Neurochemistry is the study of Neurochemicals (neurotransmitters, neuropeptides) that have a direct impact on the functioning of the neuron. It also include the different chemical processes that occur in the brain.Neurotransmission is kind of signal transmission that involves neurotransmitters that are released by neuron, such as glutamate, aspartate, nitric oxide and dopamine which, further bind to a target receptor present on another neuron.