Neuroscience is the interdisciplinary study of the nervous system, focusing on how the brain, spinal cord, and neural networks function to regulate behavior, cognition, and bodily processes. It combines biology, psychology, medicine, and computational sciences to explore brain structure, neural pathways, and the mechanisms behind thoughts, emotions, and decision-making. Key branches of neuroscience include cognitive neuroscience, which studies memory and perception, molecular neuroscience, which examines neurons and neurotransmitters, and clinical neuroscience, which focuses on neurological disorders like Alzheimer's and Parkinson's disease. Advances in computational neuroscience and artificial intelligence have further enhanced our understanding of neural networks and brain function.