Phase synchronization-desynchronization and perceptual dynamics
Manipulative approach to neural synchrony by Transcranial magnetic stimulation (TMS) and EEG recordings
Stochastic resonance (SR) within the human brain
Noise can play a constructive role in information transfer via a mechanism
known as stochastic resonance (SR), whereby the response of a nonlinear
system to a weak input signal is optimized by the presence of a nonzero
level of noise. I investigate SR in the human brain - in particular SR
in visual perception , auditory perception, crossmodal perception.
SR and large-scale sycnrhonization of human brain activity
I investigate large-scale synchronization of human brain activity (EEG
potential and Scalp current density) as a possible mechanism of behavioral
or perceptuals SR.
Higher cognitive functions and SR. SR in multi-stable perception (attention,
ambiguous figures etc..)
Ongoing activity and the brain.
Selected Publications, Please don't hesitate to contact me if you need
reprints or pdfs.
Publications:
International papers:
Masanori Shimono, Keiichi Kitajo, Tsunehiro Takeda,
Neural processes for intentional control of perceptual switching: An MEG study.
Human Brain Mapping, 32, 397-412, 2011.
Daisuke Shimaoka, Keiichi Kitajo, Kunihiko Kaneko, Yoko Yamaguchi,
Transient process of cortical activity during Necker cube perception: from local clusters to global synchrony. Nonlinear Biomedical Physics, 4, S7, doi:10.1186/1753-4631-4-S1-S7, 2010.
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka and Yoko Yamaguchi, State-dependent cortical synchronization networks revealed by TMS-EEG Recordings. Advances in Cognitive Neurodynamics II, 145-148, 2010.
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, How does
stochastic resonance work within the human brain? Psychophysics of internal and external noise.
Chemical Physics, Chemical Physics, 375, 616-624, 2010.
Masahiro Kawasaki, Keiichi Kitajo, Yoko Yamaguchi, Dynamic links between theta executive functions and alpha storage buffers in auditory and visual working memory. European Journal of Neuroscience, 31, 1683-1689, 2010.
Tamami Nakano, Yoshiharu Yamamoto, Keiichi Kitajo, Toshimitsu Takahashi,
Shigeru Kitazawa, Synchronization of spontaneous eye blinks while viewing
video stories. Proceedings of the Royal Society B, Proceedings of the Royal Society B, 276, 3635-3644, 2009.
Sam M. Doesburg, Alexa B. Roggeveen, Keiichi Kitajo, Lawrence M Ward, Large-scale
gamma-band phase synchronization and selective attention. Cerebral Cortex,
18, 386-396, 2008.
Keiichi Kitajo, Sam M. Doesburg, Kentaro Yamanaka, Daichi Nozaki, Lawrence
M Ward, Yoshiharu Yamamoto, Noise-induced large-scale phase synchronization
of human brain activity associated with behavioural stochastic resonance.
Europhysics Letters, 80, 40009-1-6, 2007.
Masanori Shimono, Takashi Owaki, Kaoru Amano, Keiichi Kitajo, Tsunehiro Takeda,
Functional modulation of power-law distribution in visual perception.
Physical Review E, 75, 051902-1-5, 2007.
Keiichi Kitajo, Takashi Ozaki, Yoko Yamaguchi, Large-scale neural synchrony
associated with top-down selective attentional modulation of Necker cube
perception. Proceedings of the 23rd Annual Meetings of the International
Society for Psychophysics. 345-350, 2007.
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, Intrinsic
noise regulates extrinsic noise-induced sensitisation of visual perception.
Proceedings of the 23rd Annual Meetings of the International Society for Psychophysics. 97-102, 2007.
Lauren Emberson, Keiichi Kitajo, Lawrence M Ward, Endogenous neural noise and
stochastic resonance. Proceedings of SPIE, 6602, 66020T-1-66020T-12, 2007.
Keiichi Kitajo, Kentaro Yamanaka, Lawrence M Ward, Yoshiharu Yamamoto, Stochastic
resonance in attention control. Europhysics Letters, 76:1029-1035, 2006.
(This paper was selected as the
Europhysics Letters, Editorial board highlights of 2006)
Lawrence M Ward, Sam M. Doesburg. Keiichi Kitajo, Shannon E. MacLean,
Alexa B. Roggeveen, Neural synchrony in stochastic resonance, attention,
and consciousness. Canadian Journal of Experimental Psychology, 60,
319-326, 2006.
