Hemispatial Neglect: When Half Your World Disappears

Losing half of the world sounds like a weird, abstract dream state. But for those that develop hemispatial neglect, that’s exactly what happens, without them even realizing it.
Hosted by: Hank Green
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Sources:
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jnnp.bmj.com/content/75/1/13
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[@NewMessage]

Somewhere out there, someone just watched half this video.

[@leechyfruit4464]

Imagine only watching half of this 3:21 video.

[@empathnation5433]

@@leechyfruit4464 or when the words are only on the left side of the screen

[@imsodunmer6585]

Haha that's

[@Brooke-ey5ow]

Lol actually is have visio spalatial neglect from an MS attack (basically mini strokes) I see out of both eyes but only my left side perceives details suck as depth perception and object permanence. Actually makes me legally blind, BUT I do hold the phone to my left side to watch KZbin lol

[@julieeisenhart920]

Hii. That's me

[@PurpleAmharicCoffee]

Darn, they actually said analogue clock. My plan to draw a digital clock for these kind of tests has been foiled.

[@duran-yt]

Huh, the sleep part seems like it could somehow be related to how some animals sleep with only half of their brain at a time to keep aware of their surroundings.

[@AuntBibby]

Coldbrew wow it’s almost like the distinction between humans & animals is based entirely on emotional, religious notions that any other species would feel if they were in our shoes 🤔🤔🤔🤔🤔🤔🤔🤔🤔🤔🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐🧐

[@entertainmentinc9735]

UncleBibby your comment makes no sense

[@grimtygranule5125]

@@entertainmentinc9735 He's saying that, we and all other multi cellular organisms on Earth are pretty much the same. Except we as humans have developed a natural bias that we're somehow more special than any other animal. Which is true to the extent that most animals can't exactly build rockets but I'm sure you get the point now.

[@TheRABIDdude]

Hmmmm I don't think this is related. The point they bring up here is in humans there's asymetry of function: as you drift to sleep you always lose attention on your left side before your right. And they also described that the right half of your brain is more important for attention than the left half. But with those animals (I think) they alternate which half of their brain they sleep with, suggesting no assymetry. So there's not really any relation to humans to be made here.

[@justingasparino9204]

This sounds a lot like when you cut a person's corpus callosum like when shown a word on one side they still see it but cant remember seeing it but can draw it

[@RAFMnBgaming]

Is that something that happens a lot?

[@jeffreym68]

@@RAFMnBgaming Typically it's only done in severe cases of epilepsy. It stops the seizure activity from passing from one hemisphere to the other. That way the damage is limited. Very rare.

[@fierypickles4450]

@@RAFMnBgaming look up bicameral mind, its pretty interesting

[@EldestZelot]

@@RAFMnBgaming It's a reference to a study which got a Nobel prize, also being known as Sperry's research. Basically it demonstrated that there exists lateralisation between the right and left hemisphere. So basically, they differ in function. As for a corpus callosotomy, it's when you cut the corpus callosum (the membrane between your right and left hemisphere) in half. Effectively separating the two hemispheres and not allowing them to communicate.

[@joyl7842]

sounds like that episode of House M.D. where one of a patient's arms seemingly has a mind of its own, because of a similar brain surgery

[@BrainsApplied]

Our brain works in such an interesting way. There's also this condition in which people are not consciously able to see. Yet, they can still perfectly navigate through a corridor, or catch a ball. (I forgot the name.)

[@johnopalko5223]

Blindsight.

[@JanB1605]

Or people who can only remember people they don't see. They recognize a person based on their voice but when the person is standing in front of them they are not able to recognize that person. Another interesting (and my absolute nightmare) is "locked-in syndrome" where you are literally trapped inside your body. It's like sleep paralysis, but you are not sleeping...

[@htopherollem649]

Even when catatonic they can catch a ball that is tossed to them

[@scottcupp8129]

The brain is so vastly complex. SO vastly complex. Neuroscience haven't even scratched the surface of how that little wrinkly fella works. In fact, I don't think medicine was really MEANT to understand how the brain works.

[@nj586]

Anybody else reminded of "Brain on Fire" when they saw the clock with the numbers on one side?

