Cambridge researchers have shown that members of the public have little trouble in learning very quickly how to use a third thumb—a controllable, prosthetic extra thumb—to pick up and manipulate objects.

The team tested the robotic device on a diverse range of participants, which they say is essential for ensuring new technologies are inclusive and can work for everyone. The results are published in Science Robotics.

An emerging area of future technology is motor augmentation—using motorized wearable devices such as exoskeletons or extra robotic body parts to advance our motor capabilities beyond current biological limitations.

While such devices could improve the quality of life for healthy individuals who want to enhance their productivity, the same technologies can also provide people with disabilities new ways to interact with their environment.

Dani Clode, a collaborator within Professor Makin’s lab, has developed the Third Thumb, an extra robotic thumb aimed at increasing the wearer’s range of movement, enhancing their grasping capability and expanding the carrying capacity of the hand. This allows the user to perform tasks that might be otherwise challenging or impossible to complete with one hand or to perform complex multi-handed tasks without having to coordinate with other people.

The Third Thumb is worn on the opposite side of the palm to the biological thumb and controlled by a pressure sensor placed under each big toe or foot. Pressure from the right toe pulls the Thumb across the hand, while the pressure exerted with the left toe pulls the Thumb up toward the fingers. The extent of the Thumb’s movement is proportional to the pressure applied, and releasing pressure moves it back to its original position.

  • Riskable
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    221 month ago

    If people are having no trouble with that they need to start testing tentacles.

    • @[email protected]
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      11 month ago

      It’s an interesting piece of research, but I don’t expect anytlike this to become mainstream.

      One thought I had was that music could become more accessible in some ways, while also potential for new composition.

  • JackGreenEarth
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    41 month ago

    Sure I’ve seen this before, would be cooler if it was controlled by nerves rather than a pressure sensor.

    • @[email protected]
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      101 month ago

      It’d be way cooler if it was physical tethers instead of fucking bluetooth.

      The added dexterity is very enticing to me as someone who primarily does finnacky shit with their hands. But just the potential of a “forgot to charge my thumb” situation is a deal breaker.

      • spicy pancake
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        41 month ago

        kids these days only wanna eat hot chip lie and charge they thumb

  • @[email protected]
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    41 month ago

    I’ve had the hypothesis that our brains are more general purpose than specific to our bodies for a while, based on things like how quickly and fully we can adapt to using tools and vehicles. As well as people who have a mutation for an extra finger being able to use that finger. We learn how contracting and relaxing various muscles causes our bodies to move and use the same mechanisms to figure out how to control vehicles or aim tools.

  • GingaNinga
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    31 month ago

    sounds kind of fun, would help typing, gaming, using tools…

    • ferret
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      31 month ago

      I don’t think prosthesis like this are at a level where they can meaningfully contribute to typing

  • @[email protected]
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    31 month ago

    Just learn to use your pinky finger sideways and it’s like a second thumb on that hand. I’ve been doing that for years and it feels right to me now. Most people tend to neglect the use of the smallest finger, preferring the familiar strength of the other larger digits, but the pinky can be trained to be more useful.

  • 🇰 🔵 🇱 🇦 🇳 🇦 🇰 ℹ️
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    1 month ago

    This thumb and the experiment I saw that gave people an internal compass similar to a bird with just an EEG cap have me wanting so many body mods that could technically exist…

    Fellow furries: Imagine having a wearable tail that moves based on signals from your brain so it actually wags when you’re happy or excited. Imagine also being able to feel it as if it was part of your body. That shit is actually possible right now. It’s not perfect (feeling things is more of a “phantom limb” sensation because there are no actual nerves), but I’m still stoked.