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news | June 05, 2026

How does cataplexy differ from narcolepsy?

Clinicians now recognize two major types of narcolepsy: narcolepsy with cataplexy (muscle weakness triggered by strong emotions) and narcolepsy without cataplexy. People who have narcolepsy without cataplexy have sleepiness but no emotionally triggered muscle weakness, and generally have less severe symptoms.

What is the difference between catalepsy and narcolepsy?

While cataplexy worsens with fatigue, it is different from narcoleptic sleep attacks and is usually, but not always, triggered by strong emotional reactions such as laughter, anger, surprise, awe, and embarrassment, or by sudden physical effort, especially if the person is caught off guard.

What exactly is cataplexy?

Sudden loss of muscle tone.

Cataplexy is uncontrollable and is triggered by intense emotions, usually positive ones such as laughter or excitement, but sometimes fear, surprise or anger. For example, when you laugh, your head may droop uncontrollably or your knees may suddenly buckle.

What is the difference between narcolepsy and?

Narcolepsy is a specific neurological disorder that causes sudden attacks of deep sleep, while hypersomnia is a symptom, and refers to excessive daytime sleepiness more generally. Hypersomnia, or hypersomnolence, is a symptom of narcolepsy.

Can you have cataplexy and not narcolepsy?

Yet, the most prevalent causes of cataplexy without narcolepsy are rare genetic diseases; which explains why cataplexy is classically linked to narcolepsy. Therefore, it is essential disconnecting cataplexy from narcolepsy especially in pediatric population and after use of a few medications.

40 related questions found

What mimics cataplexy?

Cataplexy mimics include syncope, epilepsy, hyperekplexia, drop attacks and pseudocataplexy. They can be differentiated from cataplexy using thorough history taking, supplemented with (home)video recordings whenever possible.

How do I know if I have cataplexy?

Cataplexy happens when your muscles suddenly go limp or significantly weaken without warning. You may experience cataplexy when you feel a strong emotion or emotional sensation. This can include crying, laughing, or feeling angry. You may find yourself falling over or losing control over your facial expressions.

How is narcolepsy with cataplexy similar to and different from REM sleep?

Some of the characteristics of narcolepsy — such as cataplexy, sleep paralysis and hallucinations — are similar to changes that occur in REM sleep, but instead, they occur during wakefulness or drowsiness.

Can insomnia cause cataplexy?

People with type 1 narcolepsy have very few of the nerve cells that produce orexin. The lack of this chemical leads to symptoms like daytime sleepiness and cataplexy. People with insomnia have too much orexin, which keeps them awake.

What is Type 1 narcolepsy with cataplexy?

Narcolepsy with cataplexy or narcolepsy type 1 in a rare, disabling sleep disorder, with a prevalence of 20 to 30 per 100,000. Its onset peaks in the second decade. The main features are excessive daytime sleepiness and cataplexy or sudden less of muscle tone triggered by emotional situations.

How is cataplexy related to narcolepsy?

How Is Cataplexy Related to Narcolepsy? Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness, sleep paralysis, hallucinations, and, in some cases, cataplexy. There are two major types of narcolepsy: type 1 and type 2 2, differentiated by whether or not a person experiences cataplexy.

What can cause cataplexy?

Cataplexy. This sudden loss of muscle tone while a person is awake leads to weakness and a loss of voluntary muscle control. It is often triggered by sudden, strong emotions such as laughter, fear, anger, stress, or excitement. The symptoms of cataplexy may appear weeks or even years after the onset of EDS.

Did Harriet Tubman have narcolepsy?

Early signs of her resistance to slavery and its abuses came at age twelve when she intervened to keep her master from beating an enslaved man who tried to escape. She was hit in the head with a two-pound weight, leaving her with a lifetime of severe headaches and narcolepsy.

Is cataplexy a neurological disorder?

Cataplexy is a brain disorder that causes a sudden and temporary loss of muscle tone and control, according to the National Institute of Neurological Disorders and Stroke (NINDS).

How do you stop cataplexy?

Cataplexy, hallucinations, disrupted nighttime sleep and sleep paralysis are often treated with two types of antidepressant medications: tricyclic antidepressants (TCAs) and selective serotonin reuptake inhibitors (SSRIs).

What is a hypocretin?

Hypocretin (also known as orexin) is a neuropeptide hormone produced in the hypothalamus that exerts important influences over sleep, arousal, appetite and energy expenditure. Defective hypocretin signalling is associated with narcolepsy.

What stage is deep sleep when it is difficult to wake you up?

Stage 3 / N3

Stage 3 sleep is also known as deep sleep, and it is harder to wake someone up if they are in this phase. Muscle tone, pulse, and breathing rate decrease in N3 sleep as the body relaxes even further.

Can you be narcoleptic and insomniac?

A person can have both narcolepsy and insomnia. While the two conditions represent opposite ends of the sleep disorder spectrum, a person with narcolepsy — who may experience extreme tiredness during the day — will also typically experience difficulties remaining asleep at night.

What can help cataplexy?

These older antidepressants, such as protriptyline (Vivactil), imipramine (Tofranil) and clomipramine (Anafranil), are effective for cataplexy, but many people complain of side effects, such as dry mouth and lightheadedness. Sodium oxybate (Xyrem). This medication is highly effective for cataplexy.

How do Dyssomnias differ from parasomnias?

Primary disorders can be divided into parasomnias and dyssomnias. Parasomnia sleep disorders cause abnormal activities during sleep, such as sleep terrors or sleep walking. Dyssomnia sleep disorders cause trouble falling asleep or staying asleep.

Why do I dream immediately after falling asleep?

In most people without narcolepsy, REM sleep is reached about 60 to 90 minutes after falling asleep8. During REM sleep there is increased brain activity, and vivid dreaming is common. REM sleep also involves a temporary muscle paralysis called atonia.

What are the 5 signs of narcolepsy?

There are 5 main symptoms of narcolepsy, referred to by the acronym CHESS (Cataplexy, Hallucinations, Excessive daytime sleepiness, Sleep paralysis, Sleep disruption). While all patients with narcolepsy experience excessive daytime sleepiness, they may not experience all 5 symptoms.

Is cataplexy a disability?

Your Legal Rights. Narcolepsy is a recognized disability under the Americans with Disabilities Act. Under this law, your employer must make reasonable accommodations, like letting you adjust your schedule or take brief rest breaks, to deal with your narcolepsy symptoms.

Can cataplexy look like a seizure?

The muscle twitching during cataplexy can look like a seizure. In fact, it's sometimes misdiagnosed as a seizure disorder.

Can you have cataplexy and not know it?

“Cataplexy can cause the head to bob or legs to give out while the patient is awake. Some people aren't even aware they experience it,” Berkowski says.