[@sardonicsardonyx359]

Omg, I totally forgot that book existed! Thanks for reminding me of it's name

[@sathanimations1457]

Do these people drive cars? It would explain some of the chaos of driving in the DC/VA area...

[@NiePieerdol]

Yeah, but they think they're driving a motorcycle

[@Finkelfunk]

No, with a neglect you basically lose your right to participate in any type of traffic for the rest of your life.

[@Silkendrum]

They can't push a shopping cart around a grocery store, or walk down a corridor, or navigate through a doorway..

[@grimtygranule5125]

@@Silkendrum This is true of most people that have had strokes. But 2:33

[@Silkendrum]

@@grimtygranule5125 - My late husband had a right parietal oligodendroglioma. He lost the left side of his world suddenly, shortly after his second debulking surgery. He woke me in the middle of the night very frightened, because "there's someone else in the bed". He pointed to his left arm, and whispered, "that's his arm!" In the morning, he came out of the shower with his robe only on his right side, the left trailing on the floor behind him. When he tried to put his pants on, he put them only on his right leg, and then couldn't figure out why he couldn't pull them up. He was very intelligent and quickly figured things out, but understanding didn't make things easier. For example, when you go through a doorway, you allow for the width of your body, but when the left side of your body no longer exists and you center only the right side, you crash the left side into the door frame. I couldn't leave him home alone, so took him with me when I went to the grocery store, and that was a bumper-car horror show. (At first he could still walk and use his left arm, even though he didn't seem to be aware what it was doing, but that disappeared after a few weeks. He had to relearn how to walk, which was amazing.) When he read a book or magazine, he read only the right pages. If there were two columns on the page, he read only the right column. The REALLY weird part was that if there was a double word within a sentence, like "meanwhile", he registered only the right part of the word ("while") and apparently his brain simply threw away the left half. That blew our minds. Obviously at some level, he was aware of the left, but his brain was incapable of integrating it. Like he HAD to ignore it. He was a chemist, a natural scientist, and we set up a lot of experiments to test the effects. I think he actually had fun with it at first, until it got scary. But, having seen him with a grocery cart running down people and crashing into shelves, there's NO WAY he could possibly drive a car. The left side of the world simply didn't have a reality.

[@ajuicejemas]

I actually suffered from this condition. This guy named Wekapipo screamed WRECKING BALL during a horse race and I lost the left half of my body for a few minutes.

[@rickjames5998]

what

[@ajuicejemas]

@@rickjames5998 it's a JoJo reference

[@MrEmottie]

I would love an episode about Aphantasia. I recently realised other people can see images in their minds and I can't

[@noonespecial9233]

Oh I would love an episode like that too! I feel like it's something people don't understand super well and get worried about needlessly. I spoke to a guy who thought he has Aphantasia but in reality he just wasn't remembering things in as much detail as he thought he was supposed to. SciShow, we need another brain compilation!

[@MsAwesomeify]

@@noonespecial9233 I think most people don't "see" things vividly, that's hallucinating, but rather a clear idea that they can describe

[@noonespecial9233]

@@MsAwesomeify yeah, that's what my friend was confused about I think. Like he thought you could close your eyes and recall a perfect exact image of anything, like everyone had a photographic memory or something. Obvs not the case lol

[@sophierobinson2738]

Aphantasia TED talk, do a search. very interesting.

[@_DiJiT]

I want to see a video on this because a lot of clarity has been tarnished with the recent popularity of this I can summon up an item, I can zoom in, zoom out, rotate it, conceive of every minute detail, including physical properties and interactions, but I do not see anything visually. Nobody is explaining that seeing with your "minds eye" doesn't LOOK LIKE seeing with your eyes.

[@DharmaDerelict]

Just heard about this earlier today from a coworker, and then this video pops up tonight for me. That happens a lot to me. Weird conversational coincidences.

[@natalieramsey4727]

This reminds me of something I experience; hemiplegic migraines. The difference being that instead of my brain neglecting the outside world, it neglects the side of my body affected (that being my left of course!!) in a way I suppose they’re similar in that the sensory parts of the effected side are some of the first things to go; eye, ear, mouth, and nose being the first and most obvious. Thankfully my condition is “temporary”, however it does leave some lasting effects, and is tied closely to my migraines and so now that they’re better managed don’t last all day every day thankfully!