Lawrence M Ward, Keiichi Kitajo, Attention excludes noise. Does it exclude
stochastic resonance? AIP Conference Proceedings, 800, 245-252, 2005.
Yoshiharu Yamamoto, Rika Soma, Keiichi Kitajo, Leonid A. Safonov, Kentaro
Yamanaka, Ichiro Hidaka, Kyoko Ohashi, Daichi Nozaki, Zbigniew R. Struzik,
Lawrence M Ward, Shin Kwak, Functional roles of noise and fluctuations in
the human brain. AIP Conference Proceedings, 780, 535-540, 2005.
Keiichi Kitajo, Kentaro Yamanaka, Lawrence M Ward, Yoshiharu Yamamoto,
Stochastic resonance in attention switching. Proceedings of SPIE, 5841: 49-56, 2005.
Sam M. Doesburg, Keiichi Kitajo, and Lawrence M Ward, Increased gamma-band
synchrony precedes switching of conscious perceptual objects in binocular
rivalry. NeuroReport, 16: 1139-1142, 2005.
Keiichi Kitajo, Kentaro Yamanaka, Daichi Nozaki, Lawrence M Ward, Yoshiharu
Yamamoto, Behavioral stochastic resonance is associated with large-scale
synchronization of human brain activity. Proceedings of SPIE, 5467:359-369,
2004.
Keiichi Kitajo, Daichi Nozaki, Lawrence M Ward, Yoshiharu Yamamoto, Behavioral
stochastic resonance within the human brain. Physical Review Letters, 90: 218103-1-4, 2003.
(This paper was featured by Physical Review Focus, New Scientist, CERN COURIER,
and Kyodo News, etc.)
Keiichi Kitajo, Daichi Nozaki, Lawrence M Ward, Yoshiharu Yamamoto, Behavioral
stochastic resonance in the human brain. Proceedings of SPIE, 5110: 252-261,
2003.
Submitted papers:
Sohei Wakisaka, Hiroyuki Ohta, Keiichi Kitajo, Yukio P. Gunji, Illusion
with one eye closed offers a new way to see interactions in the visual system.
Conference presentations:
International presentations and invited talks:
Keiichi Kitajo, Yumi Nakagawa, Yutaka Uno, Yoko Yamaguchi, Phase control of human brain activity by single-shot TMS. The 41st Annual Meeting of Society for Neuroscience, Washington DC, USA, November, 2011
Naoya Oosugi, Keiichi Kitajo, Naotaka Fujii, Compensating disadvantage of EEG with simultaneously recorded Electro-corticogram (ECoG).The 41st Annual Meeting of Society for Neuroscience, Washington DC, USA, November, 2011
Mutsumi Imai, Michiko Asano, Mamiko Arata, Sotaro Kita, Hiroyuki Okada, Keiichi Kitajo, Guillame Thierry, Eleven month-old infants detect sound symbolism: Evidence from an ERP study. The 36th Annual Boston University Conference on Language Development, Boston, USA, November, 2011.
Daisuke Shimaoka, Keiichi Kitajo, Kunihiko Kaneko, Yoko Yamaguchi, Role of spontaneous phase coherence across cortical areas on visual perception.
The 34th Annual Meeting of the Japan Neuroscience Society, Yokohama, Japan, September, 2011.
Michiko Asano, Keiichi Kitajo, Mamiko Arata, Guillaume Thierry, Sotaro Kita, Hiroyuki Okada, Mutsumi Imai, Preverbal infants' sensitivity to sound symbolism: An EEG study. The 34th Annual Meeting of the Japan Neuroscience Society, Yokohama, Japan, September, 2011.
Keiichi Kitajo, Yumi Nakagawa, Yutaka Uno, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi, State-dependency in large scale propagation of phase reset of ongoing activity. The 34th Annual Meeting of the Japan Neuroscience Society, Yokohama, Japan, September, 2011.
Masahiro Kawasaki, Keiichi Kitajo, Yoko Yamaguch, Dual EEG analyses for synchronized behaviors of two person during an alternately tapping, 8th World Congress of International Brain Research Organization, Florence, Italy, July, 2011.
Keiichi Kitajo,. Stochastic resonance and noise-enhanced phenomena in the human brain. SIAM Conference on Applications of Dynamical Systems 2011, Snowbird, USA, May 2011. (invited)
>Keiichi Kitajo, Yumi Nakagawa, Yutaka Uno, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi, State-dependent synchrony networks in humans revealed by TMS-EEGrecordings The 40th Annual Meeting of Society for Neuroscience, SanDiego, USA, November, 2010.
