Hartmann E, Elion R
Psychopharmacology (Berl). 1977 Jul 18;53(2):131-3. doi: 10.1007/BF00426482.
Forty-two normal human subjects were studied in the sleep laboratory for one night each. Fourteen were given placebo at bedtime, 14 took l-tryptophane 1 g, and 14 took l-tryptophane 3 g. Both tryptophane groups had significantly lower sleep latency than the placebo group. The usually discarded 'first laboratory night' produces a mild situational insomnia in normal persons and thus can be useful in certain sleep studies.
42名正常受试者在睡眠实验室各接受了一晚的研究。14人在睡前服用安慰剂，14人服用1克L-色氨酸，14人服用3克L-色氨酸。两个色氨酸组的睡眠潜伏期均显著低于安慰剂组。通常被舍弃的“第一个实验室夜晚”会在正常人中产生轻度情境性失眠，因此在某些睡眠研究中可能有用。
