Man Controls Both Prosthetic Limbs With Mind

Recently, Lesie Baugh, who lost both his arms to a freak electrical accident forty years ago, was able to move both his prosthetic limbs to perform daily tasks with just his mind! We have seen in the past one limb being moved, but moving both has never happened before.

Moving both of Leslie's limbs with just thought was a two step process:

1. A surgical procedure known as targeted muscle reinnervation is done first. This surgery reassigns nerves that once controlled the limb. This reassignment is vital for the mind to interact directly with the prosthetic limbs.

2. After the surgery, researchers worked with Leslie to identify which muscles of his contracted, and how well they interacted with each other. This is necessary to find patterns and to calibrate the limbs so they respond to the right signals.

Once the pattern recognition was done, Leslie was fitted with a custom socket that connected his limbs directly to his reinnervated nerves. Using his mind, he could do basic tasks like lifting a glass from one shelf and putting it on another, and grip a ball and move it to a different location. 

The next step is to have Leslie use his limbs in the "outside world" and see how it works for him. He desires to use it for simple things like putting change in a pop machine and getting soda out of it.

The researchers who have been helping Leslie think that this is just the beginning, and that the next 5 - 10 years will bring wonders to the world of prosthetics.

Watch the video below to see Leslie control his limb with his mind, and hit the source link for more details.

Source: Science Alert

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3D Printing And Prosthetics

This is the first of (hopefully) many to come in the future. This is a very basic primer on 3D printing and how it can be used effectively to print efficient and very cheap prosthetic limbs. I have created a "Sway" too that I will be updating on a regular basis to keep the content up to date and meaningful. It is also easier to share the "Sway" with family and friends. It can be accessed here:

3D Printing & Prosthetics

If you prefer the regular blog format then read below.

What is 3D Printing?

In simplest of words, 3D printing involves printing actual objects. It is not manufacturing or creating, simply printing! And why is it called 3D printing? Because it involves a printer that connects to a computer.

The basic idea is that if you have designed a product in a CAD software, it can be printed out layer by layer using a 3D printer. There are several types of 3D printers available that use different technologies to print.

Some printers use powdered material (Selective Laser Sintering or SLS) while others use plastic or metal wire (Fused Deposition Modeling or FDM) or resin (Stereolithography).

Additional Reading: What is 3d Printing

Why is it such a big deal?

The basic principle of a 3D printer dictates that you can print objects with it. That's cool and all, but what is it about 3D printing that is causing such a huge commotion? See, what's amazing about 3D printing is that it cannot just print objects, it can print useful objects. VERY useful objects. So useful that those objects can save or extend people's lives.

Let's start with the basics.

We are not using ink - we are using glass, plastic, powder among other things to 3D print, which essentially means that we can print just about anything with a 3D printer. It's not easy to fathom the extent to which 3D printing can go. It is both mind blowing and baffling to know that 3D printing can print anything from a cute little toy to a life saving organ. Just recently, a major breakthrough in the 3D printing space allowed 3D printed tissue to survive on its own. Such breakthroughs have led to important organs like kidneys to be developed for transplants.

3D printing is fascinating.

3D Printing For Prosthetics

It's a no brainer that since we can print anything with a 3D printer, we can print prosthetics as well. There are more than 10 million amputees around the world [1]. Arranging a (traditional) prosthetic limb for them is always a challenge because of the cost involved which can range anywhere from $20,000 - $50,000. These exorbitant costs can deter anyone from pursuing an important accessory that will enhance their lives, more so because insurance companies do not cover the costs of prosthetic limbs especially for little children because they outgrow their prosthetic limb very quickly.




However, not surprisingly, 3D printers have come to the rescue of people who need artificial limbs. It is unbelievable how easily a limb can be printed by a 3D printer - layer by layer, that functions just like a traditional prosthetic limb. Believe it or not, a 3D printed prosthetic hand can cost anywhere from $5 to $100. That's it! And because of that, people are more willing to experiment with the design to come up with more efficient limbs. Outgrowing a prosthetic limb is not a worry anymore either.

Projects

There are several voluntary organizations out there that are making 3D printed prosthetic hands available for amputees at a very affordable price.

One of these organizations is Open Hand Project that makes prosthetic hands available for less than $1,000. It is an open source project which means that all the information required to create a

prosthetic hand using a 3D printer is readily available to the entire community on their website. Anyone who adds improvements to the project are shared with the entire community.

Another volunteer driven group is called E-nabling The Future which consists of engineers, students, teachers, occupational therapists, designers amongst others. This group helps print 3D prosthetics for those who need them, and the cost to print a hand may run anywhere between

$20 and $50.