[@Mother_boards]

Is this... The work of an enemy stand?! Oh no wait, it's just Wekapipo.

[@faktionfpv3590]

Literally though

[@johnvanek9514]

I was looking through the comments just for the jojo reference

[@gamesturbator]

I can really relate to this video. Long story: Several years ago (think I was 46) I'd been sitting in my chair and suddenly my whole face froze for a minute or so, my whole back side had this tingling sensation and I suddenly lost all feeling in the my back and back and top of my head for over a year. An MRI showed half my left hemisphere missing. The neurologists I saw over the next few years said i hadn't had a stroke and the first one said he'd only seen this in Alzheimer patients (and I did suffer dementia-like symptoms at the time-which eventually started to subside after a year). Had several more MRI's on my brain and plus a spinal tap, yet 4 other neurologists still couldn't diagnose me. Fortunately the severe confusion (getting lost, seeing things, finding, myself in different places in my own home with no memory how I'd gotten there, etc), went away a year or so later though the back of my head still had no feeling for a few more years. Frequently I'd feel this tingling in the back of my neck and I'd suddenly start to lose the ability to stand or stay awake. Eventually the the feeling started to come back little by little but I still feel extremely lethargic all the time. If it wasn't a stroke than WTF was it? I have just given up trying to get help finding out what happened.

[@htopherollem649]

Since I got hit by a car in 94 at 19 years old I don't interpret the information coming from my left side as strongly despite being left handed. (If I touch my hands or feet ect. together I have a stronger tactile feedback on my right. Similarly I primarily see with my right eye. I notice when wearing headphones that I hear in stereo but if I use only the left ear it becomes almost like screaming into my brain instead of music. When tested for sensitivity both sides are equally responsive but my brain interprets input from my left side as deminihed . Like turning my car stereo balance to 3/7 instead of 5/5. Now also extremely lethargic with no expectations for the medical profession to help

[@adorabasilwinterpock6035]

Migraine?

[@crazygoldy1538]

that is freakyy. Glad youve recovered but did u make any progress in finding what happend? the mri showing u lost the left hemisphere is just insane to me...do present mri show u have ur left hemisphere back?

[@scittw22]

I'll never forget the first time I spoke to someone with this condition. I was unaware I was standing on the neglected side as I spoke. She seemed uncomfortable and asked move to the other side because I didn't exist over there. Not she couldn't see me or couldn't understand me. I didn't exist

[@dougstubbs9637]

I suffered a traumatically Aquired Brain Injury (injury not illness) from an Industrial Incident in 99. Oddly, I lost the ability to read time on an Analog Clock Face. Found out that it is an affect of Left Neglect, though I don’t have any other symptoms of this. Thank-full for that, as after losing my right arm due to Stroke(factor five Leiden) I’m now a full time Lefty. Excellent Presentation.

[@se777en73120]

When I was 18, I had a stroke in my right parietal lobe. It turned out to be caused by a brain tumor. 2 days later, I had to have surgery to repair the blood vessel and remove the tumor. Lost my speech and feeling in my left hand and foot, and ability to play guitar. But fortunately, didn’t experience hemispatial neglect. And 90% regained my speech after a year and a half. That was in 1997. Now I have around 95% of my speech back, with the exception of occasional tripping up on my words. I had been studying Russian, Spanish, French, and Latin, on the road for a scholarship. Lost that opportunity, but now I’m a database developer and am making more money than I would have had I gone into linguistics. Sometimes things have a way of working out. Sometimes.

[@sobertillnoon]

I wanna know how the Italian people with this would react if someone said, "what about the fountain you mentioned before? Where is that?"

[@snozzmcberry2366]

Right? I wanted to see some confrontations, see people be notified of their neglected side, see how they process that consciously

[@sobertillnoon]

@@snozzmcberry2366 sounds like we gotta go out there and find people ourselves and antagonize them.

