Neurophysiology of Attention: Hemi-spatial Neglect

Brief description of the neuropsychology of hemi-spatial neglect in which patients ignore one side of their entire world.

[@SherriBodds]

Yes, very interesting and PUZZLING indeed. Pretty difficult to fully understand from their perspective. My poor kitty is actually experiencing this after a stroke. So I thank you VERY much for sharing your education with us.... especially since it's not at all straightforward in understanding. This is great in helping us understand their world a bit better so we can hopefully assist them better.

[@SherriBodds]

I'm "going" twice 😁 bc I'm listening further, as I write and I WANT to again say THANK YOU IMMENSELY for this!!! What your explaining this second half is exactly the kind of information I was looking for but doubted I'd get. I thought it'd be too difficult to put into words since it's abstract. AWESOME and PRICELESS information here!!!

[@useresu301]

For people that seem to have trouble imagining what is it like having this. Firstly, this is like trying to explain a color blind man how some color he doesn't perceive looks like. No amount of words can replace experimenting (living) it, but I shall try to offer an analogy (based on how I understand it, I'm not suffering from it). Since this condition doesn't affect their eyes, it's all about how their brains process the spacial information around them. It's probably like this: a healthy individual looking straight ahead are very aware of what's right in front of them. Less and less aware towards the periphery until everything goes "out of sight, out of mind". Notice the world outside peripheral vision doesn't simply go "to black" as if looking at a black screen, it simply ceases to exist for you. I'm guessing this is exactly what happens here, it's just the peripheral "vision" (it's actual perception in the brain, not vision, since their eyes are working fine) for these people starts from the middle of field of view, or center of "the image" if you will.

[@itskittyme]

( about patients with left spatial neglect ) What I don't understand is what happens once they move their focus to the left. For example, all these half-drawn pictures they make.... why is it that they draw half a picture, when they could just easily move their focus to the left side of the image. Wouldn't they immediately notice the issue since then the entire picture is on the right side of their vision? Or the experiment with the horizontal line where they draw a vertical one through the middle. Wouldn't this horizontal line suddenly expand in their perception when they move their focus to the left slowly, then notice the line expanding? They should really start noticing that the original vertical line is no longer in the center of the line. These experiments are all really confusing and seem incomplete to me, making it difficult to grasp. And unfortunately the patients that do get interviewed on KZbin, are not really describing it thoroughly - something that should still be possible if the doctors thoroughly explained that their consciousness differs from healthy people. There should be patients out there who are intelligent enough to go to great lengths in explaining and describing every detail of how their own perception ( = their altered state of consciousness ) works. But they are not on youtube :-( If you know of such an interviews with patients who are scientifically literate, that could be a great help!

[@eccehomo4152]

Excellent and informative video!

[@h.q.1736]

Fantastic 👍🏻👍🏻 thank you so much

[@Dandlion37]

I have this... since a road traffic accident in 2009 resulting in brain injury... the insurance company against my claim, refused pick to this up, and dismissed my claim as malingering or hysterical... 4yrs on, it was finally diagnosed... and I’ve been struggling and trying to adapt with it ever-since.... 😡😡😡

[@useresu301]

@Miranda L I've tried to explain what it's like (I'm speculating). See comment above.

[@bana6957]

beautiful explanation! thanks!

[@cavnav1468]

I came here from Oliver Sack's 'The Man Who Mistook His Wife for a Hat' - this condition is described in chapter 8 (titled: 'Eyes Right!'), but I didn't quite understand.

[@SisyphusRedeemed]

Wow, you have some really good content on this channel. Thanks for sharing. It may take me a while to go through all this. Quick question: do you have any videos that focus specifically on how emotions are instantiated in the brain? Or how emotional disorders arise, anything like that?

[@PaulMerritt]

SisyphusRedeemed not yet but I will have one on emotion and the brain up soon! Thanks!

[@FiredSix]

it appears someone has already said it all, I'm really grateful to have came across your channel, Amazing work.

[@leticiahodding5682]

Hi, this video has been really informative thank you! I was wondering if you have any recommendations for further reading about what neglect tells us about healthy brain functioning? Thank you!

[@notyou6674]

how do they read? i would have thought they would start in the middle and get confused or something. i totally don't even understand whats happening to these people, other stuff like schizophrenia i can sort of understand but i seriously don't know how these people interpret reality. are there any videos of these people i can watch?

[@ecehancandan8047]

Hello, thanks for the video. I wonder how some patients managed to draw the left ear (but not the left eye) of a woman face from memory? Does it depend on the seriousness of the condition? Or are they able to apply some other mechanism while relying on their memory when compared to copying tasks?

[@PaulMerritt]

I'd have to look back but it's possible the blank face used already has ears on it.

[@noeditbookreviews]

Who's here because of "Phantoms in the Brain?"

[@user-jy4zj7ep1k]

consciousnick - got an exam and came by