Neurology
Neurology is the medical specialty focused on the brain, spinal cord, peripheral nerves, muscles, sensation, movement, cognition, seizures, stroke, headache, neurodegenerative disease, testing, treatment, and rehabilitation.
What neurology is
Neurology is the branch of medicine focused on the nervous system. Neurologists diagnose and treat problems involving the brain, spinal cord, nerves, neuromuscular junction, and muscles. The field connects bedside examination with anatomy, physiology, imaging, genetics, emergency care, rehabilitation, psychiatry, and long-term disease management.
The nervous system
The nervous system controls movement, sensation, balance, speech, vision, memory, attention, pain, sleep, autonomic function, and many reflexes. The central nervous system includes the brain and spinal cord. The peripheral nervous system includes nerves that carry signals between the body and the central nervous system. Small changes in location can produce very different symptoms, so neurology pays close attention to where a problem is likely happening.
The neurological examination
A neurological examination tests mental status, cranial nerves, strength, sensation, coordination, reflexes, gait, balance, speech, and sometimes vision or autonomic signs. The exam helps localize disease before testing begins. For example, weakness from a brain stroke, spinal cord compression, peripheral nerve injury, muscle disease, or neuromuscular junction disorder can look similar at first but require very different responses.
Symptoms and urgent clues
Neurological symptoms can be sudden, gradual, intermittent, or progressive. Sudden face droop, arm weakness, speech trouble, vision loss, severe new headache, seizure, confusion, or loss of consciousness may be urgent. Other symptoms, such as numbness, tremor, memory change, dizziness, walking trouble, pain, or fatigue, may need careful pattern recognition and follow-up.
Testing and imaging
MRI and CT can show stroke, bleeding, tumors, inflammation, injury, spinal compression, and structural disease. EEG records electrical activity and can help evaluate seizures. EMG and nerve conduction studies test muscles and peripheral nerves. Lumbar puncture can sample cerebrospinal fluid. Blood tests may check infection, inflammation, autoimmune disease, vitamin deficiency, toxins, genetics, or metabolic causes.
Conditions it covers
Neurology covers stroke, epilepsy, migraine and other headache disorders, multiple sclerosis, Parkinson disease and other movement disorders, dementia, neuropathy, neuromuscular disease, spinal cord disorders, traumatic brain injury, sleep-related neurological problems, neurogenetic disease, infections of the nervous system, and complications of cancer, immune disease, or metabolic disease. Some conditions are emergencies; others unfold over years.
Treatment and rehabilitation
Treatment may include medicines, lifestyle changes, risk-factor control, procedures, devices, immune therapies, seizure plans, headache prevention, stroke prevention, botulinum toxin injections, rehabilitation, speech therapy, occupational therapy, physical therapy, counseling, and care coordination. Neurology often focuses on function: walking, speaking, swallowing, thinking, working, sleeping, and staying safe.
Why it matters
Neurological disease can affect identity, independence, movement, communication, memory, sensation, and survival. Fast recognition can prevent disability in conditions such as stroke or meningitis, while long-term care can improve daily life for chronic disease. Neurology matters because the nervous system is both the control network of the body and the basis of much of human experience.