[@parallel4]

They would probably say "I don't know/I don't remember" if they just are unable to process the other side

[@AuntBibby]

Austin Hibdon these damn neurologically-ill jerks, trottin’ around with bodies that force them to perceive reality differently than us... they stomp on all our criticisms of post-modernism just by existing!!! if we’re gonna hold on to the notion that there’s only one objective truth, we gotta get rid of’m, right??? (hides police-issued emergency contact card behind my back that says i have autism, tourettes syndrome, OCD and ADHD-inattentive type)

[@taimunozhan]

No evidence, but I suppose they would believe that they had indeed mentioned it (even though they didn't).

[@procrastinator99]

And now I'm getting Hannibal flashbacks......

[@nikkigriffin6441]

I suppose that is in part what happened in “the girl on fire”. The protagonist goes through a traumatic medical episode, that’s probably a stroke and the test that finally clues the doctor into what happened it tasking her with draw a clock, but all the numbers on the clock she draws are squished to one side.

[@saraellwood630]

Thank you SciShow! Not only do I learn so much everyday watching your videos, but it also gives me something to focus on and calm my nerves before bed every night! Y'all are a blessing, thank you for your hard work!

[@TheMindOfMinx]

When he showed the clock it reminded me of an episode of Hannibal when Will is asked to draw a clock. He thinks he drew it normally but he actually put some of the numbers outside the clock and some in the wrong order and the Hannibal used this as a representation of Wills mental health. What I'm asking is, does anyone actually receive this test for anything but hemispatial neglect? and if so, what could a totally distorted clock, like in Hannibal, indicate?

[@PersonaP3P]

In the show, Hannibal infected Will with a type of encephalitis. The doctor marked the progression of the condition with the tests.. : (

[@AdvanceAU]

This is so strange! I was just watching 'Are People Really Left-Brained or Right-Brained?' right before this was uploaded. It's almost as if SciShow... read my mind. O_o

[@eeach]

That's the KZbin robot reading your mind.

[@AuntBibby]

eeach yeah it’s the KZbin recommendation algorithm replacing the next video you scroll to with one with similar search tags to one you recently saw that you either liked, shared on social media, watched the majority of, watched for a significant amount of real-world time or any combination thereof

[@TheRealWarrior0]

So there might be a third side but nobody is aware of it... 🤔

[@AuntBibby]

TheRealWarrior0 Don’t look now, but there’s someone three seats to your payth who just started a facetime call with Emperor Elvis of the Tupac/Rasputin pangalactic alliance

[@TheRABIDdude]

Woah. This is my favourite comment of the month. It's untestability is on par with religion :O

[@AuntBibby]

TheRABIDdude don’t let the paythsi ders know that you know, dude!!!!!!!!!!!!!

[@AuntBibby]

ɐɐɐɐɐɐnnnƃƃɥɥɥɥ!!!!!

[@samphoenix794]

A bit less than a year ago, my grandpa had a stroke at 90 and now suffers from this syndrome. My family struggled with understanding what that meant and therefore felt helpless in this situation - this 90 year old man who went on hikes and swam a mile every day should suddenly be in a retirement home, because he couldn't care for himself anymore? It was shocking news for a of us. Even moreso, since grandpa was one of the many people with this syndrome that don't even realise the loss of half their world. We were very fortunate that we had someone in the family studying neuroscience, so we had someone to explain in simple terms what hemispatial neglect was, what it means for grandpa, and why, even if grandpa doesn't realise, it is so dangerous to him (just imagine grandpa going to buy groceries and a car comes from his left). I can't imagine how much worse it would have been without understanding what was happening. And that's why I'm leaving this very long comment: Dear SciShow Team, thank you so much for making this video. I haven't yet found anything online that explains my grandpa's situation as understandable as this. This video might help families who aren't so lucky to have a neuroscience student who's able to explain. Thank you so, so much.

[@MissingRaptor]

Thanks for sharing your story

[@eugenetswong]

I love videos about neglect. They shed so much light on how we think...or don't think.

[@1995DylanJ]

The fact that people with this neurological disorder don't even notice it is what scares me a lot. Like, if there's people that don't notice a literal half of the world, how much am I missing without knowing it?

