Adaptation in natural and artificial systems
Adaptation in natural and artificial systems
Genetic Algorithms in Search, Optimization and Machine Learning
Genetic Algorithms in Search, Optimization and Machine Learning
Neural Networks: A Comprehensive Foundation
Neural Networks: A Comprehensive Foundation
From Embodied Cognitive Science To Synthetic Psychology
ICCI '02 Proceedings of the 1st IEEE International Conference on Cognitive Informatics
Computational theories on the function of theta oscillations
Biological Cybernetics
FROST: A Distributed Neurocomputational Model of Working Memory Maintenance
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
A Computational Study into the Evolution of Dual-Route Dynamics for Affective Processing
Journal of Cognitive Neuroscience
A Cortical Mechanism for Binding in Visual Working Memory
Journal of Cognitive Neuroscience
Hi-index | 0.00 |
LeDoux [LeDoux, J. E. The emotional brain. New York: Simon & Schuster, 1996] motivated the direct route in his dual-pathway model by arguing that the ability to switch rapidly between different modes of behavior is highly adaptive. This motivation was supported by evolutionary simulations [den Dulk, P., Heerebout, B. T., & Phaf, R. H. A computational study into the evolution of dual-route dynamics for affective processing. Journal of Cognitive Neuroscience,15, 194-208, 2003], in which foraging agents, controlled by simple inheritable neural networks, navigated an artificial world while avoiding predation. After many generations, a dual-processing architecture evolved that enabled a rapid switch to avoidance behavior when a predator appeared. We added recurrent connections to a new "context" layer in the indirect pathway to provide the agents with a working memory of previous input (i.e., a "context"). Unexpectedly, agents with oscillating networks emerged that had a much higher fitness than agents without oscillations. Oscillations seemed to have similar effects on switching speed as the dual-processing architecture, but they enhanced switching efficacy to a much larger degree. There has been much neurobiological speculation on the function, if any, of neural oscillations. These findings suggest that the facilitation of switching behavior is a likely candidate. Moreover, the strongly improved adaptation in the simulations contradicts the position that neural oscillations are merely a by-product of cell firing and have no functional value [Pareti, G., & De Palma, A. Does the brain oscillate? The dispute on neuronal synchronization. Neurological Sciences,25, 41-47, 2004].