Agnosia

[jazu7200]

Gracias, muy útil

[belalcazardiego]

why is it considered optic ataxia? is it because she is over and under shooting? wouldn't that be dysmetria: the inability to judge distance?

[steflova2]

she is only able to identify the item after touching it with her left hand.

So she has a combination of neurological conditions - agnosia and balint are just 2 of the conditions.

[PaolaMaria0219]

This is called Balint Syndrome.

[mjs0708]

She has optic ataxia and possibly visuospatial neglect or Balint's syndrome. This was likely caused by a large right middle cerebral artery stroke that implicated both temporal and parietal lobes. If Balint's syndrome, it would be caused by bilateral parietal and temporal damage. Fascinating stuff!

[soisy]

creepy

[Wiggyify]

this is obviously more than just object agnosia, she has serious visual field defects i think...and dementia...

[martypree]

Yea it appears that she does have visual field deficits...the therapist even said, "Wait a minute while I get in the right field"..implying he knew she couldn't see in others.

[kaechi31]

object agnosia and???

thanks for the vid

[espiramitolonametila]

m podria traducir algien el video?

[andrux83]

It looks like this woman has optic ataxia as well as agnosia..??

[shenze11]

i agree, both dorsal and ventral streams seem affected

[koloche]

this is a poorly conducted study in my humble opinion. The lady clearly needed glasses. And she wasn't able to grasp the object. so besides agnosia, an even more likely diagnosis is simple blindness! someone with very little vision might not see clearly enough to recognise and object, but would be able to do so upon stereotactic stimuli (ie holding the object). Blindness was not ruled out in this video.

interesting stuff nevertheless

[nofxnate28]

it looks like she has dismetria as well and thats why she wasnt able to grab the item

[matelue]

To me this looks clearly like Balint's syndrome + apperceptive agnosia and maybe right-side neglect? I don't exactly see, if she immediately sees the item in the beginning.

[RedRender]

This is a poorly thought out response in my humble opinion. It wasn't that the woman "needed glasses" she couldn't distinguish what object was being held in front of her because of what seems to be a case of object based agnosia, and couldn't grasp the object because of optic ataxia. It was two symptoms, not just one that caused what you saw in this video, and most certainly not an issue of "simple blindness"

[underscorex5]

this is very interesting. It'd be nice if you could provide some interpretation of what is going on here to the curious layman

[as2421]

I don't know if anyone replied to you, but I can give you the quick and dirty version of what's goin on. It turns out that seeing an object and recognizing what it is are two things handled by different areas of the brain that are coincidentally right near one another if you look at a gross brain. She seems to have a lesion (tumor, loss of bood to the area, trauma etc) in Brodman's area 18 or 19, while area 17 which is for seeing an object, is fine it appears save maybe a need for glasses.

[as2421]

All three of these areas are on the back part of the brain. If you feel the back of your skull you'll feel a distinct bump in the midline. This is a structure that protects your highest acuity vision center. Area 17 is right around this bump and 18 and 19 are just above it. Does this help you? Many of the other comments are probably from more experienced medical personnel or students, but this is the first year medical student's explanation. Hope it helps!