PET scans map the brain's blood flow and metabolic activities, giving a clear picture of its biological functioning. PET scans are non-invasive, painless and safe. Secondary - Due to some other disorder. For example, a secondary dystonia is a symptom of some other disorder. Seizure - a disturbance of the brain's normal electrical activity, causing a temporary change in behavior, consciousness, bodily movements or sensation.
Seizures are the main symptom of epilepsy, but can be caused by a wide variety of conditions.
An unwanted effect of drug therapy. Side effects are generally predictable. The temporary inability to move when dropping off to sleep or after waking up. Tacrine - A drug that may temporarily improve memory loss in some patients with mild to moderate Alzheimer's. Thalamus - A part of the brain that controls movement.