ORBÁN, Gergő

Name: Gergő Orbán, Ph.D.
Address: Dept. Biophysics, KFKI RIPNP of the HAS, Konkoly-Thege M. út 29-33, Budapest, H-1121, Hungary
Office: KFKI Campus, Building 13, Floor 1, Room 3.
E-mail: ogergo at sunserv dot kfki dot hu
Phone: +36 1 392 2222 x3257
Fax: +36 1 392 2742

Current address: Fiser Lab, Volen Center for Complex Systems & Department of Psychology, Brandeis University
Current webpage: http://people.brandeis.edu/~ogergo/

Position: Research fellow

Research interests
My research interests lie predominantly in the topics of neural coding, representation of information in the brain, and information processing in neural systems. My current research focus is on how a neural circuit extracts “general” or abstract rules from the finite set and often ambiguous sequences of stimuli. More specifically, my current field of interest is the acquisition of syntactic
rules of language. Outstanding questions of my research are: How inference in a neural network can be tallied with the anatomical structure of cortical areas and performance of neurons in psychophysical tasks? If inference is not optimal in a Bayesian sense, how much the inference realized by neurons can deviate from the optimal one to retain a performance level measured in psychophysical experiments? My long term research goal is understanding the difference between the performance of humans and primates in tasks related to syntactic operations.

Publications:

  • J. Fiser, P. Berkes , G. Orbán, M. Lengyel (2010) Statistically optimal perception and learning: 
from behavior to neural representations, Accepted
  • G. Orban, J. Fiser, R.N. Aslin, M. Lengyel (2008) Bayesian learning of visual chunks by human observers. Proceedings of the National Academy of Sciences, 105: 2745–50.
  • E. Szathmary, Z. Szatmary, P. Ittzes, G. Orban, I. Zachar, F. Huszar, A. Fedor, M. Varga, Sz. Szamado (2007) In silico evolutionary developmental neurobiology and the origin of natural language. In: Lyon, C. and Nehaniv, C. L. and Cangelosi, A. (Eds) Emergence of Communication and Language. Springer-Verlag. London pp. 151 – 187.
  • B. Ujfalusy, T. Kiss, G. Orban, P. Erdi, W.E. Hoffmann, M Ha jos (2007) Pharmacological and computational analysis of alpha-subunit preferential GABA(A) positive allosteric modulators on the rat septo-hippocampal activity. Neuropharmacology, 52:733–43.
  • G. Orban, T. Kiss, P. Erdi (2006) Intrinsic and synaptic mechanisms determining the timing of neuron population activity during hippocampal theta oscillation Journal of Neurophysiology, 96:2889–904.
  • G. Orbaan, J. Fiser, R.N. Aslin, M. Lengyel (2006) Bayesian model learning in human visual perception. Advances in Neural Information Processing Systems 18, Eds Y Weiss, B Sch ̈olkopf, and J. Platt. pp. 1043-1050. MIT Press, Cambridge, MA.
  • G. Orban, J. Fiser, R.N. Aslin, M. Lengyel (2006) Learning Objects by Learning Models: Finding Independent Causes and Preferring Simplicity. Proceedings of the 28th Annual Conference of the Cognitive Science Society. pp 645-650, Sheridan Publishing.
  • Zs. Huhn, M. Lengyel, G. Orbán, P. Érdi (2005) Dendritic spiking accounts for rate and phase coding in a biophysical model of a hippocampal place cell. Neurocomputing, 65-66: 331-341
  • Zs Huhn, G. Orbán, P. Érdi, M. Lengyel (2005) Theta oscillation-coupled dendritic spiking integrates inputs on a long time scale. Hippocampus. 2005;15(7):950-62.
  • M. Hajós, W.E. Hoffmann, G. Orbán, T. Kiss, P. Érdi (2004) Modulation of septo-hippocampal theta activity by GABAA receptors: an experimental and computational approach. Neuroscience, 126: 599-610.
  • G. Orbán, T. Kiss, M. Lengyel, P. Érdi (2001) Gamma-related theta-frequency resonance in CA3 interneurons. Biological Cybernetics, 84: 123-132.
  • T. Kiss, G. Orbán, M. Lengyel, P. Érdi (2001) Intrahippocampal gamma and theta rhythm generation in a network model of inhibitory interneurons. Neurocomputing, 38-40: 713-719.
Born: 29 May, 1977 in Budapest, Hungary