Neuroscience is the scientific study of the nervous system, encompassing its structure, function, development, and disorders. It is a multidisciplinary field that integrates physiology, anatomy, molecular biology, psychology, physics, computer science, and more to understand the properties of neurons, glia, and neural circuits. Neuroscience seeks to understand the biological basis of behavior, learning, memory, perception, and consciousness. Neuroscientists examine the impact of the brain on cognitive functions and investigate what happens to the nervous system during neurological, psychiatric, and neurodevelopmental disorders.
The scope of neuroscience has broadened to include various approaches, from molecular and cellular studies to the imaging of sensory, motor, and cognitive functions in the brain. Key areas within neuroscience include behavioral, cellular, clinical, cognitive, computational, and social neuroscience. Neuroscience has implications for understanding and treating a wide range of conditions, including Alzheimer's disease, Parkinson's disease, stroke, and multiple sclerosis. Recent developments in brain scanning provide detailed images, helping researchers determine how damage affects motor skills and cognitive behavior. The human brain contains approximately 86 billion neurons, each capable of forming thousands of connections, resulting in a complex network that underlies all thoughts, feelings, and behaviors.