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Hiroshi Imamizu, Ph.D.
 

Department of Cognitive Neuroscience
ATR Cognitive Mechanisms Laboratories

Center for Information and Neural Networks
National Institute of Information and Communications Technology

 

Background
Research Interests
Publications
Affiliations
Address


 
 
 
Background

I obtained a Ph.D. (Experimental Psychology, 1995) and MS (Experimental Psychology, 1989) both from the University of Tokyo, Japan. I worked in ATR Human Information Processing Research Laboratories in Kyoto from 1992 to 96 as a Research Associate. From 1996 to 2001, I worked as a leader of Computational Psychology Group in KDB, ERATO, JST. From 2001 to 2004, I worked as a senoir researcher in ATR Human Information Science Laboratories. From 2004 to 2010, I worked as a head of Department of Cognitive Neuroscience in ATR Computational Neuroscience Laboratories. I have been working as a leader of Biological ICT Group in National Institute of Information and Communications Technology since 2009, and a director of ATR Cognitive Mechanisms Laboratories since 2010.

Research Interests

My original research interest is in human sensorimotor learning from psychological and computational points of view. Using methods of experimental psychology, I have been studied generalization abilities of skills and coordinate systems adopted by the sensorimotor integration mechanism. I have started investigating brain activation using fMRI (functional magnetic resonance imaging) when human subjects are learning skills to use a new tool.


Publications

Request for reprints ----imamizu @ gmail.com


Ogawa K. & Imamizu H. (2013).
Human sensorimotor cortex represents conflicting visuomotor mappings.  
Journal of Neuroscience, 33(15), 6412-22  [PDF]

Honda T., Hagura N., Yoshioka T., & Imamizu H. (2013).
Imposed visual feedback delay of an action changes mass perception based on the sensory prediction error.  
Frontiers in Psychology, 4, Article #760  [PDF]

Tanaka H., Homma K., & Imamizu H. (2012).
Illusory reversal of causality between touch and vision has no effect on prism adaptation rate. 
Frontiers in Psychology, 3, Article #545  [PDF]

Imamizu H. & Kawato M. (2012). Review
Cerebellar Internal Models: Implications for the Dexterous Use of Tools. 
Cerebellum  [PDF]

Tanaka H., Homma K., & Imamizu H. (2011).
Physical delay but not subjective delay determines learning rate in prism adaptation. 
Experimental Brain Research, 208(2), 257-68  [PDF]

Toda A., Imamizu H., Kawato M., & Sato MA. (2011).
Reconstruction of two-dimensional movement trajectories from selected magnetoencephalography cortical currents by combined sparse Bayesian methods. 
NeuroImage, 54(2), 892-905  [PDF]

Imamizu H. (2010). Review
Prediction of sensorimotor feedback from the efference copy of motor commands: A review of behavioral and functional neuroimaging studies. 
Japanese Psychological Research, 52(2), 107-20  [PDF]

Imamizu H. & Kawato M. (2009). Review
Brain mechanisms for predictive control by switching internal models: implications for higher-order cognitive functions. 
Psychological Research, 73(4), 527-44  [PDF]

Imamizu H. & Kawato M. (2008).
Neural correlates of predictive and postdictive switching mechanisms for internal models. 
Journal of Neuroscience, 28(42), 10751-65  [PDF]

Imamizu H., Sugimoto N., Osu R., Tsutsui K., Wada Y. & Kawato M. (2007).
Explicit contextual information selectively contributes to predictive switching of internal models. 
Experimental Brain Research, 181(3), 395-408  [PDF]

Imamizu H., Higuchi S., Toda A., & Kawato M. (2007).
Reorganization of brain activity for multiple internal models after short but intensive training. 
Cortex, 43(3), 338-349.  [PDF]

Imamizu H., Kuroda T., Yoshioka T., & Kawato M. (2004).
Functional magnetic resonance imaging examination of two modular architectures for switching multiple internal models. 
Journal of Neuroscience, 24(5), 1173-81. [PDF]

Imamizu H., Kuroda T., Miyauchi S., Yoshioka T., & Kawato M. (2003).
Modular organization of internal models of tools in the human cerebellum. 
Proc Natl Acad Sci U S A, 100, 5461-6. [PDF] [Movie]

Imamizu H., Miyauchi S., Tamada,T., Sasaki Y., Takino R., Puetz B., Yoshioka T., Kawato M. (2000).
Human cerebellar activity reflecting an acquired internal model of a novel tool. 
Nature, 403, 192-195. [PDF]

Imamizu, H., Uno, Y., & Kawato, M. (1998).
Adaptive internal model of intrinsic kinematics involved in learning an aiming task.
J Exp Psychol Hum Percept Perform, 24(3), 812-29.
[PDF(2.2M), Compressed(682K)]

Imamizu, H., Uno, Y., & Kawato, M. (1995).
Internal representations of the motor apparatus: implications from generalization in visuomotor learning.
J Exp Psychol Hum Percept Perform, 21(5), 1174-98.

