Summary of Research Project Results Under the JSPS FY2000
"Research for the future Program"



1.Research Institution Tamagawa University
 
2.Research Area Integrated Fields
 
3.Research Field Information on Life Systems
 
4.Term of Project FY1996〜FY2000
 
5.Project Number 96I00104
 
6.Title of Project Self-organization of Informational Representation and Learnable Neurotips

7.Projetct Leader
Name Institution,Department Title of Position
Minoru Tsukada Tamagawa University, Brain Science Research Center / Faculty of Engineering Professor

8.Core Members

Names Institution,Department Title of Position
Hideaki Saito Tamagawa University, Brain Science Research Center / Faculty of Engineering Professor
Nozomu Hoshimiya Tohoku University / Graduate school of Engineering Professor
Kazuyuki Aihara Tokyo University / Graduate School of Frontier Sciences Professor

9.Cooperating Researchers

Names Institution,Department Title of Position
Ryoukou Futami Tohoku University / Graduate school of Engineering Assistant Professor
Yoshihiko Horio Tokyo Denki University / Faculty of Engineering Assistant Professor
Ichiro Tsuda Hokkaido University / Graduate school of Science Professor

10.Summary of Research Results

The episodic memory system is classified into the two subsystems according to the span of memory time; short-term memory (hippocampus) and long-term memory (association cortices). Dynamic interactions between the two subsystems play an important role in storing and retrieving memory contents. Based on the physiological experiments of the LTP/LTD in the hippocampal neural networks and the hippocampal-auditory cortical interaction in guinea pig, we proposed a model of hippocampal-cortical memory system and implemented it in learnable neurotips. The model algorithms are the following ;
1). A spatio-temporal learning rule which consistently interpreted the experimental results of LTP/LTD in the hippocampus was used to make a context (global information) from spatial and temporal events (local information). 2). The local-global information worked as an index (addressor) in storing and retrieving long-term memory contents. 3). A dynamic cell assembly formed by the time-coincidence played an important role in the memory storing and retrieving processes.

11.Key Words

(1)Memory、(2)Learning、(3)Hippocampal-cortical Memory System
(4)Dynamical Information Representation、(5)Spatio-Temporal Learning Rule、(6)Contextual addressing
(7)Dynamical Cell Assembly

12.References

[Reference Articles]
Author Title of Article
Hironori Matsuda, Takeshi Aihara, Masami Tatsuno, Minoru Tsukada and Kazuyuki Aihara Chaotic stimulus dependent long-term potentiation in the hippocampal CAI area
Journal Volume Year Pages Concerned
Biosystems 58 2000 pp.273-279

Author Title of Article
Takeshi Aihara, Minoru Tsukada and Hironori Matsuda Two dynamic processes for the induction of long-term potentiation in hippocampal CAI area
Journal Volume Year Pages Concerned
Biological Cybernetics 82 2000 pp.189-195

Author Title of Article
Susumu Takahashi, Yuki Kobayashi, Takeshi Aihara, Minoru Tsukada, Yuichiro Anzai Blind Separation of Neuronal Activities from Optical Imaging Data
Journal Volume Year Pages Concerned
The Brain & Neural Networks 8 2000 pp.3-12

Author Title of Article
Yuki Kobayashi, Hideaki Shimazaki Takeshi Aihara, Minoru Tsukada Spatial distributions of hippocampal LTP/LTD induced electrically from schaffer collaterals and stratum oriens with relative timing
Journal Volume Year Pages Concerned
The Brain & Neural Networks     In press

Author Title of Article
Minoru Tsukada Learning Rules in the Hippocampal Netwark and Their Efficiency Estimated Through the Model
Journal Volume Year Pages Concerned
Experimental Medicine 18 2000 pp.2673-2680

Author Title of Article
Hironori Matsuda, Takeshi Aihara, Minoru Tsukada, Masami Tatsuno, Kazuyuki Aihara Chaotic Stimulus Dependent Long-Term Potentiation(LTP) in the Hippocampal CA1 Area
Journal Volume Year Pages Concerned
The Brain & Neural Networks 6 1999 pp.117-127

Author Title of Article
Jun Yamamoto, Muneyoshi Takahashi, Minoru Tsukada, Yuichiro Anzai A New Multi-Unit Acquisition System for Free-Moving Animal Using Field Programmable Analog Array and on Chip MCU - Neuroscope 1 -
Journal Volume Year Pages Concerned
The Brain & Neural Networks 6 1999 pp.3-10