[@Tomsonic41]

This is a fascinating insight into the condition! I myself had a stroke that left me blind on the right side (hemianopsia), but I don't have any symptoms of neglect. Although I do tend to bump into things on my right that I can't see coming. If someone approaches me from the right I can hear their footsteps, but it still startles me when they suddenly appear in the center of my vision!

[@Acidfunkish]

While nowhere near as extreme as this, when my step dad was dying of cancer - including having a tumour in his brain - he started having balance issues. Turns out, he had gone fully blind in one side, had part of the vision in his other side darkening, and he had literally NO clue. He thought he was functioning as normal, but he only had like 35% of a normal field of vision. 😳 So he couldn't see most of where he was going, and it presented as issues with balance and mobility, NOT vision. He thought he could see. 🤷🏻‍♀️ It's so bizarre. Going blind without KNOWING you're going blind seems unfathomable, to me. I can't even imagine how it would "feel." He was a great dude, anyway. He deserved better. And he'll be forever missed. ❤️

[@beshoynagib4812]

Brains !! Always surprises me.

[@klattalexis]

Had this happen decades ago after an intense exercise session. After finishing up & looking in the mirror there was only one side of my face! No kidding it was frightening alright and I let out a cry. The family doctor just dismissed it as hysteria. So it was a stroke you say? Never ever happened again!

[@Christian_Luczejko]

I just discovered this syndrome and I’m both fascinated and full of questions. Learning you have this must be world melting. You don’t know you have it until it is explained and shown to you and even then your not guaranteed to comprehend it.

[@klutterkicker]

4:50 This stock clip is just everyone in the year 2020 tbh.

[@MissingRaptor]

Haha, so true 😅

[@Wewin42]

What a remarkably fascinating video. This comment is just to juice the algorithm. Thanks Hank!

[@SherriBoggs-kj2lk]

Fascinating, and I see why it isn't completely understood. My cat had a stroke a month ago and until today I thought he'd likely gone deaf and blind on his left side, yet neither made complete sense for some reasons. I still haven't found much of anything about this in cats, but this HAS to be it. His spacial awareness, etc etc is way off. He walks right over and though big obvious things he shouldn't and normally never would. What you've talked about explains, or gives me more sensable theories on a LOT of the issues he's experiencing that I couldn't understand. Thank you!

[@sbomorse]

This was fascinating, but this seems like a really dangerous illness to be afflicted with.

[@Vanyx1000]

Fascinating!

[@kokikoki3078]

They've been hit by Weakapipo's steel ball.

[@Starfloofle]

this is frankly terrifying really demonstrates how fragile anatomy is. Eesh. The sooner it all gets figured out and we can have sturdy backups in case of damage to the brain, the better.

[@YraExalgaSkgs]

As for the visual reaction its makes a lot of sense. Those nerves of the eye pass through the whole brain and could explain why these individuals only experience the world outright from the left lobe. Even though studies have proven our brains intercept the visual information after it passes the cognitive cortex we simply don't see it until it reaches the occipital cortex. This means our entire brain is subconsciously aware of what is happening and what is around us but only consciously aware by lobe.

[@kraneiathedancingdryad6333]

'Half the world cries, half the world laughs... Half the world tries to be the other half..... ' -Rush, "half the world"

[@Mountlougallops]

Fascinating

[@bobvogel9916]

My father had a stroke and developed this condition. It was weird to watch someone who used to be an engineer eat half a plate of food and say "I'm still hungry." You spin the plate, he says "Thanks" and continues eating. And, he could never learn that he could only see half, or to spin the plate. Made me realize just how weird things can get.

[@BadgerLord]

please please, i need that study you described about alterating behavious based upon showing a word to their neglected side!!

[@BeaChapman]

This is absolutely insane

[@MrTiredHuman]

Were there every a case when someone had both Hemispatial Neglect and Split brain?

[@dhawthorne1634]

I'm sure there were, but seeing as severing the corpus callosum hasn't been used to treat epilepsy for quite a long time, I doubt there is documentation of it outside of the (now deceased) patients medical charts.

[@ikeekieeki]

this amazes me

[@mbaraka9523]

chills

[@terryh.9238]

wow this is actually a great tip... now i only have to wear ear buds on one of my ears as i fall asleep

[@DogsaladSalad]

happened to me in november during a stroke. mega trippy

[@SaucerJess]

Happy brain injury awareness month 💙

[@yashnanda6413]

Hank Green is the bestest host ever! I honestly wonder sometimes... How does he do it?

