Human behavior is distinguished by its complexity, from perception of the external world to awareness. This interaction ranging from the most primitive to the most evolved levels which characterizes us is the result of very complex chemical operations, which take place at the neuronal and interneuronal level. Through these courses we will explain to speech therapy students the basic principles of brain functioning: what is the neuron? what is neural network? We will also cover a summary of the most important neurotransmitters. Motivation, the starting point of our behavior. We hope that these courses will contribute to the training of future practitioners.