Faculty Profiles - OKAMURA Jun-ya

Papers - OKAMURA Jun-ya

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Ting Wang, 岡村純也, 王鋼 . 側頭連合野細胞活動を用いた機械学習による物体像分類 . 電気学会論文誌Ｃ145 ( 5 ) 514 - 519 2025.5側頭連合野細胞活動を用いた機械学習による物体像分類Reviewed International coauthorship

Hsiao Wang Ridey, Okamura Jun-ya, Wang Gang . Change in Event-Related Potential accompanying View-invariant Object Discrimination Learning . IEEJ Transactions on Electronics, Information and Systems142 ( 5 ) 522 - 529 2022.5Change in Event-Related Potential accompanying View-invariant Object Discrimination Learning

Language：Japanese Publisher：The Institute of Electrical Engineers of Japan

<p>To understand the underlying neuronal representation for object recognition, we designed this study to investigate the changes in N1, the first negative event-related potential component, accompanied by object discrimination learning. Subjects were asked to train themselves to recognize novel computer-made objects by performing an object discrimination task, in which an object had to be discriminated from others regardless of the change in viewing angle. Such object discrimination did not cause any significant change in either the averaged N1 amplitude or the averaged amplitude delay over the subjects. However, the dipole source analysis for N1 found statistically significant displacement of estimated dipole location caused by object discrimination training in the right hemisphere. The source obtained after training located significantly laterally than that obtained before training. The finding demonstrates the difference in neuronal representations of the experienced objects before and after view-invariant object discrimination learning, and suggests the different neuronal representations for object recognition with novel objects and familiar objects. </p>

DOI： 10.1541/ieejeiss.142.522

Okamura J.Y., Wang, R.H., Kawano K., Wang G. . Differences in the neuronal correlation between the central and peripheral vision in the cat early visual cortex . NeuroReport32 ( 10 ) 899 - 906 2021.7

Wang R.H., Dai L., Okamura J.Y., Fuchida T., Wang G. . Object discrimination performance and dynamics evaluated by inferotemporal cell population activity . IBRO Neuroscience Reports10 171 - 177 2021.6

山田陽介, 岡村純也, 王鋼 . 下側頭葉皮質における興奮性細胞及び抑制性細胞の三次元物体認識への関わり . 電子情報通信学会技術研究報告(MEとバイオサイバネティックス)120 ( 349 ) 7 - 10 2021.1下側頭葉皮質における興奮性細胞及び抑制性細胞の三次元物体認識への関わり

Language：Japanese Publisher：(一社)電子情報通信学会

視覚的物体認識において重要な領域である下側頭葉皮質は,細胞構築学的に前半部のTE野と後半部のTEO野に分けられる.本研究では,物体認識に関わる神経回路を明らかにするため,神経細胞を活動電位の持続時間から興奮性と抑制性に分類し,三次元物体認識への関わりを調べた.分散,Sparsenessを用いて物体の異なる観察角度像に対する応答のバラツキを調べた結果,応答時間の後半において,TE野の方がTEO野よりも有意に小さかった.最適の応答を示した物体の異なる観察角度像に対する応答と,類似した異なる物体に対する応答の差は,TE野の興奮性神経細胞において有意であった.本研究の結果から,興奮性神経細胞が観察角度許容性を示し,抑制性神経細胞は類似した他の物体との差別化に関わることが考えられた.(著者抄録)

Lulin Dai, Jun-ya Okamura, Gang Wang . Dynamics of stimulus selectivity in inferotemporal neurons . 9 93 - 99 2020.5Dynamics of stimulus selectivity in inferotemporal neuronsReviewed

Jun-ya Okamura, Yusuke Yamamoto, Lulin Dai, Yoshihiro Uto, Yousuke Yamada, Gang Wang . Analysis of representations of 3-dimensional objects in the cell populations in the temporal association area using machine learning . IFMBE Proceedings, The 11th Asian Pacific Conference on Medical and Biological Engineering82 181 - 187 2020.5Analysis of representations of 3-dimensional objects in the cell populations in the temporal association area using machine learningReviewed

Jun-ya Okamura, Jin Oshima, Reona Yamaguchi, Wakayo Yamashita, Gang Wang . An intrinsic algorithm for viewing angle tolerance of object discrimination in human subjects . Canadian Journal of Experimental Psychology74 ( 1 ) 73 - 82 2020.3An intrinsic algorithm for viewing angle tolerance of object discrimination in human subjectsReviewed

Yoshihiro UTO, Yusuke YAMAMOTO, Jun-ya OKAMURA, Yousuke YAMADA, Lulin DAI, Gang WANG . Object representation in inferotemporal cortex revealed by neuronal activity-trained neural network . IEICE Technical Report119 ( 391 ) 63 - 67 2020.1Object representation in inferotemporal cortex revealed by neuronal activity-trained neural network