[@Fantastic-clock-272]

I have left neglect and everything he said in this is true. It’s so shitty, I’m always stubbing my left toes and bumping into things on my left side

[@aellalee4767]

I wonder if hemispacial neglect when falling asleep always happens on the left or usually. I am a side sleeper and often lay on my right side, and hear lots of noise from other tenants in my left ear. I wonder if this is because I'm not sleepy enough yet and feel comfortable on my right side to reduce how much I hear. Or if I am part of the less common group and hear less on my right side.

[@christelheadington1136]

My sinuses are constantly filling on the side I lay on, and affects the hearing in the down ear, as soon as I roll over, it switches.

[@darrylarsenault5005]

thanks Mathew Brant

[@Gamerdude753]

Strange coincidence. I was just listening to an Audible book a few days ago that briefly mentions this condition and they made this video yesterday. Did you bug my phone Hank?

[@lostaname64]

Oh great, so left-half attaxia from Jojo's Bizarre Adventure Steel Ball Run is real

[@TheNewsDepot]

So Two Face might be a split personality each with Hemispatial Neglect for a different side of the body...cool.

[@noiJadisCailleach]

oh man. That would be fun to write. A new twist on two face's character.

[@bonhll8070]

I mean i guess a fictional character can have anything even if it’s not possible irl lol

[@TheNewsDepot]

@@bonhll8070 Sure, but the more layers of reality you can slap on them, the more dimensions they feel like they have.

[@sighthoundstars]

That sounds quite terrifying actually. Also, I heard of surgery for stroke victims where you actually have half of your brain removed, I wonder if the side effects are similar? Even if the causes are different?

[@Fancylvania]

That procedure is for extreme epilepsy. There's a few mini documentaries on it if you can find them. Really fascinating.

[@photonicpizza1466]

To make your search easier, the procedure is called hemispherectomy. There's also a related procedure that is somewhat more common, corpus callosotomy, where the corpus callosum, the "bridge" connecting the two hemispheres of the brain, is partially or completely severed, meaning the two hemispheres can't "talk" to each other.

[@sophierobinson2738]

very similar.

[@thepip3599]

That’s for epilepsy. My dad is a psychiatrist and he actually has a really funny story involving that. A woman sent their daughter to him because the daughter walked with a limp, and she was convinced she was faking it. My dad checked the daughter’s medical history and discovered that she had half of her brain removed during early childhood. It turned out she really was faking it. She only did it when her mother was in the room! Otherwise, she was completely fine. The half of her brain had been removed so early in childhood that her brain was able to re-wire itself to function normally.

[@michaelprozonic]

I had a stroke and suffer from left homonymous hemianopsia which means i have no vision of any objects on my left side field of view. It is totally gone. (No, I do not still drive a car ) It also causes some other weird things like when reading a number or word, my brain will sometimes cut off the first letter or number and replace it with another letter or number. It took me about a year to be confident enough to walk out in public places alone without holding on to someone. I was chosen for an experimental study that was hoping to re-train my brain to reconnect my vision but unfortunately I was in the control group so it made no difference. If the treatment is successful I will get in the program again at no charge,,

[@KOKO-uu7yd]

Dang! And GOOD LUCK!! Years ago, my spouse was able to be a part of a study for a heart condition. I was really grateful he had the actual procedure. My dad and step-mom were both in a study for Lyme disease. About 3 months in, it was pretty clear one had gotten the preventive and the other was part of "control". Every person that participates in studies like these, helps other people down the line. Thank you.🥰🥰 I truly hope you get actual, real benefits yourself from participating, and SOON! Take care🌞🌅

[@camramaster]

This SUCKS when it's the primary neurological symptom of a migrane.

[@athenachristinemusic]

This is crazy

[@oOoKaylaGirloOo]

The Green brothers would be thee coolest teachers in high school

[@phrenologygroyper]

God I miss Gyro Zeppeli so much

[@philwood5288]

Could this have any relationship to handedness?

