Source:http://linkedlifedata.com/resource/umls/id/C0026605
MSH: Those factors which cause an organism to behave or act in either a goal-seeking or satisfying manner. They may be influenced by physiological drives or by external stimuli.,CSP: mental process which causes organisms to seek a goal or satisfy a need; e.g., hunger, thirst, sex drive, etc.,NCI: The psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior.