<P> Catalepsy is a nervous disorder characterized by immobility and muscular rigidity, along with a decreased sensitivity to pain . Catalepsy is considered a symptom of serious diseases of the nervous system (e.g., Parkinson's disease, Epilepsy, etc .) rather than a disease by itself . Cataleptic fits can range in duration from several minutes to weeks . Catalepsy often responds to Benzodiazepines (e.g., Lorazepam) in pill & I.V. form . </P> <P> Major depressive disorder, otherwise known as depression, is a disorder that is characterized by a pervasive and persistent low mood that is accompanied by low self - esteem and by a loss of interest or pleasure in normally enjoyable activities . </P> <P> Encephalitis is an inflammation of the brain . It is usually caused by a foreign substance or a viral infection . Symptoms of this disease include headache, neck pain, drowsiness, nausea, and fever . If caused by the West Nile virus, it may be lethal to humans, as well as birds and horses . </P> <P> Epilepsy is an unpredictable, serious, and potentially fatal disorder of the nervous system, thought to be the result of faulty electrical activity in the brain . Epileptic seizures result from abnormal, excessive, or hypersynchronous neuronal activity in the brain . About 50 million people worldwide have epilepsy, and nearly 80% of epilepsy occurs in developing countries . Epilepsy becomes more common as people age . Onset of new cases occurs most frequently in infants and the elderly . Epileptic seizures may occur in recovering patients as a consequence of brain surgery . </P>

Infection of the central nervous system (cns) can cause hypoventilation or