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Discover and read the best of Twitter Threads about #NeuroThursday

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#NeuroThursday is back this week to talk about the #neuroscience of #synesthesia. What does it mean for a letter to have an intrinsic color, for a number to have a distance? And why the heck would this trait evolve in humankind?
Synesthesia is when "stimulation of one sense automatically provokes a secondary perception in another." The secondary perception can be direct ("9's are red") or associative ("9's make me think of red"), either counts.
Synesthesia comes in countless forms, but color-based are the most frequent. The most well-known is "grapheme-color" synesthesia, where a grapheme (written shape, e.g. letter or numeral) has a color - like the opening picture.
Read 38 tweets
The Madness of Brains™ has been in the news this past week with the Yanny/Laurel effect. Let's use this as a #NeuroThursday peephole into the mysteries of human hearing – via something called the McGurk Effect.
First off, if you haven't dug the Yanny/Laurel thing, there's a great explanation and manipulation up at the New York Times.…
But @mattdoveywriter alerted me today to a better auditory ambiguity! Try listening for the words "Brain Storm." Then replay it, listening for the words "Green Needle."…
Read 21 tweets
By popular demand, #NeuroThursday will tackle last weekend's big psychological finding in the author world: this study that supposedly claims people read faster with 2 spaces after a period.…
The upshot is: some researchers got a group of people who naturally write with 1 space or 2 space, and made them read both kinds of text. The two-spacer people read a tiny bit faster when they saw 2-space text. But.
Now, there's an easy answer why this article is wrong. Let me start there and get it out of the way so I can then tell you something more subtle & interesting.
Read 36 tweets
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Hello, friends and lovers of science! #NeuroThursday is gonna lurch back into action with the other side of how you stay balanced: your body's position-sense (proprioception) system.
As a reminder, our last #NeuroThursday discussed the vestibular system: the tools your brain uses to maintain your balance. But that stuff is all in your head, so today we go to the rest of your body.
Proprioception is the original "sixth sense." It's a major sensory apparatus spread across your body, telling you critical information, but it's all so smoothly integrated you almost never have to think about it consciously.
Read 29 tweets
I hope you all are ready to help me welcome #NeuroThursday back in action this week with a story about how you stay balanced - and the amazing things you accomplish with that ability!
This topic was requested by the illustrious @KJKabza, who wondered: "Are there special strengths of the human balance system (we all know that it is easily disrupted if you spin around)?"
Yes, KJ, oh yes. Your balance system is doing highly badass things all the time, quietly under the hood while you go about your life. Like the devil, its best trick is making you think it's not even there.
Read 27 tweets
#NeuroThursday returns this week to conclude our series on Your Brain Lies To You.

The greatest trick your brain ever pulled was convincing you that "you" exist, in a conscious sensory experience across time.
If you're just tuning in, this mini-thread over here will link you to February's lead-in: how your brain fills in the gaps of your visual experience without your notice.
Your brain - in the visual system alone - uses guesswork and inference to create a complete sense of space, acuity, color… and, as you'll see today, time.
Read 28 tweets
And now, I take a auick #NeuroThursday break from this grant-writing to draw you deeper into the rabbit-hole of how we perceive so much less than we think, all the time.
This is a follow-on from last week, where I explained how our precise/color vision is only good right at the center of our gaze.
But it doesn't feel like that, amirite? Big wide world out there, in full color and high definition!

Don't believe it. As my long-time readers know: your brain is full of lies.
Read 22 tweets
Last week, #NeuroThursday made this shocking claim. This week, the time has come to unpack it, and ask the big question: what are we actually seeing, and what do we only think we see?
First off, a clarification: in that quote, I simplified for speed and clarity. It's not that we have *no* color vision in our periphery. It's just that we have *less.*
But the point is the same: in your daily life, your whole vision seems perfectly colorful. But it's not! Your brain, that devious creature, is lying to you yet again.
Read 35 tweets
#NeuroThursday may have grown sporadic under my sciencejob deadlines, but it's back this week! Thanks to @tithenai, we shall discuss "the choke:" when you freeze up on something that should be precisely your area of mastery.
We've all experienced some form of this. You have to explain your process, and no words come. You have to perform (on the stage, on the pitch), and everything locks up. Once it begins, it's self-perpetuating: hard to un-choke while you're panicked about choking.
There's a fair amount of scientific research on this, from sports-science and psychology. But in some ways, the explanation is so simple, it's something we've already covered here: skill memory.
Read 24 tweets
A special #NeuroThursday for the winter #solstice: how we see darkness and light on the scale of hours, days, and seasons!
Most people know the basics of visual perception, the rod and cone cells that let us see color and contrast. But I'm here today to talk about something more obscure: how we detect days and seasons.
(But I could discuss some fun tricks of the visual "basics" in the new year, if that sounds fun!)
Read 21 tweets
A quick #NeuroThursday this week, on the topic you've all been waiting for: Harry Potter and the Principles of Neural Science!
Credit to @muchredink for suggesting I do this, based on my version of the "Harry Potter & [the closest book to you]" meme a few weeks back.
Not a lot of neuroscience in HP, it's true. But those stories do contain one striking element that has a neuroscience explanation.
Read 22 tweets
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