Beyond strengthening connections between neurons, NMDA receptors amplify neural signals, much as transistors in old-style radios boosted weak radio signals into strong sounds.

• NMDA受体除了强化神经元之间的联系之外，还可以放大神经讯号，就像老式收音机里的电晶体将微弱的讯号放大成强力音响一样。