Understanding the model ...
The TAM-WG model, as its name suggests, reflects the integration of two other models, the Taxon-Affordances Model (TAM) and the World Graph (WG) model. The WG model by itself is composed of the allocentric motivational schema, the place cell model, and the world graph layer. TAM, besides implementing affordances for movement, is composed of the egocentric motivational schema. The egocentric and the allocentric motivational schemas are responsible for associating expectations of future reinforcement with spatial information in TAM and the WG model, which allows the animal to execute goal-oriented behaviors.
TAM-WG (Version 1.2) implements many different behavioral and electrophysiological experiments, which were originally described in:
Gothard, K. M., Skaggs, W. E., Moore, K. M.,
and McNaughton, B. L. (1996). Dynamics of mismatch correction in the hippocampal
ensemble code for space: Interaction between path integration and environmental
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Hirsh, R., Leber, B., and Gillman, K. (1978).
Fornix fibers and motivational states as controllers of behavior: A study
stimulated by the contextual retrieval theory. Behavioral Biology
22:463-478.
Hoffman, K. L., Gothard, K. M., Battaglia,
F., and McNaughton, B. L. (1998). Self motion updates the hippocampal population
code for place in the dark. Society for Neuroscience Abstracts,
24: 932.
O'Keefe, J. (1983) Spatial memory within and
without the hippocampal system. In W. Seifert (Ed.), Neurobiology of
the Hippocampus. New York, Academic Press. 375-403.
Morris, R. G. M. (1981). Spatial localization
does not require the presence of local cues. Learning and Motivation,
12: 239-260.
Packard, M. G., & McGaugh, J. L. (1996).
Inactivation of the hippocampus or caudate nucleus with lidocaine differentialy
affects expression of place and response learning. Neurobiology of Learning
and Memory, 65(1): 65-72.
Wilson, M. A., & McNaughton, B. L. (1993).
Dynamics of the hippocampal ensemble code for space. Science, 265(5172):
676-679.
All contents copyright (C) 1994-1999. University of Southern California Brain Simulation Lab All rights reserved.Author: Alex Guazzelli <aguazzel@rana.usc.edu>