Neurology is the branch of medicine concerned with the study and treatment of disorders of the nervous system. The nervous system is a complex, sophisticated system that regulates and coordinates body activities. It has two major divisions:

• Central nervous system: the brain and spinal cord
• Peripheral nervous system: all other neural elements, such as eyes, ears, skin, and other “sensory receptors”.

A doctor who specializes in neurology is called a neurologist. The neurologist treats disorders that affect the brain, spinal cord, and nerves, such as:

• Cerebrovascular disease, such as stroke
• Demyelinating diseases of the central nervous system, such as multiple sclerosis
• Headache disorders
• Infections of the brain and peripheral nervous system
• Movement disorders, such as Parkinson’s disease
• Neurodegenerative disorders, such as Alzheimer’s disease, Parkinson’s disease, and Amyotrophic Lateral Sclerosis (Lou Gehrig’s disease)
• Seizure disorders, such as epilepsy
• Spinal cord disorders
• Speech and language disorders

Neurologists do not perform surgery. If one of their patients requires surgery, they refer them to a neurosurgeon.