Brain scans revealed that neural areas linked with responses to pain, stress, rewards and emotion released endorphins, natural analgesics that behave like opiates.

• 受试者的脑部扫描记录显示，与疼痛、压力、奖赏、情感反应有关的神经区域，释放出天然的止痛剂脑内啡，作用类似鸦片。