Centers & Labs

RIKEN Brain Science Institute

Rhythm-based Brain Information Processing Unit

Unit Leader: Keiichi Kitajo (Ph.D.)
Keiichi  Kitajo(Ph.D.)

We investigate neural dynamics mediating adaptive and emergent brain functions. Specifically, we focus on functional roles of nonlinear neural dynamics such as oscillations and synchrony in perceptual, motor, cognitive, and communication processes in humans. We take manipulative approaches such as tES(transcranial electrical stimulation), TMS (Transcranial magnetic stimulation)-EEG (Electroencephalography), and neurofeedback to show causal roles of nonlinear neural dynamics in brain functions. We will find extensive applications of our approaches for stoke rehabilitation.

Main Research Field

Complex systems

Related Research Fields

Biological Sciences

Keywords

  • Recording brain activity
  • Brain stimulation
  • Nonlinear neural dynamics

Selected Publications

  1. Teiji Kawano, Noriaki Hattori, Yutaka Uno, Keiichi Kitajo, Megumi Hatakenaka, Hajime Yagura, Hiroaki Fujimoto, Tomomi Yoshioka, Michiko Nagasako, Hironori Otomune, Ichiro Miyai.:
    "Large-scale phase synchrony reflects clinical status after stroke: An EEG study."
    Neurorehabilitation & Neural Repair, 31, 6, 561-570, doi: 10.1177/1545968317697031, 2017.
  2. Takeru Matsuda, Keiichi Kitajo, Yoko Yamaguchi, Fumiyasu Komaki.:
    "A point process modeling approach for investigating the effect of online brain activity on perceptual switching"
    NeuroImage, 152, 50-59, doi: 10.1016/j.neuroimage.2017.02.068, 2017.
  3. Eri Miyauchi, Keiichi Kitajo, Masahiro Kawasaki.:
    "TMS-induced theta phase synchrony reveals a bottom-up network in working memory"
    Neuroscience Letters, 622, 10-14, doi:10.1016/j.neulet.2016.04.008, 2016.
  4. Takumi Sase, Jonatán Peña Ramírez, Keiichi Kitajo, Kazuyuki Aihara, Yoshito Hirata.:
    "Estimating the level of dynamical noise in time series by using fractal dimensions"
    Physics Letters A, 380, 11-12, 1151–1163, doi:10.1016/j.physleta.2016.01.014, 2016.
  5. Takafumi Kajihara, Muhammad Nabeel Anwar, Masahiro Kawasaki, Yuji Mizuno, Kimitaka Nakazawa, Keiichi Kitajo:
    "Neural dynamics in motor preparation: From phase-mediated global computation to amplitude-mediated local computation."
    NeuroImage, 118, 445-455, doi:10.1016/j.neuroimage.2015.05.032, 2015.
  6. Keiichi Kitajo, Takashi Hanakawa, Risto J. Ilmoniemi and Carlo Miniussi,:
    "A contemporary research topic: Manipulative approaches to human brain dynamics."
    Frontiers in Human Neuroscience, 9:118. doi:10.3389/fnhum.2015.00118, 2015.
  7. Muhammad Nabeel Anwar, Muhammad Samran Navid, Mushtaq Khan, Keiichi Kitajo,:
    "A possible correlation between performance IQ, visuomotor adaptation ability and mu suppression"
    Brain Research, 1603, 84–93,doi:10.1016/j.brainres.2015.01.045, 2015.
  8. Michiko Asano, Mutsumi Imai, Sotaro Kita, Keiichi Kitajo, Hiroyuki Okada, Guillaume Thierry,:
    "Sound symbolism scaffolds language developmentin preverbal infants."
    Cortex, 63, 196-205, 2015.
  9. Masahiro Kawasaki, Yutaka Uno, Jumpei Mori, Kenji Kobata, Keiichi Kitajo,:
    "Transcranial magnetic stimulation-induced global propagation of transient phase resetting associated with directional information flow."
    Frontiers in Human Neuroscience, 8:173, doi: 10.3389/fnhum.2014.00173, 2014.
  10. Masahiro Kawasaki, Keiichi Kitajo, Yoko Yamaguchi,:
    "Fronto-parietal and fronto-temporal theta phase synchronization for visual and auditory-verbal working memory."
    Frontiers in Psychology, 5:200, doi:10.3389/fpsyg.2014.00200, 2014.

Lab Members

Principal Investigator

Keiichi Kitajo
Unit Leader

Core Members

Andrzej Cichocki
Research Scientist
Yuka Okazaki
Research Scientist
Takumi Sase
Research Scientist
Yumi Shikauchi
Research Scientist
Hiroki Nakatsuka
Technical Staff I
Yoko Noguchi
Technical Staff II