In-depth

Absence seizure

Absence (petit mal) seizures typically last only a few seconds, but can occur hundreds of times a day.

Amnesia

Amnesia is much more common in fictional characters than in real people. Causes include stroke, brain inflammation and alcoholism.

Cerebral palsy

Cerebral palsy — Comprehensive overview covers symptoms, causes and treatment of this movement disorder.

Childhood schizophrenia

Childhood schizophrenia is confusing and heart wrenching. Learn about managing this serious psychotic disorder.

Chronic daily headaches

Chronic daily headaches strike nearly every day. Aggressive initial treatment and steady, long-term management can help reduce pain and lead to fewer headaches.

Coma

Coma is often a complication from a severe brain injury that leaves a person unconscious and unresponsive. Many people recover from this condition.

Conversion disorder

Conversion disorder occurs when your response to stress shows up as seizures, paralysis or another physical symptom.

Creutzfeldt-Jakob disease

Creutzfeldt-Jakob disease is a rare cause of dementia that progresses rapidly once symptoms develop.

Dementia

Dementia — Comprehensive overview covers symptoms, causes and treatments of this mental deterioration.

Dysarthria

Dysarthria is a speech disorder caused by an inability to control or coordinate the muscles used for speaking.

Encephalitis

Encephalitis is inflammation of the brain usually caused by a viral infection. Severe cases can cause brain damage, even death.

Epilepsy

Epilepsy disrupts the normal electrical activity inside your brain. Symptoms and causes can vary, but medication is usually very effective.

Febrile seizure

Although febrile seizures can be frightening for parents and children, they're generally harmless. Most occur after a sudden fever spike, usually due to an infection.

Frontal lobe seizures

Frontal lobe seizures can produce many odd behaviors, including bicycle pedaling motions and pelvic thrusting. Seizures often occur during sleep.

Grand mal seizure

A grand mal seizure is characterized by loss of consciousness and convulsions.

Huntington's disease

Huntington's disease — an inherited disease that causes the degeneration of brain cells — results in movement, psychiatric, cognitive disorders and eventual death.

Intermittent explosive disorder

Intermittent explosive disorder involves aggressive, violent behavior that's out of proportion to what triggered the behavior. Episodes may be separated by long periods of time.

Lewy body dementia

This type of dementia often causes hallucinations, delusions and fluctuating alertness.

Long QT syndrome

Long QT syndrome is an electrical disturbance that can cause sudden, rapid heart rates. It can be genetic or a side effect of medication.

Myoclonus

Myoclonus refers to involuntary muscle jerks. Examples range from simple hiccups to the jerking movements common in epileptic seizures or cognitive disorders.

Restless legs syndrome

Do you feel a creepy, crawly sensation in your legs after sitting for long periods or lying down at night? You could have restless legs syndrome.

Rett syndrome

Parenting a child with Rett syndrome can be challenging. Here's what to expect and steps you can take to help your child.

Temporal lobe seizure

Temporal lobe seizures can cause various symptoms and a momentary loss of awareness. Medication controls most cases, but for some, surgery may be an option.

Transient global amnesia

Imagine having no moment-to-moment memory — no recall of what you just did. That's the essence of transient global amnesia. Fortunately, it's rare and temporary.

Tuberous sclerosis

Tuberous sclerosis is a rare genetic disease. With appropriate treatment, many people who have tuberous sclerosis lead full, productive lives.

West Nile virus

West Nile virus infection usually resolves on its own, but occasionally it can be serious.

May. 19, 2011