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Related Experiment Video

Updated: Jul 2, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection
07:04

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Perseveration in left spatial neglect: drawing and cancellation tasks.

Roberta Ronchi1, Lucio Posteraro, Paola Fortis

  • 1Department of Psychology, University of Milano-Bicocca, Milano, Italy.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|August 19, 2008
PubMed
Summary

Right-brain-damaged patients with spatial neglect may exhibit perseveration errors in drawing and cancellation tasks. This perseveration is a distinct issue, potentially exacerbated by neglect but not directly correlated with its severity.

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Last Updated: Jul 2, 2026

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Perseveration is a common symptom in neurological disorders.
  • Unilateral spatial neglect (USN) is a frequent consequence of right-brain damage.
  • The relationship between perseveration and USN requires further clarification.

Purpose of the Study:

  • To investigate perseveration in target cancellation and drawing tasks in patients with right-brain damage.
  • To determine if perseveration is associated with the presence and severity of left visuo-spatial neglect.
  • To explore the cognitive underpinnings of perseveration in this patient group.

Main Methods:

  • Assessed 21 right-brain-damaged patients, categorizing them by the presence or absence of left visuo-spatial neglect.
  • Evaluated perseveration through target cancellation and drawing tasks (by copy and from memory).
  • Administered tests for executive functions (fluency, Stroop, sorting) and visuo-spatial short-term memory.

Main Results:

  • Eight neglect patients demonstrated perseveration in both cancellation and drawing tasks.
  • No significant correlation was found between perseveration and the severity of visuo-spatial neglect.
  • Patients with perseveration did not show disproportionate impairments in executive functions or visuo-spatial short-term memory.

Conclusions:

  • Graphic perseveration appears to be a specific disorder, particularly evident in serial graphic production tasks.
  • Unilateral spatial neglect may act as a trigger or facilitator for perseveration errors.
  • The severity of perseveration may increase contralaterally to the neglect.