Abstract
It is thought that the amygdala and the orbitofrontal cortex are
involved in learning and memory systems and that groups of cholinergic
and adrenergic neurons may function as modulators in the activity of
those systems 9. It is also believed that association learning is
very important in the control of motivational and emotional behaviours
8. Furthermore, it has been suggested that neurons involved in
homeostatic regulation mechanisms (evolutionarily old structures in the
brain) are related to neocortical neurons (evolutionarily modern
sectors) via emotion 3. On the other hand. modularity has been often
considered in systems simulating brain activity 5, 1. In this work,
we propose a modular system with a particular module able to evaluate
some variables reflecting the own system functions, in order to simulate
internal states. According to that, this module has a modulatory role on
the other modules' computations. Our aim is to show the properties of
the system proposed under the influence of this particular module.
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