| Caption | a) The synapses, which are based on a neuron in the brain, are excitatory or inhibitory depending on the neurotransmitter released (Storti Gajani 1982); b) Example of a three-layer ANNs in which input neurons (bottom left) elaborate a configuration of activations (bottom right) and transmit to one hidden layer (centre) on the basis of synaptic connections weighed. Hidden layer elements sum the inputs and produce a new configuration of activations (above) which is determined by the intensity of the connections between neurons (Churchland, Churchland 1982). |
