Perseveration, severation, eration, ation

WESTBOROUGH, MA October 14, 2016 What does the term ‘to perseverate’ refer to in clinical terms.  The media attached below will illustrate the concept of perseveration in its clinical presentation. The patient was asked to copy her name.  A model was presented for her by the examiner. Most people have control over behavior through a series of feedback loops that become active in the brain that allow for anticipatory awareness and behavioral prospective as a person reaches full cognitive maturity.  Patients who are recovering from right hemisphere lesions often exhibit the pattern

perseveration_3scan
Patient asked to copy her name – Frances

of repetition without regard for how appropriate the pattern may be in respect to the task demand. You can see that the patient draws what appear to be tee pee shaped figures and two horizontal lines – perhaps a modified upper case A.  Meanwhile, she repeated the figure until she ran out of paper at the bottom margin.  In blogs already published I have mentioned the term perseveration and made an effort to illustrate its unusual presentation. One can see in the feature image a circular pattern of zeros as a patient attempted the clock drawing.  The patient got stuck making the number 0.  In the recent blog on this topic, I posted a video for the readers use that shows one case of perseveration in an older patient drawing circles over and over.

 

The term refers to the pattern of repeated motor movement in spite of the indication (or feedback) that the response is no longer needed or is inappropriate.  As you can see by this drawing the individual continued to make the same pattern over and over without regard for the task I had assigned – copy your name.

Treatment from serious stroke require months of cognitive rehabilitation in addition to physical and occupational therapy.  patients must be taught to recognize their cognitive vulnerability to errors like this.  As recovery is made most patients establish improved self-monitoring to compensate for their weaknesses. But some fail to re-establish the feedback loops and awareness that allow them to live in the world with the immediate awareness that once is enough and it is okay to stop.

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