Graduate School of Medical and Dental Sciences Biological Functions and Medical Control Sensory and Integrative Medicine Assistant Professor
Graduate School of Medical and Dental Sciences Biological Functions and Medical Control Sensory and Integrative Medicine Assistant Professor
Degree
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博士(医学) ( 2010.3 新潟大学 )
Research Areas
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Life Science / Otorhinolaryngology / otology, equilibrium, auditory cortex
Research History
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Niigata University Graduate School of Medical and Dental Sciences Biological Functions and Medical Control Sensory and Integrative Medicine Assistant Professor
2017.7
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Niigata University University Medical and Dental Hospital Otolaryngology, Head and Neck Surgery Assistant Professor
2017.1 - 2017.6
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Niigata University University Medical and Dental Hospital Otolaryngology, Head and Neck Surgery Specially Appointed Assistant Professor
2016.2 - 2016.12
Research Projects
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Establishment of a novel strategy in treatment for intractable chronic dizziness using 3D sound sensory substitution technology
Grant number:20H04548
2020.4 - 2025.3
System name:Grants-in-Aid for Scientific Research
Research category:Grant-in-Aid for Scientific Research (B)
Awarding organization:Japan Society for the Promotion of Science
Grant amount:\17680000 ( Direct Cost: \13600000 、 Indirect Cost:\4080000 )
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PPPDに対する聴覚伝導路を用いた感覚代行トレーニングの有用性の検討
Grant number:20K09751
2020.4 - 2024.3
System name:科学研究費助成事業 基盤研究(C)
Research category:基盤研究(C)
Awarding organization:日本学術振興会
大島 伸介, 堀井 新, 和田森 直, 野々村 頼子
Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )
本研究の目的は、前庭覚、視覚、体性感覚に加えて聴覚刺激を用いた感覚代行を第4の平衡情報として入力することにより、視覚入力、体性感覚入力の重みづけ、過剰反応をリセットし、PPPDの病態に即した新たな治療法を構築することである。
感覚代行とは感覚情報を本来とは別の感覚系で中枢へ伝達することで、平衡情報の感覚代行では、腰部の振動刺激、舌の電気刺激や下顎の振動刺激を用いた研究がすでに報告されている。われわれは共同研究者である長岡技術科学大学工学部の和田森らとともに、聴覚刺激を用いてセンサーをヘッドホンに組み込んだデバイスの開発を行っている。まず新規平衡センサー(V-box)を開発した。V-boxは9軸のモーションセンサーを搭載し、ヘッドホンに固定することで頭部の角速度を測定する。V-boxで得られたデータはタブレットへ転送して平衡情報を音刺激に変換し、ヘッドホンから音刺激として出力する。前に傾くほど低音、後ろは高音、左右に傾くほどその方向からの音量が大きくなる。V-boxの感知角度に閾値を設定し、閾値以下の頭部偏位が少ないと無音、閾値以上に偏位するとヘッドホンから傾きに応じて音が出るように設定した。
この感覚代行デバイスを用いて、感覚代行の有無による視覚依存性、体性感覚依存性の変化を検討した。対象はめまい症状のない健常者6名、重心動揺計に乗りながらヘッドホンの音に応じて頭部偏位を戻して無音領域を保つように平衡維持させた。感覚代行の無音領域を3°, 1.5°に設定し、それぞれの重心動揺検査で視覚依存性を表す速度ロンベルグ率、体性感覚依存性を表す閉眼ラバー比を比較検討した。速度ロンベルグ率、閉眼ラバー比ともに3°、1.5°の間に有意差を認めなかったが、1.5°、つまり無音領域を狭くして聴覚刺激がより多くなると、ともに1.0に近づき、視覚依存性、体性感覚依存性が減少する傾向にあった。 -
Identification and plasticity of the vestibular area of the mouse cerebral cortex using flavoprotein fluorescence imaging
Grant number:17K11319
2017.4 - 2021.3
System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Research category:Grant-in-Aid for Scientific Research (C)
Awarding organization:Japan Society for the Promotion of Science
OHSHIMA SHINSUKE
Grant amount:\4810000 ( Direct Cost: \3700000 、 Indirect Cost:\1110000 )
Caloric stimulation was applied to C57BL / 6 mice, but the reproducibility of nystagmus findings was not high. Therefore, although there is no report on mice, we tried galvanic stimulation, which is a proven vestibular stimulation method in other animal species. The response of the cerebral cortex changed according to the stimulation frequency, and it was found that the vestibular area, which seems to be PIVC, responded to low-frequency stimulation, and the auditory cortex responded to higher-frequency stimulation. Next, a similar experiment was performed on GCaMP6 mice that can be imaged at several times the intensity of flavoprotein fluorescence. Similar to C57BL / 6 mice, the vestibular area, which seems to be PIVC, tended to respond to low-frequency stimulation, and the auditory cortex tended to respond to high-frequency stimulation, and the response intensity of imaging increased.
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Grant number:25861536
2013.4 - 2017.3
System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
Research category:Grant-in-Aid for Young Scientists (B)
Awarding organization:Japan Society for the Promotion of Science
OHSHIMA Shinsuke
Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )
In patients with sensorineural hearing loss "I hear sound but I do not understand the words", we feel the limit of traditional hearing aid treatment. We focused on the possibility of dichotic listening system for improving speech intelligibility and a new auditory rehabilitation that associates shape and sound, ie visual and auditory sense. Mouse cerebral auditory cortex responses were observed using flavoprotein autofluorescence imaging. Data collection of dichotic listening was technically difficult. After the mouse was exposed by associating visual and auditory stimuli, cerebral auditory cortex responses were found only by looking at the shape without sound. I think that these results can contribute to further new auditory rehabilitation using sensory stimulation other than hearing.