What Are the Signs and Symptoms of Narcolepsy?
The major symptom of narcolepsy is excessive daytime
sleepiness with sleep attacks. People with narcolepsy may also have one or more
of the following signs and symptoms:
- Sudden loss of muscle tone and control (muscle
weakness) over parts or all of the body while awake (cataplexy)
- Sudden inability to move or speak while falling
asleep or waking up (sleep paralysis)
- Vivid dreams while falling asleep or waking up
(hallucinations)
Daytime Sleepiness
All people with narcolepsy have excessive daytime
sleepiness. This is usually the first symptom of the condition. They also may
have sudden, irresistible urges to sleep during the day (sleep attacks). They
usually fall asleep for just a few seconds or minutes. Rarely, they may fall
asleep for as long as an hour or more. Daytime sleepiness can cause:
- Mental cloudiness or fog
- Memory problems
- Problems focusing
- Lack of energy
- Depression
- Extreme exhaustion
Cataplexy
Nearly 3 out of 4 people with narcolepsy (75
percent) experience sudden muscle weakness while they are awake. This is called
cataplexy, and it is similar to the paralysis that occurs during dream sleep.
Mild attacks of muscle weakness can cause:
- Head nodding
- Drooping eyelids
- Difficulty speaking
- Difficulty moving arms or hands or a weakened
grip
- Buckling of the knees
Severe attacks of narcolepsy may cause complete
paralysis and falls. Attacks often last less than 2 minutes, and they may only
last a few seconds. During both mild and severe attacks, the person stays fully
conscious.
The sudden attacks of muscle weakness in narcolepsy
can happen at any time. But these attacks are often triggered by strong
emotions, including:
- Laughter
- Anger
- Fear
- Excitement
Attacks of muscle weakness and tone are sometimes
the first symptom of narcolepsy that is noticed. But usually this symptom
occurs weeks or months after people who have narcolepsy first start to
experience excessive sleepiness during the day.
Sleep Paralysis
People with narcolepsy may suddenly not be able to
move or speak while falling asleep or waking up. They are fully conscious
during these periods of sleep paralysis. The paralysis usually lasts just a few
seconds or minutes, but it can be scary. Sleep paralysis is similar to the
paralysis that happens in rapid eye movement (REM) sleep. Not all people with
narcolepsy have sleep paralysis.
Hallucinations
Some people with narcolepsy have vivid dreams while
they are falling asleep, waking up, or dozing. These hallucinations differ from
normal dreams because they seem very real and include sights, sounds, smells,
tastes, and touch. People with narcolepsy may say these hallucinations are
scary like a nightmare. The hallucinations can occur with sleep paralysis.
Other Symptoms
Some people with narcolepsy have difficulty staying
asleep through the night. These frequent awakenings may start years after
experiencing the first symptoms of narcolepsy. Another symptom of narcolepsy is
to carry out certain actions without awareness. This is called automatic
behavior. For example, if people with this symptom are writing, they may
scribble rather than form words. When driving, people with automatic behavior
may get lost or have an accident because of periods when they arent aware
of what they are doing. People usually do not remember such automatic
behavior. |