NCT06352086

Understanding Visual Processing After Occipital Stroke

• Status: Withdrawn
• Phase: —
• Study type: Observational
• Enrollment: 0 (actual)
• Sponsor: University of Rochester · Academic / Other
• Sex: All
• Age: 21 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to investigate how visual orientation discrimination and metacognition (i.e., perceptual confidence) are affected by occipital stroke that causes hemianopia and quadrantanopia in adults. This research will provide insight as to how the residual visual system, which not directly damaged by the occipital stroke, processes orientation (assayed in terms of orientation discrimination) and metacognition (by measuring perceptual confidence for orientation discrimination). These measures will be used to refine computational models that attempt to explain how the brain copes with loss of primary visual cortex (V1) as a result of stroke. This knowledge is essential to devise more effective visual rehabilitation therapies for patients suffering from occipital strokes.

Conditions

• Vision Loss Partial
• Vision; Loss, Both Eyes
• Hemianopia, Homonymous
• Hemianopia
• Quadrantanopia
• Stroke, Ischemic
• Stroke - Occipital Infarction
• Cortical Blindness
• Occipital Lobe Infarct
• Peripheral Visual Field Defect of Both Eyes

Timeline

• Start date: 2025-12-01
• Primary completion: 2028-09-01
• Completion: 2029-09-01
• First posted: 2024-04-08
• Last updated: 2024-10-08