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How do our brains adapt to control an extra body part?

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41–50 of 155 posts

Re: How do our brains adapt to control an extra body part?

#41
post #24

I wonder if they don't even need to be like traditional body parts like thumbs. Perhaps like octopus tentacles with claws on the end...

I'm wondering if you could get so used to it over time you would develop a 'ghost limb' syndrome, i.e. some discomfort/itching/confusion when the appendage is taken off.

Re: How do our brains adapt to control an extra body part?

#43
post #29

I broke my Achilles tendon - had to have a FULL reconstruction - they took a tendon that used to help waggle my big toe (the muscle is in my leg) wrapped around my heel and back up my leg and rebuilt my achilles around that - now I have a muscle that used to wiggle my toe than moves my entire foot. How hard was it to relearn? at first I'd try to move my toe and something else would move, it felt weird - but doctor's…

Yes - I'm learning singing at the moment and just the other day the teacher fed back - don't try to over-conceptualise what you're doing. Just do it, focus on the outcome, stay relaxed and the body will figure it out.

I've been through enough learning cycles to appreciate this but this was a real hurdle for me when I was young because my default was to rely on systems and rules. Ironically as a swimmer my biggest breakthroughs in speed and technique as a teenager were intuition borne out through thousands of hours of repetition but it took me many many more years and a very good piano teacher to conceptualise the art of not conceptualising.

Re: How do our brains adapt to control an extra body part?

#44
post #29

I broke my Achilles tendon - had to have a FULL reconstruction - they took a tendon that used to help waggle my big toe (the muscle is in my leg) wrapped around my heel and back up my leg and rebuilt my achilles around that - now I have a muscle that used to wiggle my toe than moves my entire foot. How hard was it to relearn? at first I'd try to move my toe and something else would move, it felt weird - but doctor's…

The human body is so wild with things like this.

What happened to your toe? Did you loose the capability to move it individually from the others?

Re: How do our brains adapt to control an extra body part?

#45
post #29

I broke my Achilles tendon - had to have a FULL reconstruction - they took a tendon that used to help waggle my big toe (the muscle is in my leg) wrapped around my heel and back up my leg and rebuilt my achilles around that - now I have a muscle that used to wiggle my toe than moves my entire foot. How hard was it to relearn? at first I'd try to move my toe and something else would move, it felt weird - but doctor's…

When I was young, my first real experience with this was seeing a black and white spiral optical illusion in a museum. I stared at it for a bit, and then my brain adjusted and when I looked away, it affected what I looked at.

I think my realization was that my brain didn't just do simple things, it did complex in many dimensions to adapt and fix things.

The same thing goes with your foot, and it goes way deeper than we realize. It's probably not that one muscle, it is ALL the muscles in the area working together to help you walk. I wouldn't be surprised if there are 50 muscles involved.

Re: How do our brains adapt to control an extra body part?

#46
post #42

I started wearing a bath robe belt as a tail and my brain quickly starts telling me I am wearing it when I am not. I also had a phantom watch ⌚ on for a week after losing it.

Sometimes I am stiff, and what I thought was my phone buzzing is my hip creaking. lol

Re: How do our brains adapt to control an extra body part?

#47
post #24

I wonder if they don't even need to be like traditional body parts like thumbs. Perhaps like octopus tentacles with claws on the end...

Dani, whom the article mentions, has also worked on prosthetic arm replacements which are indeed modelled on tentacles. I don't have a link to hand but I'm sure some use of your favourite search engine would show this for you.

Re: How do our brains adapt to control an extra body part?

#48

Marshal McLuhan's book Understanding Media had the full title "Understanding media: the extensions of man." And he had a chapter about the automobile. If you've ever had the chilling experience of a skid, the terrifying adrenaline surge during that second where it is clear the car is no longer under your control, you know the dude was onto something. The car is an extension of our bodies. An extra body part.

I have pressed an imaginary "brake pedal" with my foot many times when travelling as a passenger in vehicles with someone else driving, just because i was watching the traffic and sensed the need to slow down.

Another instancee --

In my country growing up we didnt always have "blinkers" on our vehicles (light motorbikes, scooters, bicycles) -- so it was common to use "hand signals" to indicate your intention to turn right or left. I once did "hand signal" when WALKING along a corridor and had to turn right into another corridor / aisle.

Re: How do our brains adapt to control an extra body part?

#49
The early demos from ctrl labs (aquired by facebook) were VERY interesting.

They put a sensor band around the forearm and used machine learning to interpret the electrical signals the brain was sending.

They were able to interpret intent to move before actual movement. they apparently had a perfect keyboard, but you didn't have to actually move your fingers.

What was interesting is that one of the guys working there had figured out how to have a third arm.

can't find the article. this is close:

https://www.theverge.com/2018/6/6/17433516/ctrl-labs-brain-c...

Re: How do our brains adapt to control an extra body part?

#50
post #44
post #29

I broke my Achilles tendon - had to have a FULL reconstruction - they took a tendon that used to help waggle my big toe (the muscle is in my leg) wrapped around my heel and back up my leg and rebuilt my achilles around that - now I have a muscle that used to wiggle my toe than moves my entire foot. How hard was it to relearn? at first I'd try to move my toe and something else would move, it felt weird - but doctor's…

The human body is so wild with things like this. What happened to your toe? Did you loose the capability to move it individually from the others?

No, turns out there are enough other muscles/tendons pulling on it I haven't really missed it, there's nothing obvious I can't do with it - I suspect the ones that pull it down are more important than the ones that pull it up
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