NEURAL NETWORKS AND FUZZY LOGIC IN MEDICINE

Error back propagation algorithm, generalized delta rule.
INTRODUCTION
Neural networks are members of a family of computational architectures inspired by biological brains. Traditionally a neuron operates by receiving signals from other neurons through connections, called synapses. The combination of these signals, in excess of a certain threshold or activation level, will result in the neuron firing, i.e sending a signal to other neurons connected to it. Some signals act as excitations and others as inhibitions to a neuron firing which is the collective effect of the presence or absence of firings in the pattern of synaptic connections between neurons. Figure 1 shows the biological neuron.