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Pure topographical disorientation due to right posterior cingulate lesion
K Katayama1, N Takahashi, K Ogawara
1Department of Neurology, Narita Red Cross Hospital, Chiba, Japan.
Summary
An 82-year-old woman experienced pure topographical disorientation after a stroke. The right posterior cingulate gyrus appears crucial for memorizing new routes and spatial navigation.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Psychology
Background:
- Topographical disorientation is a cognitive deficit affecting spatial navigation.
- Cerebral infarction can lead to various neurological impairments, including spatial memory loss.
Observation:
- An 82-year-old woman developed pure topographical disorientation following a stroke affecting the right posterior cingulate gyrus.
- She could navigate familiar environments but became lost in new ones.
- Her ability to recognize familiar and unfamiliar scenes in photographs remained intact.
Findings:
- The patient's inability to memorize new routes suggests a loss of wide-area directional memory.
- The specific lesion location points to the right posterior cingulate gyrus's role in route memorization.
Implications:
- This case highlights the critical role of the right posterior cingulate gyrus in spatial memory and navigation.
- Understanding this deficit can inform rehabilitation strategies for patients with stroke-induced topographical disorientation.