Keiichi Kitajo, Manipulative approaches to causal links between neural synchrony and perception in humans, 22nd Brain Science Seminar at Saitama University, Brain Science Institute, Saitama, Japan, October, 2010.(invited)
Keiichi Kitajo, Manipulative approaches to neural synchrony and perception in humans. Neuro2010, Kobe,
Japan, September, 2010. (invited)
Keiichi Kitajo, Phase synchronization and stochastic resonance in the human brain.
Winter School on Neural Computation, Phoenix Park, Pyeongchang, Korea, January, 2010.(invited)
Daisuke Shimaoka, Keiichi Kitajo, Kunihiko Kaneko, Yoko Yamaguchi
Transient cortical activity during Necker cube perception from local clusters to global synchrony.
Consciousness and its Measures, Limassol, Cyprus, November, 2009.
Daisuke Shimaoka, Keiichi Kitajo, Kunihiko Kaneko, Yoko Yamaguchi
Transient dynamics of EEG activity during Necker cube perception; from clustering to global synchronization.
International Symposium on Complex Systems Biology, Tokyo, Japan, September, 2009.
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi,
State-dependent cortical synchronization networks revealed by TMS-EEG recordings.
The 2nd International Conference on Cognitive Neurodynamics, Hangzhou, China, November, 2009.(invited)
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi,
Frequency-specific and state-dependent cortical network connectivity revealed by TMS-EEG recordings in humans.
The 39th Annual Meeting of Society for Neuroscience, Chicago, USA, October, 2009.
Takashi J Ozaki, Naoyuki Sato, Keiichi Kitajo, Yoshiaki Someya, Kimitaka Anami, Hiroaki Mizuhara, Seiji Ogawa, Yoko Yamaguchi,
Dorsal attention network correlated with EEG slow oscillations initiates spontaneous perceptual switching.
The 39th Annual Meeting of Society for Neuroscience, Chicago, USA, October, 2009.
Maria Kharitonova, Tim Curran, Yuko Munakata, Keiichi Kitajo, Yoko Yamaguchi;
Theta oscillations reflect individual differences in working memory capacity
The 39th Annual Meeting of Society for Neuroscience, Chicago, USA, October, 2009.
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi,
State-dependent cortical synchronization networks in humans revealed by TMS-EEG recordings.
NIPS International Workshop for Scientific Study of Consciousness. Okazaki, Japan, September, 2009.
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko Yamaguchi,
Changes in frequency-specific cortical network connectivity in open eye and
closed eye conditions revealed by TMS-EEG measurement. The 32nd Annual Meeting of the
Japan Neuroscience Society, Nagoya, Japan, September, 2009.
Sohei Wakisaka, Keiichi Kitajo, Yoko Yamaguchi, New interocular transfer and illusory
conjunction during binocular rivalry. The 32nd Annual Meeting of the Japan Neuroscience
Society, Nagoya, Japan, September, 2009.
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto,
Bayesian adaptive estimation of a psychometric model for stochastic resonance.
The 32nd Annual Meeting of the Japan Neuroscience
Society, Nagoya, Japan, September, 2009.
Keiichi Kitajo, Stochastic resonance and noise-induced synchronization
in the human brain, Fluctuation and noise in living organisms: from random
dynamical systems point of view Wako, Japan, July, 2009.(invited)
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko
Yamaguchi, Frequency-specific changes in TMS-evoked cortical activity in
open eye and closed eye conditions. The 15th Annual Meeting of Human Brain
Mapping, San Francisco, USA, June, 2009.
Keiichi Kitajo, Ryohei Miyota, Masanori Shimono, Kentaro Yamanaka, Yoko
Yamaguchi, Manipulation of synchronous neural oscillations and cognitive
processes by transcranial magnetic stimulation, Dynamic Brain Forum 2009,
Atami, March, 2009, (invited)
Sohei Wakisaka, Yukio Guji, Hiroyuki Ohta, Keiichi Kitajo, Yoko Yamaguchi,
Binocular rivalry between patterns and visual noises: way to `see' your spontaneous
activity in the early visual system by yourself, 31st European Conference on Visual
Perception, Utrecht, Netherland, August, 2008.
