Mirror Neuron - Magnetic Stimulation [HT 092]
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What happens when the popular press runs away with an exciting neuroscience result? Barnes Jannuzi discusses one example, mirror neurons, in this week's post:
https://pennneuroknow.com/2024/03/05/all-aboard-the-mirror-neuron-hype-train/
Wow. I was reading about mirror neurons in V. S. Ramachandran’s book, “The Tell-Tale Brain” (Chapter 4).
Apparently these neurons fire (or the “circuit” they’re in fires) when a person performs an action OR they see another person performing the action. The pattern is nearly identical.
So, how does your brain distinguish between someone touching *your* hand, and someone touching someone else’s hand? In either case, the same neurons fire in the same way.
The difference is that if someone touches your hand, there is not only the visual input, but the sensory input from your skin where it is touched. So if your brain doesn’t receive that input, it knows it isn’t being touched. The skin generates a “null signal” that it communicates to the brain, and the brain perceives that its body isn’t the one getting touched.
Ramachandran performed experiments, first on a Gulf War (I) veteran who had lost his hand and had phantom limb syndrome. No hand, no null signal. When the vet watched someone else’s hand getting stroked and tapped, *he* felt those strokes and taps on his phantom hand. Ramachandran repeated the experiment with three other patients and saw the same thing.
He then did an experiment with one of his students, where they anesthetized the nerves connecting her arm to her spinal cord, and she experienced the same effect - she felt the touches that she saw being done to another person’s hand.
Ramachandran: ““Imagine: The only thing separating your consciousnesses from another’s might be your skin!”
🤯
@Mrfunkedude @_
@Mrfunkedude @_ I have a theory, ahem 🦕
There’s a phenomenon in psychology called “mirror neurons” - These are brain cells that fire in similar ways when we do something, or when we see someone else doing that thing. I think the idea is that we see someone doing something, our brain tries to recreate that action, with *ourselves in the starring role*, so we can try it on and understand it. That neural activity extends to a small amount of muscular activity as well.
There's a great experiment (that I can't track down, there's too much interference by a different study in the search results) where they had subjects look at pictures of people smiling, and the subject had to decide whether the smile was real or fake. Normally we're about 60% proficient but some groups with more experience judging emotions do better. Apparently, if you do the same test while clenching a pencil between your teeth, your score drops to random chance, 50%. You've locked up the muscles that your brain uses to "try on" the smile and decide if it feels real or not.
Okay, here's my idea. When your standard troglodyte looks at someone with purple hair, or being gay, or wearing something not made of denim, their brain creates a model where *they* have purple hair, or is gay, etc., and that makes them very uncomfortable. They're not uncomfortable with *you* having purple hair, they're uncomfortable with *them* having purple hair. You are the cause of that discomfort, so they get mad at you. You're causing them deep-seated pain, and you must be punished for that.
I’m convinced, more and more, that this is the cause of almost every reaction that makes you ask, “Why do you care? It has nothing to do with you!”
Hashtags for debate, and so people can correct my layman mistakes 😄
#Psychology #MirrorNeuron #Prejudice #Peace
Glaub ich werd' mir zum nächsten #BandcampFriday #Mirrorneuron von #SyrinxCall kaufen. Vielleicht höre ich bis dahin auch noch in die älteren Alben rein.
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