Damage to visual cortex on one side of the brain frequently produces a profound and permanent blindness in contralesional space (hemianopia), a debilitating condition that causes enormous suffering for patients and their families.
The over-arching objective of the current proposal is to evaluate the functional recovery of vision in hemianopic (blindness in one hemifield) and quadrantanopic (blindness in one quadrant) patients engaged with a multisensory training paradigm. This will pave the way for clinical trials in which this simple, non-invasive training paradigm can be developed for therapeutic use to treat blindness resulting from cortical damage.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
30
12 research sessions + clinical visits at the time of the first and last session - In each session, there will be a "training phase" in which subjects will be exposed (and respond) to spatiotemporally congruent pairs of visual-auditory stimuli presented within their blinded field, with occasional probes of unisensory visual stimuli on both sides of space. There will also be a "testing" phase during which they are presented with visual stimuli in virtual reality (VR) to assess multiple aspects of visual function. This "visual battery" consists of innocuous stimuli, e.g., flashes of light or moving bars, presented at intensities consistent with those experienced during daily life. Subjects detect or discriminate the stimuli (e.g., judge whether a stimulus was flashed, or which stimulus is brighter) and report confidence in assessments.
Wake Forest University Health Sciences
Winston-Salem, North Carolina, United States
Change in National Institutes of Health Stroke Scale (NIHSS) score
The National Institutes of Health Stroke Scale (NIHSS) is a standardized, 15-item physical and mental examination used by healthcare providers to objectively quantify the severity of an acute stroke. Scores range from 0 (no neurological deficit) to 42 (severe impairment).
Time frame: Month 6
Change in Activity Inventory scores
A questionnaire that asks how vision affects everyday activities. It helps show which daily tasks are most important to the participant and how difficult those tasks may be because of vision problems. Patients rate the importance of a goal and the difficulty of tasks, resulting in an individually tailored dataset. This adaptive approach provides a comprehensive profile of how visual limitations affect everyday life.
Time frame: Month 6
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