Keiichi Kitajo, Takashi Ozaki, Yoko Yamaguchi, Cooperative formation
of theta and gamma-band synchronization networks in Necker cube perception,The
37th Annual meeting of Society for Neuroscience, San Diego, USA, November,
2007.
Takashi Ozaki, Naoyuki Sato, Keiichi Kitajo, Yoshiaki Someya, Kimitaka Anami,
Hiroaki Mizuhara, Seiji Ogawa, Yoko Yamaguchi, Theta synchronization networks
observed by simultaneous EEG-fMRI measurement during bistable perception. The
37th Annual meeting of Society for Neuroscience, San Diego, USA, November, 2007.
Keiichi Kitajo, Takashi Ozaki, Yoko Yamaguchi, Large-scale neural synchrony
associated with top-down selective attentional modulation of Necker cube perception.
The 23rd Annual Meetings of the International Society for Psychophysics, Tokyo, JAPAN, October, 2007
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, Intrinsic noise
regulates extrinsic noise-induced sensitisation of visual perception. The 23rd Annual
Meetings of the International Society for Psychophysics, Tokyo, JAPAN, October, 2007.
Keiichi Kitajo, Takashi Ozaki and Yoko Yamaguchi, EEG large-scale phase synchronization
associated with top-down control of human perception, RIKEN SYMPOSIUM, Brain activity and information
integration, Wako, JAPAN, September, 2007.
Masanori Shimono, Takashi Owaki, Kaoru Amano, Keiichi Kitajo, Tsunehiro Takeda,
Functional modulation of power-law distribution in visual perception, RIKEN SYMPOSIUM,
Brain activity and information integration, Wako, JAPAN, September, 2007.
Keiichi Kitajo, Takashi Ozaki and Yoko Yamaguchi, Network formation by theta and
gamma-band synchronization in visual perception, Neuro2007, Yokohama, JAPAN, September, 2007.
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, Bayesian
adaptive estimation of psychometric functions in noisy environments. 19th
International Conference on Noise and Fluctuations, Tokyo, JAPAN, September, 2007.
Takatsugu Aihara, Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, Intrinsic
noise determines visual stochastic resonance. BioStatPhys in UT '07, Tokyo,
JAPAN, September, 2007.
Keiichi Kitajo, Stochastic resonance in the brain. National Institute of Advanced
Industrial Science and Technology, Cognition and Action Research Group,
Group seminar, Tsukuba, Japan, September, 2007. (invited)
Keiichi Kitajo, Yoko Yamaguchi, Cooperative networking by multiple frequency
synchronization observed by EEG during bistable perception. The 13th Annual
Meeting of Human Brain Mapping, Chicago, USA, June, 2007.
Lauren Emberson, Keiichi Kitajo, Lawrence M Ward, Slightly noisy brains see
better: Prestimulus dynamics in EEG and perceptual performance. 2007 Annual
Meeting of the Cognitive Neuroscience Society, New York City, USA, May, 2007.
Lauren Emberson, Keiichi Kitajo, Lawrence M Ward, Endogenous neural noise and
stochastic resonance, SPIE the 4th International Symposium on Fluctuations and
Noise, Florence, Italy, May, 2007.
Keiichi Kitajo, Kentaro Yamanaka, Daichi Nozaki, Lawrence M Ward, Yoshiharu
Yamamoto, Noise-improved visual perception associated with frequency-specific
large-scale synchronization of human brain activity. The 12th Annual Meeting of
Human Brain Mapping, Florence, Italy, June, 2006.
Keiichi Kitajo, Kentaro Yamanaka, Daichi Nozaki, Lawrence M Ward, Yoshiharu
Yamamoto, Behavioral stochastic resonance associated with noise-enhanced
large-scale synchronization of human brain activity, 2006 Japan-Germany
Symposium on Computational Neuroscience, Wako, Japan, February, 2006.
Lawrence M Ward, Keiichi Kitajo, Attention excludes noise. Does it exclude
stochastic resonance? 4th International Conference on Unsolved Problems of
Noise and Fluctuations in Physics, Biology and High Technology, Gallipoli,
Italy, June, 2005.
