For a long time most psychologists understood PTSD through the lens of fear conditioning or the unshakable memory of being in mortal danger and the learned responses that stem from that memory.

很长一段时间以来，大多数心理学家通过恐惧条件反射或处于致命危险中的不可动摇的记忆以及源于该记忆的习得反应来理解创伤后应激障碍。