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Published on: August 22, 2025
Visual field dependence influences balance in patients with stroke
J C Slaboda1, J E Barton, I B Maitin
1Dept of Physical Therapy, College of Health Profession, Temple University, Philadelphia, PA 19140, USA. aboda@temple.edu
Summary
Post-stroke patients show increased visual dependence and difficulty resolving sensory conflict, leading to instability in moving visual environments. This impacts their balance more than healthy individuals.
Area of Science:
- Neuroscience
- Human Physiology
- Vision Science
Background:
- Stroke can affect sensory processing and balance.
- Visual dependence, the reliance on visual cues for orientation, can be altered by neurological conditions.
- Understanding visual-somatosensory integration is crucial for rehabilitation.
Purpose of the Study:
- To compare visual dependence in post-stroke patients versus healthy adults using the Rod and Frame Test.
- To investigate if heightened visual dependence in stroke survivors correlates with impaired postural responses in dynamic visual environments.
- To explore the challenges in resolving visual-somatosensory conflict post-stroke.
Main Methods:
- Participants included young adults, older adults, and post-stroke patients.
- The Rod and Frame Test assessed visual field independence/dependence.
- Center-of-mass (COM) displacements were measured in static (dark) and dynamic (moving virtual environment) conditions.
Main Results:
- Post-stroke patients demonstrated greater errors on the Rod and Frame Test, indicating increased visual dependence.
- While balance in the dark was similar to controls, patients showed significantly larger and faster COM displacements in a moving visual scene.
- Stroke survivors exhibited more difficulty resolving conflict between visual and somatosensory cues compared to healthy groups.
Conclusions:
- Patients with stroke exhibit heightened visual dependence and impaired sensory conflict resolution.
- This deficit contributes to instability in dynamic visual environments, highlighting a potential target for rehabilitation.
- Visual-somatosensory integration challenges are a key factor in post-stroke balance impairments.
