Unlike mammals, they only need their hypocretin system to regulate sleep at night.

与哺乳类不同，它们的增食欲素系统只需要在夜间管理睡眠。

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Narcolepsy is apparently caused by a genetic glitch that prevents the body from either absorbing or producing enough of the neurochemical hypocretin.

嗜睡症似乎是由基因遗传导致的，该遗传会是人体无法吸收或产生足够的神经下视丘分泌素。

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Narcolepsy is thought to be caused by a genetic glitch that prevents the body from either absorbing or producing enough of the neurochemical hypocretin.

据认为，阻止身体吸收或产生足够的影响神经系统的下丘脑分泌素的基因失灵引起嗜眠症。

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The hypocretin system is known to play a key role in controlling sleep and wakefulness.

BBC: NEWS | Health | Immune system link to narcolepsy

He said narcolepsy was linked to a loss of a particular type of brain cell called a hypocretin neuron.

BBC: NEWS | Health | Immune system link to narcolepsy

It could pave the way for a new test to identify people at risk, so action could be taken to prevent the loss of hypocretin neurons before they fell to a level low enough to trigger narcolepsy symptoms.

BBC: NEWS | Health | Immune system link to narcolepsy