There are four main symptoms of Narcolepsy. Those who suffer from it are often tired and may fall asleep during odd times, such as while driving. Cataplexy is the sudden and brief loss of muscle control. The person is fully awake and aware of what is happening. The attacks of cataplexy often occur in conjunction with the experience of strong emotions, such as anger or laughter.
Sleep paralysis involves the loss of muscle control when a person is waking up or falling asleep.
The person may be aware of what is occurring but unable to move or speak. Sometimes it will disappear if the person is touched by someone else. They may involve disturbing or frightening images or sounds. The person may fall asleep and continue to perform the task and not remember it upon awakening. Double vision Inability to concentrate The symptoms of Narcolepsy can develop gradually over time or appear suddenly.