Neurochemistry is the specific study of neurochemicals, including neurotransmitters and other molecules (such as psychopharmaceuticals, neuropeptides, or gastrotransmitters) that influence the function of neurons. This field closely examines how these neurochemicals influence the network of neural operation. This evolving area of neuroscience offers a neurochemist a micro-macro connection between the analysis of organic compounds active in the nervous system and neural processes such as cortical plasticity, neurogenesis and neural differentiation.