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。
Narcolepsy is apparently caused by a genetic glitch that prevents the body from either absorbing or producing enough of the neurochemical hypocretin.
如果是因为激素缺少而不是肾小管对这种激素没有反应的话，可注射血管加压素的生物制剂或化学合成制剂来治疗。下视丘的病变也会造成尿崩症。
Injections of synthetic vasopressin are effective if the hormone is lacking but not if the response is absent. disorders of the hypothalamus are one cause of diabetes insipid us.
血清素系强力血管收缩剂，也是一种神经介质，集中在脑内某些部分，特别是中脑和下视丘。
A strong stimulator of blood-vessel constriction and a neurotransmitter, serotonin concentrates in certain brain areas, especially the midbrain and hypothalamus.
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