ABSTRACT
Plasticity shows that everything is inscribed, that experience leaves a trace, and that this trace is determinative. The mechanism of plasticity in a temporal sequence of the diachronic process of becoming reworks the neural circuits in such a way that an identical stimulus can give variable responses. Plasticity thus introduces a degree of variability in the responses, which distances the neural network from the univocal, determined response we would find in a rigid system fixed in time. The very phenomenon of plasticity, in any case, requires us to think in terms of complexity resulting from a determination of variability, or, in other words, a determination of randomness. In combination with plasticity, diachrony thus establishes an important degree of variability in a system that, in the absence of plasticity, would function deterministically. The diachrony of the unpredictable event is caught up in the synchrony of the structure of the fantasy.
