# 成癮的三大腦部機制為「親暱關係的回饋機制」類鴉片物質迴路、以多巴胺為基礎的「激勵─動機」迴路,並且前額葉皮質的自我調節中樞。這三大系統均透過環境進行微調,所有成癮者的這些系統失常程度不一,但都無法擺脫這些機制。成癮的第四大機制是「壓力─反應」機制,關乎腦部與身體之間的連結,這部分將於後續探討——《癮,駛往地獄的列車,該如何跳下?》
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