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Updated: Jul 18, 2026

The Other End of the Leash: An Experimental Test to Analyze How Owners Interact with Their Pet Dogs
Published on: October 13, 2017
The woman who needed a pet
Michelle Atchison1, Andrew R Harrison, Michael S Lee
1Department of Ophthalmology, University of Minnesota, Minneapolis, MN 55455, USA.
Abstract:
A 72-year-old woman developed difficulty reading, driving, and playing dominoes. Ophthalmologic examination revealed a homonymous hemianopia, but brain MRI showed no abnormality to explain the visual field defect. Neuropsychiatric testing demonstrated severely impaired visual processing (simultagnosia, visual agnosia, visuospatial difficulty). Positron emission tomography revealed hypometabolism of both parietal and occipital lobes consistent with posterior cortical atrophy or the visual variant of Alzheimer disease. Functional neuroimaging should be considered in the setting of a normal MRI among patients with signs and symptoms of the visual variant Alzheimer disease.
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