Principal investigators

Ichiro Fujita

Neural Mechanisms of Visual Perception and Recognition

Main Lab Location:

CiNet (Main bldg.)

Other Affiliations:

Professor, Osaka University Graduate School of Frontier Biosciences
Adjunct Professor, Osaka University Facutly of Engineering Science
Adjunct Professor, Osaka University Center for the Study of Communication-Design
Adjunct Professor, Osaka University Institute of Social and Economic Research

Phone: 

+81-6-6879-4439

Fax: 

+81-6-6879-4439

Mailing Address:

1-4 Yamadaoka, Suita City Osaka, 565-0871

Email: 

fujita at fbs.osaka-u.ac.jp

Homepage:

Research in my laboratory focuses on the neural mechanism of visual perception and recognition. I try to link activities of single or a population of neurons through the neural circuit to events in our/animal’s mind and behavior.

We live in a complex visual world, yet we can identify all the objects around us without a problem. If we consider the following, we can understand how truly remarkable this feat is. No retinal image can ever be reproduced exactly, because our visual world is forever changing from moment to moment. Retinal images change owing to many factors including changes in illumination and vantage point, or motion and articulation of objects. An object you look at may even be partially occluded by another object in front of it. The retinal image also lacks a large part of information along the depth direction. It is a 2-dimensional image, whereas the real and perceived world is 3-dimensional! The retinal image is thus changing, unpredictable, and imperfect in many ways, but based on visual information conveyed by the retina, our brain is able to perceive and recognize objects, people, and scenes veridically.

I am particularly interested in the computational process and neural architecture supporting binocular depth perception and object recognition. We take a multidisciplinary approach using electrical and optical imaging of neuronal activity, structural analysis of cortical architecture, psychophysics, and computational modeling.

Selected Publications:

Chang DHF, Troje NF, Ikegaya Y, Fujita I, Ban H (2021) Spatiotemporal dynamics of responses to biological motion in the human brain. Cortex 136: 124-139.

Yoshioka TW, Doi T, Abdolrahmani M, Fujita I (2021) Specialized contributions of mid-tier stages of dorsal and ventral pathways to stereoscopic processing in macaque.
eLife 10: e58749.

Chang DHF, Ban H, Ikegaya Y, Fujita I, Troje N (March 2018) Cortical and subcortical responses to iological motion. Neuroimage, doi: 10.1016/j.neuroimage.2018.03.013

Ikezoe K, Amano M, Nishimoto S, Fujita I (Jan 2018) Mapping stimulus feature selectivity in macaque V1 by two-photon Ca2+ imaging: Encoding-model analysis of fluorescence responses to natural movies.
NeuroImage, doi: 10.1016/j.neuroimage.2018.01.009 https://doi.org/10.1016/j.neuroimage.2018.01.009

Wang QX, Tanigawa H, Fujita I (2017) Postnatal development of intrinsic horizontal axons in macaque inferior temporal and primary visual cortices.  Cerebral Cortex 27(4): 2708-2726. doi: 10.1093/cercor/bhw105

Fujita I, Doi T (2016) Weighted parallel contributions of binocular correlation and match signals to conscious perception of depth. Phil Trans R Soc B 20150257. doi: 10.1098./rstb.2015.0257

Lab Members:

Researcher
・Hiroshi Tamura
・Mikio Inagaki
Fang Yang
・Shoko Kanaya
・Bayu Gautama Wundari

Student
・ChanSeok Lim
・Mashiro Mita
・Gaku Hatanaka
・Yusei Takeshima
・Hiroya Onishi
・Taiga Sasaki

Secretary
・Yukari Takuwa