Jun-ya Okamura, Koki Uemura, Shintaro Saruwatari, Gang Wang . Difference in the generalization of response tolerance across views between the anterior and posterior part of the inferotemporal cortex . European Journal of Neuroscience48 ( 12 ) 3552 - 3566 2018.12Difference in the generalization of response tolerance across views between the anterior and posterior part of the inferotemporal cortexReviewed

福留啓太，薗田崇弘，岡村純也，王鋼 . 早期視覚野における局所電場電位の位相同期とその時間経過 . 電子情報通信学会技術研究報告116 ( 435 ) 31 - 34 2017.1早期視覚野における局所電場電位の位相同期とその時間経過

Chunzhen Zhao, Ryosuke Hata, Jun-ya Okamura, Gang Wang . Differences in spatial and temporal frequency interactions between the central and peripheral cortical areas in cat area 18 . European Journal of Neuroscience44 ( 8 ) 2635 - 2645 2016.10Differences in spatial and temporal frequency interactions between the central and peripheral cortical areas in cat area 18Reviewed

山口玲欧奈, 岡村純也, 本田寿成, 大島仁, 猿渡真太郎, 王鋼 . 連合学習を経験した三次元物体の観察角度像に対する側頭葉下部皮質神経細胞集団の応答 . 電気学会論文誌C136 ( 9 ) 1254 - 1260 2016.9連合学習を経験した三次元物体の観察角度像に対する側頭葉下部皮質神経細胞集団の応答Reviewed

Reona Yamaguchi, Jun-ya Okamura, Gang Wang . Dynamics of population coding for object views following object discrimination training . Neuroscience330 109 - 120 2016.8Dynamics of population coding for object views following object discrimination trainingReviewed

岡村純也, 薗田崇弘, 内田晃平, 福留啓太, 王鋼 . 視覚刺激の周辺修飾における視覚野の情報の流れの解析 . 生体医工学53 ( 5 ) 270 - 275 2015.12視覚刺激の周辺修飾における視覚野の情報の流れの解析Reviewed

Megumi Niina, Jun-ya Okamura, Gang Wang . Electrophysiological evidence for separation between human face and non-face object processing only in the right hemisphere . International Journal of Psychophysiology98 ( 1 ) 119 - 127 2015.7Electrophysiological evidence for separation between human face and non-face object processing only in the right hemisphereReviewed

山口玲欧奈，岡村純也，本田寿成，吉満美沙希，猿渡真太郎，大島仁，王鋼 . 側頭葉下部皮質における興奮性神経細胞及び抑制性神経細胞の刺激選択性 . 電子情報通信学会技術研究報告114 ( 408 ) 39 - 42 2015.1側頭葉下部皮質における興奮性神経細胞及び抑制性神経細胞の刺激選択性Reviewed

猿渡真太郎，岡村純也，山口玲欧奈，大島仁，吉満美沙希，王鋼 . 三次元物体に対する側頭葉下部皮質後半部の神経細胞集団の応答 . 電子情報通信学会技術研究報告114 ( 408 ) 43 - 46 2015.1三次元物体に対する側頭葉下部皮質後半部の神経細胞集団の応答Reviewed

岡村純也，里中俊太，永江恒大，秦良佑，田中智康，王鋼 . ネコ初期視覚野における神経細胞の同期的な活動 . 生体医工学52 ( 6 ) 288 - 295 2014.12ネコ初期視覚野における神経細胞の同期的な活動Reviewed

Jun-ya Okamura, Reona Yamaguchi, Kazunari Honda, Gang Wang, Keiji Tanaka . Neural substrates of view-invariant object recognition developed without experiencing rotations of the objects . Journal of Neuroscience34 ( 45 ) 15047 - 15059 2014.11Neural substrates of view-invariant object recognition developed without experiencing rotations of the objectsReviewed

Jitouzono M., Okamura J., Wang G. . Separation of stimulus selective and non-selective components in intrinsic optical signals. . IEEJ Transactions on Electrical and Electronic Engineering9 ( 3 ) 267 - 274 2014.4Separation of stimulus selective and non-selective components in intrinsic optical signals.Reviewed

Yamaguchi R., Honda K., Okamura J., Saruwatari S., Oshima J. and Wang G. . Dynamics of neuronal responses in the inferotemporal cortex associated with 3D object recognition learning. . M. Lee et al. (Eds) Proceedings of the 20th International Conference on Neural Information Processing (ICONIP 2013), Part III, LNCS 8228 193 - 199 2013.11Dynamics of neuronal responses in the inferotemporal cortex associated with 3D object recognition learning.Reviewed

