obsessional idea

… Disorders of thought content include dominant ideas, obsessions, and delusions. Overdetermined ideas, also called controlling ideas, are ideas that are strongly supported by emotions and that continuously dominate a person's thoughts and actions. Obsessional ideas are ideas that are held captive by a particular idea and cannot be released from it, even though the person is aware of its irrationality. Delusions are pathological convictions of things that should not exist and cannot be corrected even by persuasion from those around them. Obsessions are seen in obsessive-compulsive disorder, depression, and schizophrenia, while delusions are seen in schizophrenia, paranoia, drug addiction, etc. …

*Some explanations of terms that mention "obsessional idea" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　思考内容の障害には，優格観念，強迫観念，妄想がある。優格観念overdetermined ideaとは支配観念ともいい，感情に強く裏づけられた観念で，その人の思考や行動を持続的に支配するもの，強迫観念obsessional ideaとはその不合理性を自覚しながらも特定の観念にとらわれて離れることができぬもの，妄想とはありうべからざることを病的に確信し，周囲からの説得によっても訂正不能なものをいう。強迫観念は強迫神経症，鬱（うつ）病，精神分裂病に，妄想は精神分裂病，妄想病，薬物依存などに認められる。…

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出典｜株式会社平凡社世界大百科事典 第２版について | 情報