They are the “ seeking ” or “ reward ” system ( which motivates the pursuit of pleasure ) ; the “ anger - rage ” system ( which governs angry aggression but not predatory aggression ) ; the “ fear - anxiety ” system ; and the “ panic ” system ( which includes complex instincts such as those that govern social bonding ) 这四种是追求或报偿系统（会趋使追求快乐） ；愤怒?暴怒系统（控制愤怒性的攻击而非掠食性的攻击） ；恐惧?焦虑系统；以及恐慌系统（包括控制社会关系的复杂本能） 。
