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What side is blind in homonymous hemianopsia the cva side or the hemiplegic side?
Because of the way things are "wired" from the eye to the brain the hemiplegic side of each visual field is blind. For example if you have a stroke on the right side of your brain that causes a left sided hemiplegia (and also presumably affects the area of the brain responsible for sight) then you would not be able to see anything to the left of whatever you are fixating on in BOTH eyes.
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This is because the right-sided stroke destroys nerve fibres that run through the right side of the brain from the right-side of each retina.
The result of losing these fibres is effectively the same as losing your right retina in both eyes --- this always results in a LEFT-sided visual field loss (left homonymous hemianopia) because the Right retinal wall of each eye sees the Left of the world because all light and images come to it through a small gap at the front of the eye (the pupil)
(ie - the right side of your retina can't see straight ahead of itself because the sclera is opaque and blocks all light - the only light that gets to the right of the retina is through the hollow pupil on its left - it can therefore only see the left of the world)
This can be seen clearly on a visual pathway diagram (Google images)
Pitfall 1 - Remember that the term "homonymous hemianopia" refers to the symptom of vision loss and not the location of where the damage occurred (eg - a L-sided homonymous hemianopia is literally LOSS OF LEFT FIELD OF VISION)
Pitfall 2 - "the homonymous hemianopia should be R-sided if the Right brain is affected" This is wrong - failure of transmission of information from the Right retina occurs but this results in a Left-sided homonymous hemianopia (as per explanation above)
Pitfall 3 - "classic stroke won't affect vision as the occipital coretx isn't affected" - this is wrong - an infarct almost anywhere along the length of a cerebral hemisphere or even the internal capsule may disrupt visual nerve fibres, as they take a long course
In summary, Right-sided stroke = Left-sided hemiparesis/plegia and Left-sided homonymous hemianopia
THE HOMONYMOUS HEMIANOPIA IS ALWAYS ON THE SAME SIDE AS THE PARESIS
What else can I help you with?
A sentence using On the blind side?
on the blind side
What lexiLe level is the blind side?
The blind side's lexile is 910
Does Jaleel White play in The Blind Side?
Jaleel White does not appear in The Blind Side.
Who was the Baltimore Ravens player in the movie 'The Blind Side'?
Michael Oher is the player in "The Blind Side".
Did everything in 2009 movie 'The Blind Side' really happen?
Yes everything in the blind side is real.
Can hemiplegic migraine cause a stroke?
Hemiplegic migraines affect a very small percentage of people in the United States. People with hemiplegic migraines experience paralysis or weakness on one side of the body, disturbances in speech and vision, and other symptoms that often mimic a stroke.
A sentence using On the blind side?
on the blind side
Will there be a blind side 2?
There will not be a sequel to the Blind Side.
What lexiLe level is the blind side?
The blind side's lexile is 910
Who was the author of The Blind Side?
Michael Lewis is the authour of The Blind Side.
Is the Blind Side or The Twilight Saga New Moon better?
Blind Side
Which Novel Blind Side Movie Based On?
The Blind Side: Evolution of a Game.
When was The Blind Side released?
The Blind Side was released on 11/20/2009.
Does Jaleel White play in The Blind Side?
Jaleel White does not appear in The Blind Side.
When does The Blind Side come out on DVD?
The Blind Side comes out on March 23, 2010.
When does the video of blind side come out?
The Blind Side comes out on March 23, 2010.
Who was the Baltimore Ravens player in the movie 'The Blind Side'?
Michael Oher is the player in "The Blind Side".
