Type 2 narcolepsy
The only definitive difference of type 2 narcolepsy is the
absence of cataplexy in patients. However, if the cataplexy develops it will be
reclassified to type 1 narcolepsy. Type 2 usually associates with less severe
symptoms with normal levels of hypocretin and the condition does not get triggered
by strong emotions.
The patients experience, daily, an incontrollable urge to
sleep during daytime. Even if patients feel refreshed from previous rest they
will feel fatigued after a short while.
According to international Classification of Sleep Disorders
(ICD-3), an average sleep is around 8 minute. The diagnosis of narcolepsy is Type
2 narcolepsy is present if the patient has been diagnosed with at least two sleep
SOREMPs, during multiple Sleep Latency Test (MSLT).
Both type 1 and type 2 narcolepsy may experience sleep
paralysis and hypnagogic hallucinations. The average sleep for both types are
around 8 hour during daytime. Although around 20% people with type 2 can sleep
for longer periods. They can be unaffected to traditional wake-promoting
Narcolepsy is a relatively rare disease which affects 19-56
per 100,000 people throughout Europe and USA. All four major symptoms are
experienced by only 20% of the sufferers.
The disease in various geographical areas, being less common
in Israel (1 in 500,000) and having higher sufferers in japan (1 in 600). Narcolepsy with cataplexy is commonly seen to
be present in patient in around 60-81%.
Narcolepsy UK research indicates that the condition affects
around 25,000 people. The study states this excessive daytime sleepiness can
cause up to 20% of roadside accident in UK.
The disease is neither gender of age specific. The first
signs of symptoms can normally be seen in teens to young adult. However,
narcolepsy can develop in children as young as 3 years old.
According to Minnesota County studies, estimates
that Type 1 narcolepsy is prevalent in 25-50 per 100,000 people. In contrast,
Type 2 has not been studied in-depth, but is expected lower than type 1; around
20-34 in 100,000