Mary Warren: Vision and Brain Injury. Part I 

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1. WARREN: They are very concerned about falling and running into something. If you have a hemianopia you’re going to have some collusions right off the bat. And they walk very slowly or they do a thing where they stare straight ahead and just walk towards a target and hope they make it. These are dangerous types of things and you can’t get away with them when you’re in dynamic environments; they don’t keep you safe. So the person tends to avoid dynamic environments and won’t go outside the house then, because of the way they’re moving. So we...the big culprit for that....I gues that takes me off in a different direction that’s a very interesting thing that the brain does is that when we’re scanning our environment, when we’re finding things, we don’t go from object to object to build a visual scene. Instead what our frontal lobes do is they sample the visual scene and then they perceptually complete it based on past experience with this environment and expectations of what you should see and by doing that the frontal lobes allow us to process information very rapidly and move through environments that are very dynamic, like driving environments. What was discovered about hemianopia and the first research was published in the 1960’s, is that person’s with hemianopia where fifty percent of their vision is missing, actually exercise perceptual completion. So when you first experience a hemianopia, even though you’re missing fifty percent of your vision, you feel like you see everything. You have a completed visual field in front of you, you don’t have a border that tells you exactly where you have vision and where you don’t have vision. There’s no black curtain there, there’s nothing to tell you when you are getting into your blind field or how far you should go into the blind field.

EPISODE SUMMARY: This episode of NOGGINS & NEURONS: Stroke and TBI Recovery Simplified is Part I of our conversation with vision expert, Dr. Mary Warren. In this episode we learn about:

• Warren’s professional path into vision - vision and driving rehab, brain injury recovery, her development of the Visual Perceptual Hierarchy

• 50-90% experience ocular motor problems

• Quit reading due to difficulty finding the words, slowness and fatigue

We hope you feel as inspired as we do after listening to this episode on vision.

As always, we want to hear your top takeaways!

LINKS TO ARTICLES, BOOKS AND OTHER IMPORTANT INFORMATION:

DREX Durham Reading & Exploration Training

A Hierarchical Model for Evaluation and Treatment of Visual Perceptual Dysfunction in Adult Acquired Brain Injury, Part 1

A Hierarchical Model for Evaluation and Treatment of Visual Perceptual Dysfunction in Adult Acquired Brain Injury, Part 2

visAbilities

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• Eye-Search Therapy Online vision correction game

Pete’s blog, book, Stronger After Stroke, and talks.

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• October 28, 8:00 PM (ET) The Neuroplastic Model of Spasticity Reduction *Virtual. 

Deb's OT Resources:

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MUSIC:

“Soft Inspiration” by Scott Holmes/Scott Holmes Music/scottholmesmusic.com