[@VeggiePun]

I wonder if this could have anything to do with what your dominant hand is. Like if you neglected your right side, recovery could be easier if you're right handed because you would still use that side a lot.

[@erikziak1249]

This might explain why I fall asleep better with my left ear on the pillow than with my right ear on the pillow. Because I tend to hear my pulse in the ear which is pressing on the pillow when I am in my quiet bedroom when I go to sleep.

[@cwaldrip]

What about left-handed people?

[@johnopalko5223]

As a southpaw, I was wondering about this, too.

[@eeach]

+1

[@sobgray]

I think this is how I coped with an extended period of neglect

[@sobgray]

I had to focus entirely on what I was saying rather than what was real

[@nicolasgilly1452]

Only saw first half of video... when’s the rest coming out

[@spindash64]

Thinking about this makes me irrationally angry and I don’t know why

[@danielm.1441]

Can we have a video where Hank just says the word 'lobule' over and over please?

[@dotech4128]

This is super bizarre

[@scalpingsnake]

Life is all about perception. Change your perception and you change reality.

[@Monody512]

So does this mean that the failure rate of noticing things should be lower on your right side? Also is all of this flipped in left-handed persons?

[@Izandaia]

And if you're really unlucky, it'll drive you to rip out people's right eyes.

[@km1dash6]

Can someone with this condition come to realize they have it.

[@Debble]

Question: what is the science behind retail therapy?

[@crovax1375]

The brain is a really amazing organ. I wish that people used it more often!

[@robertidonotsharemyfullnam496]

0:02 Image... all the people. XD

[@randomtraveler8594]

Is it anything like when one side of a fish will go to sleep at a time so that it can continue moving continuously? Or is that just a strange coincidence?

[@LilithLorenz]

If I cover my left ear and eye, wouls I fall asleep faster then?

[@lb2791]

So does this mean driving on the left side of the road is safer because when people get tired they still notice oncoming traffic?

[@TheTwick]

Does this have anything to do with the hand dominance (right vs left handed)?

[@chillaxter13]

Question... If the left side of the brain controls the right side of the body, which side does it process sensory input from? Pretty sure I've heard this but can't remember. If they were opposites, this would make a ton of sense where balance is related.

[@Jebbtube]

Am I the only one who heard "Losing half the world," and thought the Coronavirus was gonna get even worse?

[@migi_daveney]

Does anyone know the name of the 2013 research paper exploring the effects of visualising spaces in memory? It was from an Italian group

[@Ascendant_Sage]

That is pretty interesting I wonder if any of that is related to why most people are right handed.

[@zemorph42]

Half of my body frequently disappears from my consciousness, to the point where I can't put anything in my left pocket because I'd forget it exists. I have cp.

[@zemorph42]

Yeah my brain was damaged in the right-front lobe, far from the inferior parietal lobes, according to the illustration in the video.

[@DarkLadyPhoenix]

3:40. Sounds suspiciously like asking a left handed person to do a right handed task and they do it. Ask a right handed person to do a left handed task and they just can't.

[@mettehansen9754]

so what would the reaction be of these patients when they need to turn left on a road ?

[@SashyGryphyth]

I'm wondering if it's at all related to dyslexia when words get switched and such, especially after mentioning one of those lobes is involved in language processing.

[@jtalfes]

Does being left handed change which side you neglect as you fall asleep?

[@robertt9342]

I wonder how they would draw a circle?

[@crtusr]

What happens if you make them draw something with the right eye blocked?

[@fernbedek6302]

Does the side forgotten correlate to handedness at all? It seems like a right handed person could forget their left side more easily than a left handed person?

[@Finkelfunk]

No. It correlates heavily to the side the stroke was on.

[@raidaruca6968]

I neglect the other side of my notebook when I'm writing

[@joseft2674]

I had to check if I was listening to him on 1/2 speed 😅

[@klmn1596]

Sir if we have any treatment for that ?When it is possible could you please replay me sir

[@acelegend4289]

first thing i thought was “left side ataxia”

[@Sunflower-vp8bc]

The right side can attend to both left n right sides of the world, so with a left sided lesion, the right parietal would compensate. But in right sided lesions, the functioning left brain can only attend to the right side of the world