Additional neural circuits that are superimposed on this system have the potential to override the homeostatic signals, resulting in either gluttony or anorexia at the extremes.

• 另外的神经元回路在此基础之上，有打破这种自我平衡信号的潜能，引起贪食或厌食的极端情况。中脑多巴胺神经元已经长期被认为参与奖赏行为和摄食行为动机的调节。