Neuroscience is an interdisciplinary science devoted to the study of the nervous system's structure and function. It includes computational, behavioural, and cognitive neuroscience, as well as evolution, development, cellular and molecular biology, physiology, anatomy, and pharmacology of the nervous system. Neuroscientists study the brain and how it affects people's behaviour and cognitive functions, or how they think. They also look into what occurs to people's nervous system when they suffer from neurological, psychiatric, or neurodevelopmental diseases. From neuroanatomy to neuropsychology, a neuroscientist might specialise in a variety of subjects.