apathy AE HPO: HP_0000741 10002942 SIDER: C0085632 impassivity YH a behavior and neurological AE that has an outcome of apathy state perfunctoriness Apathy is a state of indifference, or the suppression of emotions such as concern, excitement, motivation and passion. An apathetic individual has an absence of interest or concern to emotional, social, or physical life. They may also exhibit an insensibility or sluggishness. behavioral and neurological AE