Nishimura Masahiko

写真a

Title

Instructor

Researcher Number(JSPS Kakenhi)

60597889
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Graduate School of Medicine   Instructor  

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University 【 display / non-display 】

  • 　
    -
    1995.03

    Nagoya University   Faculty of Biomedical Technology   Graduated

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External Career 【 display / non-display 】

  • 2011.04
    　
    　

     

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Research Interests 【 display / non-display 】

  • Brain science

  • Rehabilitation

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Published Papers 【 display / non-display 】

  • Factors Leading to Improved Gait Function in Patients with Subacute or Chronic Central Nervous System Impairments Who Receive Functional Training with the Robot Suit Hybrid Assistive Limb.

    Nishimura M, Kobayashi S, Kinjo Y, Hokama Y, Sugawara K, Tsuchida Y, Tominaga D, Ishiuchi S

    Neurologia medico-chirurgica ( 一般社団法人 日本脳神経外科学会 )  58 ( 1 ) 39 - 48   2018.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    <p>The factors that lead to the improvement of gait function in patients with diseases of the central nervous system (CNS) who use a hybrid assistive limb (HAL) are not yet fully understood. The purpose of the present study was to analyze these factors to determine the prognosis of the patients' gait function. Patients whose CNS disease was within 180 days since onset were designated as the subacute-phase patients, and patients whose disease onset had occurred more than 180 days previously were designated as chronic-phase patients. Fifteen subacute-phase patients and 15 chronic-phase patients were given HAL training. The study analyzed how post-training walking independence in these patients was affected by the following factors: age, disease, lesion area, lower limb function, balance, period until the start of training, number of training sessions, additional rehabilitation, higher-order cognitive dysfunction, HAL model, and the use of a non-weight-bearing walking-aid. In subacute-phase patients, walking independence was related to lower limb function (<i>r<sub>s</sub></i> = 0.35). In chronic-phase patients, there was a statistically significant correlation between post-training walking independence and balance (<i>r<sub>s</sub></i> = 0.78). In addition, in patients with a severe motor dysfunction that was accompanied by inattention and global cognitive dysfunction, little improvement occurred, even with double-leg model training, because they had difficulty wearing the device. The results demonstrated that the factors that improved walking independence post HAL training differed between patients with subacute- and chronic-stage CNS diseases. The findings may serve as valuable information for future HAL training of patients with CNS diseases.</p>

  • Cerebellar Contribution to Pattern Separation of Human Hippocampal Memory Circuits.

    Shiroma A, Nishimura M, Nagamine H, Miyagi T, Hokama Y, Watanabe T, Murayama S, Tsutsui M, Tominaga D, Ishiuchi S

    Cerebellum (London, England) ( SPRINGER )  15 ( 6 ) 645 - 662   2016.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    The cerebellum is a crucial structure for cognitive function as well as motor control. Benign brain tumors such as schwannomas, meningiomas, and epidermoids tend to occur in the cerebellopontine angle cisterns and may cause compression of the posterior lateral cerebellum near the superior posterior fissure, where the eloquent area for cognitive function was recently identified. The present study examined cognitive impairment in patients with benign cerebellar tumors before and after surgical intervention in order to clarify the functional implications of this region in humans. Patients with cerebellar tumors showed deficits in psychomotor speed and working memory compared with healthy controls. Moreover, these impairments were more pronounced in patients with right cerebellar tumors. Functional magnetic resonance imaging during performance of a lure task also demonstrated that cerebellar tumors affected pattern separation or the ability to distinguish similar experiences of episodic memory or events with discrete, non-overlapping representations, which is one of the important cognitive functions related to the hippocampus. The present findings indicate that compression of the human posterior lateral cerebellum affects hippocampal memory function.

  • 慢性期中枢神経障害患者への経頭蓋直流電気刺激による治療介入が筋力と脳活動に及ぼす効果―シングルケースによる検討―

    西村正彦, 渡邉孝, 石内勝吾

    沖縄県作業療法研究   ( 7 ) 2‐8   2015.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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Other Papers 【 display / non-display 】

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Presentations 【 display / non-display 】

  • 脳神経外科手術のための物理変形性バーチャルリアリティ・シミュレーション・システムの開発と臨床経験

    宮城智央, 國仲倫史, 金城雄生, 小林繁貴, 長嶺英樹, 外間洋平, 上薫, 宇杉竜一, 片桐千秋, 西村正彦, 菅原健一, 高木博, 石内勝吾

    日本VR医学会学術大会(CD-ROM)  2019.08  -  2019.08 

  • 前頭側頭型認知症とうつ病の合併が疑われ,アパシー及び抑うつ気分にmECTが有効だった症例―SPECT及びDefault Mode Network所見の変化から―

    山城千絵, 外間宏人, 松隈憲吾, 西村正彦, 西村正彦, 石内勝吾, 與儀彰, 近藤毅

    九州精神神経学会・九州精神医療学会プログラム・抄録集  2018  -  2018 

  • うつ病に前頭側頭型認知症を合併しmECTが抑うつ及びアパシーの両方に有効だった1例

    外間宏人, 黒木恭子, 松隈憲吾, 近藤毅, 西村正彦, 石内勝吾, 與儀彰

    Dementia Japan  2017.10  -  2017.10 

  • HAL単関節モデルトレーニングによる上肢機能改善に関連する要因

    西村正彦, 小林繁貴, 外間洋平, 菅原健一, 石内勝吾

    日本作業療法学会抄録集(CD-ROM)  2017  -  2017 

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