Disordered formal thought process Perseverative thought UMLS:C0233651 Perseveration Perseverative behaviour A description of an individual who displayed perseveration following a hemispheric stroke is the following. The individual displayed the three primary forms of perseveration (stuck-in-set, continuous, and recurrent; for definitions), and these forms occurred on various tasks and modalities. He often pointed to the same (incorrect) items on an auditory comprehension test, whereas on writing tasks he repeated letters and words. In drawing, elements of one drawing would be carried over to other drawings. Mental states which are slow to change are perseverative, while those which are demanding or intrusive could be described as stereotyped. The repetitive production of the same response to different commands. Perseverative behavior SNOMEDCT_US:44515000