Brain and Nervous System Medical Reference

Powassan is a tick-borne illness that causes swelling in the brain and spinal cord. It used to be rare, but cases could be on the rise.

Thanks to technology, social services and other support, people who have cerebral palsy (CP) have better chances than ever to lead independent, fulfilling lives as adults.

WebMD explains the liquid that protects your brain and what kind of powerful clues it can give your doctor.

The experts at WebMD explain sound therapy, how it works, and whether it might be right for you.

If you're very sensitive to certain everyday sounds, you may have a condition called hyperacusis. WebMD explains what you need to know about this hearing disorder and how to get help.

If you have vertigo or trouble hearing, your body’s balance system might be off kilter.

A brain aneurysm is a bulge that forms in the blood vessel of your brain that could lead to severe health issues and possibly death. But most brain aneurysms don’t cause any symptoms, and only a small percentage of them result in health problems.

The spinning sensation and dizziness you get from vertigo can limit your activities and make you feel sick. Learn some simple maneuvers you can do at home that might bring relief, depending on the cause.

Sudden memory loss isn't always a sign of Alzheimer's or other types of dementia. Learn what other conditions can affect your memory -- and how to treat them.

If you’re dizzy and your ears are ringing, you might have Ménière’s Disease. Learn how it progresses and how you can manage it.

Electronystagmography, or ENG, is a series of tests that can help your doctor figure out the causes of your vertigo. Read about what to expect from an ENG procedure.

Are your muscles sore, weak, or numb? An EMG or a nerve conduction study may help you find out why.

Do you wake up dizzy or wobble when you turn your head? You might have benign paroxysmal positional vertigo. Learn more about BPPV, what causes it, and what you can do about.

Is memory or decision-making a problem for you? Neuropsychological tests may help your doctor figure out the cause.

Bell’s palsy is a condition where one side of your face droops or feels weak. Symptoms come on suddenly. WebMD explains how it’s diagnosed and treated.

Bell’s palsy can cause drooping or weakness on one side of your face. You might think it’s a stroke, but it’s not. WebMD explains the signs and symptoms of this condition.

What Are the Symptoms of Bell’s Palsy?

ALS, or Lou Gehrig's disease, is the most common type of motor neuron disease. Learn about the other types, and how they can affect your muscles.

Do you feel dizzy time to time and wonder why it’s happening? Learn about the things that can cause dizziness, from anxiety to positional vertigo.

The symptoms of ALS can overlap with other disorders. With the right exams and tests, doctors can do a diagnosis and figure out whether you have amyotrophic lateral sclerosis or something else.

People with ALS need a lot of help with daily activities. If you're an ALS caregiver, learn how to help yourself and avoid burnout.

Feeling dizzy or hard of hearing? You may have symptoms of labyrinthitis. WebMD explains what this condition is and how it’s treated.

If you've been diagnosed with ALS, learn what to expect and how to help yourself have the best possible outlook.

How is ALS treated? Mostly by managing the symptoms. Learn more about how to help someone with the condition also called Lou Gehrig’s disease.

Without knowing what causes ALS, it’s difficult to tell why some people develop the disease while others do not. Risk factors may be genetic and related to environmental factors.