Author Title of Article
Jun Yamamoto, Hiroyuki Monji, Mizuki Okanda, Minoru Tsukada, Hiroshi Sasaki, Koyu Fukunishi, Yuichiro Anzai An Evoked Dynamic Interaction in the Guinea Pig Auditory Cortex by Compound Acoustic-Hippocampal Stimuli -An Optical Imaging Analysis
Journal Volume Year Pages Concerned
The Brain & Neural Networks 6 1999 pp.11-16

Author Title of Article
Minoru Tsukada Memorizing Mechanism
Journal Volume Year Pages Concerned
Computer Today 84 1999 pp.22-27

Author Title of Article
Takeshi Aihara, Minoru . Tsukada Michael C. Crair, and Shigeru Sinomoto Stimulus-Dependent Induction of Long-Term Potentiation in CAl Area of the Hippocampus ; Experiment and Model
Journal Volume Year Pages Concerned
Hippocampus 7 1997 pp.416-426

Author Title of Article
Minoru Tsukada Neural Network and Learning Rule
Journal Volume Year Pages Concerned
Development of Neural Research 41 1997 pp.843-854

Author Title of Article
Minoru Tsukada, Takeshi Aihara, Hideaki Saito and Hiroshi Kato Hippocampal LTP depends on spatial and temporal correlation of inputs
Journal Volume Year Pages Concerned
Neural Network 9 1997 pp.1357-1365

Author Title of Article
Minoru Tsukada, Takeshi Aihara, Hideaki Saito, Hiroshi Kato, Michael C. Crair, and Shigeru Sinomoto Spatio-temporal aspects of learning and memory in the hippocampal-cortical memory system
Journal Volume Year Pages Concerned
Biological Cybernetics 1 1996 pp.113-136

Author Title of Article
Okamoto H., Kawakami, S., Saito, H., Hida, E., Odajima, K., Tamanoi, D., Ohno, H. MT neurons in the macaque exhibited two types of bimodal direction tuning as predicted by a model for visual motion detection
Journal Volume Year Pages Concerned
Vision Research 39 1999 pp.3465-3479

Author Title of Article
Adachi M. and Aihara K Associative Dvnamics in a Chaotic Neural Network
Journal Volume Year Pages Concerned
Neural Networks 10 1997 pp.83-98

Author Title of Article
Natsuhiro Ichinose, Kazuyuki Aihara, Yoichi Okabe Correlation Codeing and Adaptation of Delays on Pulse Neural Networks
Journal Volume Year Pages Concerned
The Brain & Neural Networks 4 1997 pp.10-17

Author Title of Article
Yosihiko Horio Chaos Neural Computer
Journal Volume Year Pages Concerned
Computer Today 14 1997 pp.14-21

Author Title of Article
Hirata Akihito, Hidetoshi Shimokawa, Kazuyuki Aihara Entropy Function of Linear Map and Information Source Coding
Journal Volume Year Pages Concerned
The Transaction of the Institute of Electronics, Information and Communication Engineers D 12 1999 pp.1780-1792

Author Title of Article
Shinichiro Kano, Takeshi Ito, Kunio Kazami, Akihiro Futami, Nozomu Hoshimiya Examination of Mismatch Response for Difference of Tone Duration by EEG and MEG
Journal Volume Year Pages Concerned
ME and Biocybernetics 35 1997 pp.460-465

Author Title of Article
Erdi P. and Tsuda I. Hermeneutic approach to the brain
Journal Volume Year Pages Concerned
Theoria et historia scientiarum     In press

Author Title of Article
Tsuda I. and Hatakeyama M. Making sense of internal logic : Theory and case study
Journal Volume Year Pages Concerned
Science of interfaces     In press

Author Title of Article
Tsuda I. and Kuroda S. Cantor coding in the hippocampus
Journal Volume Year Pages Concerned
J. J. appl. math.     In press

Author Title of Article
Tsuda I. Towards an interpretation of dynamic neural activity in terms of chaotic dynamical systems
Journal Volume Year Pages Concerned
Behavioral and brain science     In press

[Reference Books]
Author Title of Book
Hideaki Saitoh Brain・Heart・Computer
Publisher Year Pages
Maruzen 1996 261

Author Title of Book
Hideaki Saitoh Visual Perception and Auditory Perception
Publisher Year Pages
Ohmsha 1999 275

Author Title of Book
Aihara K The Impact of chaos on science and society
Publisher Year Pages
United Nations University Press 1997 401

Author Title of Book
Watanabe M, Aihara K and Kondo S Control and Chaos
Publisher Year Pages
Birkhauser, Boston 1997 333


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