| Title |
Environmental Tilt Illusion as the Only Symptom of a Thalamic Astrocytoma |
| Creator |
Aldridge, AJ; Kline, LB; Girkin, CA |
| Affiliation |
Department of Ophthalmology, University of Alabama School of Medicine, Birmingham, Alabama, USA. |
| Abstract |
A 14-year-old girl experienced two episodes of environmental tilt illusion. During both episodes, which lasted less than 1 minute, she perceived all objects within view as rotated 45 degrees clockwise. There were no auras, accompanying symptoms, or sequelae. Neuro-ophthalmic examination findings were normal except for a right relative afferent pupil defect (RAPD). Imaging disclosed a cystic mass in the left posterior thalamus with compression of the brachium of the left superior colliculus. Stereotactic biopsy revealed a pilocytic astrocytoma. This is the first case documenting environmental tilt illusion as an isolated symptom of a thalamic lesion. Disruption of vestibular connections between the posterior thalamus and the posterior parietal cortex may be the cause of this visual perceptive disorder. |
| Subject |
Adolescent; Astrocytoma/complications; Astrocytoma/diagnosis; Astrocytoma/pathology; Brain Neoplasms/complications; Brain Neoplasms/diagnosis; Brain Neoplasms/pathology; Female; Humans; Iris Diseases/etiology; Magnetic Resonance Imaging; Perceptual Disorders/etiology; Perceptual Disorders/physiopathology; Space Perception; Thalamus; Visual Perception |
| Format |
application/pdf |
| Publication Type |
Journal Article |
| Collection |
Neuro-Ophthalmology Virtual Education Library: Journal of Neuro-Ophthalmology Archives: https://novel.utah.edu/jno/ |
| Publisher |
Lippincott, Williams & Wilkins |
| Holding Institution |
Spencer S. Eccles Health Sciences Library, University of Utah |
| Rights Management |
© North American Neuro-Ophthalmology Society |
| Setname |
ehsl_novel_jno |
| ID |
225157 |
| Reference URL |
https://collections.lib.utah.edu/ark:/87278/s63f7vpw/225157 |
