Abstract
Clock-drawing is a widely used bedside test of constructional ability, but it has never been systematically studied or standardized. We examined 87 clocks drawn by neurologically impaired patients and age-matched controls, and propose a set of criteria for scoring clocks. Patients with probable Alzheimer’s disease and other dementias have gross impairments in clock-drawing. These deficits include poor spatial arrangement of numbers, incorrect numerical sequence, insertion of stray lines, and addition of extra numbers. In Alzheimer’s disease, the total score on the clock-drawing test correlates with the score on the Modified “Mini-Mental State” Examination. Non-demented patients with Parkinson’s disease showed only defects in the spatial organization of the numbers, and non-demented patients with other diseases perform as well as controls.
Original language | English (US) |
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Pages (from-to) | 39-48 |
Number of pages | 10 |
Journal | Behavioural Neurology |
Volume | 2 |
Issue number | 1 |
DOIs | |
State | Published - 1989 |
Externally published | Yes |
ASJC Scopus subject areas
- Clinical Neurology
- Neurology
- Neuropsychology and Physiological Psychology