Around the clock surveillance: Simple graphic disturbance in patients with hemispatial neglect carries implications for the clock drawing task

A.D. Smith, I.D. Gilchrist, S.H. Butler, M. Harvey

Research output: Contribution to journalArticle

11 Citations (Scopus)
61 Downloads (Pure)

Abstract

Background: Drawing, and the clock drawing task in particular, is widely used as a diagnostic tool in the study of hemispatial neglect. It is generally assumed that the errors in graphic production, such as the misplacement of numbers, reflect a visuospatial deficit, and that drawing production itself (for example, producing the circle) is unimpaired. Objectives: To test this assumption by examining whether the production of simple circles is affected by neglect. Methods: 16 right hemisphere stroke patients copied circles of various sizes and their drawings were measured for size accuracy. Results: Patients with more severe neglect produced greater scaling errors, consistently drawing the circle smaller than the original. Errors were not in the horizontal axis alone-shrinkage occurred equally in both height and width axes. Conclusions: Neglect can co-occur with constructional difficulties that serve to exacerbate the symptoms presented. This should be taken into account in the assessment of even apparently simple drawing tasks.
Original languageEnglish
Pages (from-to)407-409
Number of pages3
JournalJournal of Neurology, Neurosurgery and Psychiatry
Volume77
Issue number3
DOIs
Publication statusPublished - Mar 2006

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Perceptual Disorders
Stroke
Surveillance
Clock
Neglect

Keywords

  • alzheimers
  • graphic disturbance
  • patients
  • hemispatial neglect
  • clock drawing task

Cite this

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title = "Around the clock surveillance: Simple graphic disturbance in patients with hemispatial neglect carries implications for the clock drawing task",
abstract = "Background: Drawing, and the clock drawing task in particular, is widely used as a diagnostic tool in the study of hemispatial neglect. It is generally assumed that the errors in graphic production, such as the misplacement of numbers, reflect a visuospatial deficit, and that drawing production itself (for example, producing the circle) is unimpaired. Objectives: To test this assumption by examining whether the production of simple circles is affected by neglect. Methods: 16 right hemisphere stroke patients copied circles of various sizes and their drawings were measured for size accuracy. Results: Patients with more severe neglect produced greater scaling errors, consistently drawing the circle smaller than the original. Errors were not in the horizontal axis alone-shrinkage occurred equally in both height and width axes. Conclusions: Neglect can co-occur with constructional difficulties that serve to exacerbate the symptoms presented. This should be taken into account in the assessment of even apparently simple drawing tasks.",
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Around the clock surveillance : Simple graphic disturbance in patients with hemispatial neglect carries implications for the clock drawing task. / Smith, A.D.; Gilchrist, I.D.; Butler, S.H.; Harvey, M.

In: Journal of Neurology, Neurosurgery and Psychiatry, Vol. 77, No. 3, 03.2006, p. 407-409.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Around the clock surveillance

T2 - Simple graphic disturbance in patients with hemispatial neglect carries implications for the clock drawing task

AU - Smith, A.D.

AU - Gilchrist, I.D.

AU - Butler, S.H.

AU - Harvey, M.

PY - 2006/3

Y1 - 2006/3

N2 - Background: Drawing, and the clock drawing task in particular, is widely used as a diagnostic tool in the study of hemispatial neglect. It is generally assumed that the errors in graphic production, such as the misplacement of numbers, reflect a visuospatial deficit, and that drawing production itself (for example, producing the circle) is unimpaired. Objectives: To test this assumption by examining whether the production of simple circles is affected by neglect. Methods: 16 right hemisphere stroke patients copied circles of various sizes and their drawings were measured for size accuracy. Results: Patients with more severe neglect produced greater scaling errors, consistently drawing the circle smaller than the original. Errors were not in the horizontal axis alone-shrinkage occurred equally in both height and width axes. Conclusions: Neglect can co-occur with constructional difficulties that serve to exacerbate the symptoms presented. This should be taken into account in the assessment of even apparently simple drawing tasks.

AB - Background: Drawing, and the clock drawing task in particular, is widely used as a diagnostic tool in the study of hemispatial neglect. It is generally assumed that the errors in graphic production, such as the misplacement of numbers, reflect a visuospatial deficit, and that drawing production itself (for example, producing the circle) is unimpaired. Objectives: To test this assumption by examining whether the production of simple circles is affected by neglect. Methods: 16 right hemisphere stroke patients copied circles of various sizes and their drawings were measured for size accuracy. Results: Patients with more severe neglect produced greater scaling errors, consistently drawing the circle smaller than the original. Errors were not in the horizontal axis alone-shrinkage occurred equally in both height and width axes. Conclusions: Neglect can co-occur with constructional difficulties that serve to exacerbate the symptoms presented. This should be taken into account in the assessment of even apparently simple drawing tasks.

KW - alzheimers

KW - graphic disturbance

KW - patients

KW - hemispatial neglect

KW - clock drawing task

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