Stories We Like: A Guide to the Comma
early 15c., "duration, quality of persisting; will to persevere," from Old French perseveracion "persistence, stubbornness" (13c.) and directly, from Latin perseverationem (nominative perseveratio), noun of action from past participle stem of perseverare (see persevere). Psychological sense (1915) is from German.
perseveration per·sev·er·a·tion (pər-sěv'ə-rā'shən)
Uncontrollable repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of a stimulus, usually caused by brain injury or other organic disorder.
The tendency to continue or repeat an act or activity after the cessation of the original stimulus.