Keiichi Kitajo, Stochastic resonance in human perception. Hokkaido University
COE Workshop : Complex Dynamics of Networks of Oscillators : From Basic Research
to Novel Therapy. November, 2005. (invited)
Yoshiharu Yamamoto, Rika Soma, Keiichi Kitajo, Leonid A. Safonov, Kentaro Yamanaka,
Ichiro Hidaka, Kyoko Ohashi, Daichi Nozaki, Zbigniew R. Struzik, Lawrence M Ward,
Shin. Kwak, Functional roles of noise and fluctuations in the human brain. The 18th
International Conference on Noise and Fluctuations 2005, Salamanca, Spain, September, 2005.
Keiichi Kitajo, Stochastic resonance within the human brain. RIKEN BSI seminar,
Wako, Japan, August, 2005. (invited)
Keiichi Kitajo, Kentaro Yamanaka, Lawrence M Ward, Yoshiharu Yamamoto, Stochastic
resonance in attention switching. SPIE the Third International Symposium on Fluctuations
and Noise, Austin, USA, May, 2005.
Sam M. Doesburg, Keiichi Kitajo, Lawrence M Ward, Increased gamma-band synchrony
precedes switching of conscious perceptual objects in binocular rivalry. 2005 Annual
Meeting of the Cognitive Neuroscience Society, New York City, USA, April, 2005.
(Graduate Students Present Award talk (Doesburg))
Keiichi Kitajo, Kentaro Yamanaka, Daichi Nozaki, Lawrence M Ward, Yoshiharu Yamamoto,
Behavioral stochastic resonance is associated with large-scale synchronization
of human brain activity. SPIE the Second International symposium on Fluctuations
and Noise, Canary Islands, Spain, May, 2004.
Keiichi Kitajo, Daichi Nozaki, Lawrence M Ward, Yoshiharu Yamamoto, Behavioral
stochastic resonance in the human brain. SPIE the First International Symposium
on Fluctuations and Noise, Santafe, USA, June, 2003.
Keiichi Kitajo, Daichi Nozaki, Yoshiharu Yamamoto, Human perception-action coupling
enhanced by stochastic resonance. First SIAM (Society for Industrial and Applied
Mathematics) Conference on Life Sciences, Boston, USA, February, 2002.
Keiichi Kitajo, Inter-blink interval and human cognition.;Measurements, analyses,
and modeling of spontaneous rhythmicity in biosignals; International Scientific
Research, Ministry of Education, Science and Culture: Joint Research Program on
Functional Role of Noise in Physiological Control Systems. March, 2000.(invited)
Keiichi Kitajo, Chiho Fukusaki, Yoshiharu Yamamoto, Hideo Yano and Mitsumasa Miyashita,
Development of the inhibitory system in human spinal cord. The Third World Congress of
Biomechanics, Sapporo, Japan, August, 1998.
Keiichi Kitajo, Masato Shirayama, Mitsumasa Miyashita, Elbow movement patterns predicted
by means of an artificial neural network. The 15th Congress of the International Society
of Biomechanics, Jyvaskyla, Finland, July, 1995.
Principal Investigator, PRESTO (Precursory Research for Embryonic Science and Technology)
Japan Science and Technology Agency (2009-2013), 40 million yen,
Manipulation of neural information processing by real-time TMS control.
Principal Investigator, Grant-in-Aid for Scientific Research on Innovative Areas, Ministry of
Education, Culture, Sports, Science and Technology, Japan (2009-2014).2million yen,
Mechanisms of cognitive information processing based on synchronization and de-synchronization in neural networks.
Principal Investigator, Grant-in-Aid for Scientific Research, Ministry
of Education, Culture, Sports, Science and Technology, Japan (2007). Transcranial
Magnetic Stimulation and EEG phase synchrony responses in humans.
Principal Investigator, Grant-in-Aid for Scientific Research, Ministry
of Education, Science and Culture, Japan (2001-2002). Relationship between
spontaneous eye blinking and human cognition during voluntary movement.
Principal Investigator, Grant-in-Aid for Scientific Research, Ministry
of Education, Science and Culture, Japan (1999-2000). Changes in visual
and somato-sensory information processing during human motor learning.
Principal Investigator. Research Award of Casio Science Foundation, Japan
(1999). Effect of human cognitive process on eye blinking - Development
of portable measurement device for eye blinking -.
Ad hoc reviewers
Neural Networks
Journal of Cognitive Neuroscience
Neuroscience
Neuroscience Research
Brain Research
Computational Intelligence and Neuroscience
IEICE Transactions
Advances in Artificial Intelligence
Transactions on Information Technology in BioMedicine
