The researchers, who detail their work in the August issue of the journal Archives of Surgery, suggest the personality type is linked with the body's immune system as well as stressresponsesystem.
Bipolar disorders also heighten the activity of the sympathetic nervous system, which sets off the fight-or-flight response to stress.
双相情感障碍也加强了交感神经系统的活动性，它对压力做出战斗-逃跑的反应。
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The finding also shows that the brain could increase the activity of the sympathetic nerves, the part of the nervous system involved in stressresponse.