Imamizu, H., & Shimojo, S. (1995).
The locus of visual-motor learning at the task or manipulator level: implications from intermanual transfer.
J Exp Psychol Hum Percept Perform, 21(4), 719-33.

Higuchi S., Chaminate T., Imamizu H. & Kawato M. (2009).
Shared neural correlates for language and tool use in Broca's area.  
NeuroReport, 20(15), 1376–81.   [PDF]

Higuchi S., Imamizu H. & Kawato M. (2007).
Cerebellar activity evoked by common tool-use execution and imagery tasks: an fMRI study.  
Cortex, 43(3), 350-358.   [PDF]

Milner T. E., Franklin D. W., Imamizu H. & Kawato M. (2007).
Central control of grasp: Manipulation of objects with complex and simple dynamics.  
NeuroImage, 36(2), 388-95   [PDF]

Ganesh G., Franklin D. W., Gassert R., Imamizu H. & Kawato M. (2007).
Accurate real-time feedback of surface EMG during fMRI.  
Journal of Neurophysiology, 97(1), 912-20. [PDF]

Bursztyn L. L., Ganesh G., Imamizu H., Kawato M. & Flanagan J. R. (2006).
Neural correlates of internal-model loading.  
Current Biology, 16(24), 2440-5. [PDF]

Milner T. E., Franklin D. W., Imamizu H. & Kawato M. (2006).
Central representation of dynamics when manipulating handheld objects.  
Journal of Neurophysiology, 95(2), 893-901. [PDF]

Schultz J., Imamizu H., Kawato M. & Frith C. D. (2004).
Activation of the human superior temporal gyrus during observation of goal attribution by intentional objects.  
Journal of Cognitive Neuroscience, 16(10), 1695-705. [PDF]

Haruno M., Kuroda T., Doya K., Toyama K., Kimura M., Samejima K., Imamizu H., & Kawato M. (2004).
A neural correlate of reward-based behavioral learning in caudate nucleus: a functional magnetic resonance imaging study of a stochastic decision task. 
Journal of Neuroscience, 24(7), 1660-5. [PDF]

Kawato M, Kuroda T, Imamizu H, Nakano E, Miyauchi S, & Yoshioka T. (2003).
Internal forward models in the cerebellum: fMRI study on grip force and load force coupling. 
Prog Brain Res., 142, 171-88. [PDF]

Miall, R.C., Reckess, G.Z. & Imamizu, H. (2001)
The cerebellum coordinates eye and hand tracking movements.
Nature Neuroscience, 4(6), 638-644

Miall, R.C., Imamizu, H., & Miyauchi, S.. (2000)
Activation of the cerebellum in co-ordinated eye and hand tracking movements: an fMRI study.
Exp Brain Res,135(1), 22-33.

Flanagan, J.R., Nakano, E., Imamizu, H., Osu, R., Yoshioka, T., & Kawato, M. (1999).
Composition and decomposition of internal models in motor learning under altered kinematic and dynamic environments.
The Journal of Neuroscience, 19(20):RC34:1-5. [full text]

Tamada, T., Miyauchi, S., Imamizu, H., Yoshioka, T., & Kawato, M. (1999).
Cerebro-cerebellar functional connectivity revead by the laterality index in tool-use learning.
  Neuroreport, 10(2), 325-31.

Itakura, S., & Imamizu, H. (1994).
An exploratory study of mirror-image shape discrimination in young children: vision and touch.
  Percept Mot Skills, 78(1), 83-8.

  Professional Affiliations

- The Japan Psychological Association
- Japan Society of Developmental Psychology
- Society for Neuroscience, USA

Address

Hiroshi Imamizu

Department of Cognitive Neuroscience
ATR Cognitve Mechanisms Laboratories
2-2-2 Hikaridai, Seika, Soraku, Kyoto, Japan 619-0288
Phone: +81 (0)774-95-1220
Fax: +81 (0)774-95-1236
http://www.cns.atr.jp/~imamizu
 
imamizu @ gmail.com / Last Revised Aug 19, 2014