Category Internal Medicine

Sleep Disorders

Definition Sleep is an active state of decreased responsiveness during which multiple vital functions occur to promote higher cognitive functioning and overall good health. During this physiologic state, the brain restores several metabolic processes, clears waste products, and furthers synaptic…

The Epilepsies

Definition A seizure is defined by transient focal or generalized signs or symptoms due to abnormal excessive or synchronous neuronal activity in the brain. Focal seizures, which originate within neuronal networks limited to one cerebral hemisphere, produce signs and symptoms…

Headaches and Other Head Pain

Definition Headache, which is a very common symptom, can be secondary to an underlying abnormality but is usually a primary headache disorder such as migraine headache, tension-type headache, cluster headache, and paroxysmal hemicrania. Epidemiology About 90% of all adults experience…