(from the Latin persevero to persist, to continue) is a stable obsessive repetition of a mental, emotional or motor act. Most often, perseveration is a symptom of a mental disorder, but it can also be observed in healthy people in a state of strong emotional stress. Perseverative thinking is characterized by constant thinking about one idea without developing it; emotional perseverations are realized by “getting stuck” on the experience of a certain emotion; Perseverative motor skills are repeated reproduction of one movement or motor complex. In speech perseveration, there is an involuntary repetition of a word or phrase.