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[Visual memory in a case of topographical disorientation] | JoVE Visualize

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[Visual memory in a case of topographical disorientation]

T Nakayama¹, K Sato, M Kotera

¹Department of Neurology, Tsuchiura Kyodo Hospital.

Rinsho Shinkeigaku = Clinical Neurology|April 1, 1994

View abstract on PubMed

Summary

This study investigates topographical disorientation in a patient with visual field deficits. Impaired visual memory, particularly delayed recall, was identified as a key factor in the patient's spatial navigation difficulties.

Area of Science:

Neuroscience
Cognitive Psychology
Medical Imaging

Background:

Topographical disorientation (TD) affects spatial navigation abilities.
Understanding the neurological underpinnings of TD is crucial for diagnosis and treatment.

Observation:

A 67-year-old male presented with restricted visual field and topographical disorientation.
Neurological examination revealed left upper quadrantanopsia.
MRI identified lesions in the right fusiform and lingual gyri, and left cuneate gyrus white matter.

Findings:

The patient exhibited severe deficits in visual memory recall and learning, including impaired performance on the Rey-Osterrieth complex figure and Wechsler Memory Scale-Revised (WMS-R).
Despite preserved verbal intelligence (Verbal IQ 126), performance IQ was lower (92), and visual retention was poor (Benton Visual Retention Test).
Specific tests ruled out unilateral spatial neglect, prosopagnosia, apraxia, and aphasia.

Implications:

Visual memory impairment is a significant factor in the pathogenesis of topographical disorientation.
These findings highlight the critical role of visual memory in spatial orientation and navigation.
Further research into the relationship between visual memory deficits and TD is warranted.

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[visual Memory In A Case Of Topographical Disorientation]