neuropsychobiology 2024-06-18

<title>Abstract</title> <bold>Background:</bold> Although antidepressant monotherapy is recommended for patients with major depressive disorder (MDD), they often do not respond to it, necessitating alternatives such as electroconvulsive therapy (ECT). However, maintenance pharmacotherapy after ECT has remained unestablished. With the aim of exploring real-world post-ECT pharmacotherapy, we conducted a large-scale retrospective observational study investigate prescription patterns at...

10.21203/rs.3.rs-4814931/v1 preprint EN Research Square (Research Square) 2024-09-05

The objective of this study was to reveal the effectiveness repetitive transcranial magnetic stimulation (rTMS) for Japanese patients with treatment-resistant depression (TRD) in clinical practice, based on real-world data from a nationwide multicenter observational Japan. Clinical TRD treated rTMS (NeuroStar TMS treatment system) under public insurance coverage were retrospectively collected 21 institutes between June 2019 and December 2023. Depression severity assessed by 17-item Hamilton...

10.1016/j.psychres.2024.116263 article EN cc-by Psychiatry Research 2024-11-10

In late years, fuel cell vehicles (FCV) using hydrogen as the have been attracting attention in terms of reduction or CO_2 emissions. FCV, gas is stored tanks and are covered with carbon reinforced plastic. that lined aluminum. However, it known some aluminum alloys embrittlement (HE) occurs. this study, sheet specimens a 7075 alloy subjected to three heat-treatments, under-aged (UA), peak-aged (PA) over-aged(OA), were tensile-tested moist air well dry nitrogen by slow-strain-rate...

10.1299/jsmeibaraki.2007.131 article EN The Proceedings of Ibaraki District Conference 2007-01-01

This paper examines the possibility of an electromagnetic interference (EMI) caused by unintentional radiated emissions from unshielded twisted pair (UTP) cable in sub-6GHz band 5G. First, it is experimentally and numerically confirmed that a UTP with twist pitch 20mm sheath relative permittivity 2.9 radiates above 5.7GHz. It also clarified are attributable to structure. In addition, usefulness two equations, derived developing radiating cables, easily calculate radiation angle solve EMI...

10.1587/comex.2022xbl0101 article EN IEICE Communications Express 2022-08-08

Abstract A nonreciprocal phase shift occurs in TM modes that travel magneto‐optic waveguides which magnetization is aligned transverse to the light propagation direction film plane. The large obtained when a waveguide comprises guiding layer with high‐refractive‐index material. Si by depositing on magnetic garnet layer. An optical isolator employing described has laser diode integrated can be developed connecting waveguide, concept of photonics (© 2011 WILEY‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)

10.1002/pssc.201000308 article EN Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics 2011-02-01
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