山口玲欧奈，本田寿成，池尻祐大，岡村純也，王鋼 . 長期的に視覚経験した三次元物体の観察角度像に対する側頭葉下部皮質神経細胞の応答 . 生体医工学51 ( 1 ) 9 - 16 2013.2長期的に視覚経験した三次元物体の観察角度像に対する側頭葉下部皮質神経細胞の応答Reviewed

Kanami Uchimura, Jun-ya Okamura, Gang Wang . Surround modulation in cortical orientation map revealed by optical imaging and its dependency on receptive field eccentricity. . European Journal of Neuroscience36 ( 10 ) 3344 - 3355 2012.11Surround modulation in cortical orientation map revealed by optical imaging and its dependency on receptive field eccentricity.Reviewed

Gang Wang, Midori Nagai, Junya Okamura . Orientation dependency of intrinsic optical signal dynamics in cat area 18 . NeuroImage57 ( 3 ) 1140 - 1153 2011.8Orientation dependency of intrinsic optical signal dynamics in cat area 18Reviewed

永井翠，岡村純也，井上雄太，王鋼 . ネコ第二次視覚野における内因性光学的信号の時間的変化とその傾き方位の依存性 . 生体医工学49 ( 3 ) 485 - 489 2011.6ネコ第二次視覚野における内因性光学的信号の時間的変化とその傾き方位の依存性Reviewed

岡村純也，池尻祐大，山口玲欧奈，王鋼 . 側頭葉下部皮質における観察角度に依らない物体認識の表現 . 電子情報通信学会技術研究報告110 ( 399 ) 45 - 50 2011.1側頭葉下部皮質における観察角度に依らない物体認識の表現Reviewed

Strausfeld N. J.*, Sinakevitch, I., Okamura J.* . Organization of local interneurons in optic glomeruli of the dipterous visual system and comparisons with the antennal lobes. . Developmental Neurobiology67 ( 10 ) 1267 - 1288 2007.9Organization of local interneurons in optic glomeruli of the dipterous visual system and comparisons with the antennal lobes.Reviewed

Toh Y., Okamura J. . Morphological and optical properties of the corneal lens and retinal structure in the posterior large stemma of the tiger beetle larva. . Vision Research47 ( 13 ) 1756 - 1768 2007.6Morphological and optical properties of the corneal lens and retinal structure in the posterior large stemma of the tiger beetle larva.Reviewed

Okamura J., Strausfeld N. J. . Visual system of calliphorid flies: motion- and orientation-sensitive visual interneurons supplying dorsal optic glomeruli. . Journal of Comparative Neurology500 ( 1 ) 189 - 208 2007.1Visual system of calliphorid flies: motion- and orientation-sensitive visual interneurons supplying dorsal optic glomeruli.Reviewed

Strausfeld N. J., Okamura J. . Visual system of calliphorid flies: organization of optic glomeruli and their lobula complex efferents. . Journal of Comparative Neurology500 ( 1 ) 166 - 188 2007.1Visual system of calliphorid flies: organization of optic glomeruli and their lobula complex efferents.Reviewed

Okamura J., Toh Y. . Morphological and physiological identification of medulla interneurons in the visual system of the tiger beetle larva. . Journal of Comparative Physiology A190 ( 6 ) 449 - 468 2004.6Morphological and physiological identification of medulla interneurons in the visual system of the tiger beetle larva.Reviewed

Ikeda S., Toh Y., Okamura J., Okada J. . Intracellular responses of antennal chordotonal sensilla of the American cockroach. . Zoological Science21 ( 4 ) 375 - 383 2004.4Intracellular responses of antennal chordotonal sensilla of the American cockroach.Reviewed

Toh Y., Okamura J., Takeda Y. . Distance and size estimation in the tiger beetle larva: behavioral, morphological and electrophysiological approaches. . Neural Basis of Early Vision (ed. by A. Kaneko), Springer Verlag 77 - 82 2003.9Distance and size estimation in the tiger beetle larva: behavioral, morphological and electrophysiological approaches.

Toh Y., Okamura J. . Forage navigation of hornets studied in natural habitats and laboratory experiments. . Zoological Science20 ( 3 ) 311 - 324 2003.3Forage navigation of hornets studied in natural habitats and laboratory experiments.Reviewed

Okamura J., Toh Y. . Responses of medulla neurons to illumination and movement stimuli in the tiger beetle larvae. . Journal of Comparative Physiology A187 ( 9 ) 713 - 725 2001.11Responses of medulla neurons to illumination and movement stimuli in the tiger beetle larvae.Reviewed

Toh Y., Okamura J. . Behavioural responses of the tiger beetle larva to moving objects: Role of binocular and monocular vision. . Journal of Experimental Biology204 ( 4 ) 615 - 625 2001.2Behavioural responses of the tiger beetle larva to moving objects: Role of binocular and monocular vision.Reviewed

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Papers - OKAMURA Jun-ya