Endless Opportunities

What you have read here is just the beginning. There are tons of innovations being made in the world of assistive technology using 3D printers on a regular basis! 3D printers are getting cheaper by the day, which means that more and more hobbyists and designers are getting their hands on them, fueling creativity and collaboration and taking 3D printing to a whole new level!

Last, But Not The Least

3D printers. If you or someone you know is interested in knowing more or using 3D printers, this link should be a good resource to get you started.

Sources: 

Images:

Cover Image [1]: Parade's Community Table

3D Printers Comparison Chart: Tom's Guide

Additional Sources:

[1]: Forbes

Man Compares His $42k Prosthetic Hand to a $50 3D Printed Cyborg Beast, Dad Uses 3D Printer To Make His Son A Prosthetic Hand (VIDEO), New 3D bioprinter to reproduce human organs, change the face of healthcare: The Inside Story

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Prosthetic Hand Lets Amputees Feel Texture Of Objects

Over the years, prosthetic hands are becoming more and more viable for people who lose their hands in accidents or were perhaps not born with one. Prosthetic limbs are great in that they help the users get back to daily routine operations. The one thing that most prosthetic limbs don't do however, is allow the wearer to feel the texture of objects that they grip. Scientists at Case Western Reserve University in Cleveland, OH have taken the prosthetic hand one step ahead by adding sensation and "feel" to the hand they have created. 

"Touch perception on the fingers and hand is essential for fine motor control, contributes to our sense of self, allows for effective communication, and aids in our fundamental perception of the world." ^[1]

Turns out, sensation is not felt or generated by a hand but by a certain part of the brain. When a person lose their hand, they inherently lose the input that switches on those parts of the brain responsible for sensation. By sending electric signals by a computer into nerves in the user's arm and eventually to a specific part of the brain, sensation or touch can be reactivated.

Igor Spetic, a man who lost his right hand in an industrial accident in 2005, says that he can see his arm hair raise when a cotton is brushed against his prosthetic hand.

Since the amputees can now feel the texture of the object they are handling, they also know exactly how much pressure to apply to form their grip without damaging the object. With other prosthetic hands, gripping tomatoes and grapes meant creating juice instantly!

Currently, this arm can be tested and improved only in a lab setting, however, the team plans to create an implantable hand in the next five years so it could be tested at home. Detailed description of how this hand works was published in this article.

Watch the video to learn about all the research that has been going on to make this hand a success.



Source: CWRU via Gizmodo, Science Translational Medicine [1] 

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Google Glass For Prosthetics And Blind Athletes

Google Glass, 3D printing, Prosthetics! We have heard so much about these in the recent past, and we will keep hearing about them since things are progressing so well in each of these avenues! Today, we have two different stories related to Google Glass - one, that will help people get cheaper prosthetics, and two, a blind paralympian using Google Glass to show kids his point of view and boost their confidence.

Prosthetics With Google Glass

Traditionally, getting prosthetics requires traveling to a clinic where a huge measuring machine with a robotic arm determines the specifications for the needed leg brace or prosthetics. Of course, this process is not inexpensive since the machine itself costs tense of thousands of dollars, and typically, the clinic would like to pass on costs to clients.

This will soon hopefully change. A research team at University of Delaware is exploring more affordable and convenient ways to do the exact same thing, but without the additional exorbitant costs of getting prosthetics from a traditional clinic.

The team is using Google Glass to capture all the information of the foot and lower leg in videos. These videos are then stitched together to get a 3D model of the cast and then instantly transformed into a template for a 3D printer. This method will first of all, cut down costs for the patients and second of all, make it convenient to go through this process at home without even going to the clinic to get the measurements taken. The patient can print the leg brace at home if they have a 3D printer or send it to a 3D printing lab or studio.

The team will soon be applying for funding to expand into prosthetic manufacturing as well.

A combination of technology like Google Glass and 3D printing helps bring manufacturing to everyday consumers who are not engineers or manufacturers.

Google Glass And A Blind Paralympian

Disability advocates are always looking for different ways to showcase abilities, and not disabilities of disabled people. Google Glass will be used for just that purpose.

Lex Gilette is a blind paralympian who began to lose his sight when he was seven years old. He has won three silver medals and holds the world record for long jump for F11 classified athletes. Being blind, he has to depend on someone to direct him down the runway and make calls for him on the fly.

"No need for sight when you have a vision."

Lex's plan is to wear Google Glass and show his perspective to high school kids so they could see what all it entails, and how a blind paralympian does it. The idea is to show kids that everything is possible, and how being not able bodied does not cause hindrance to your goals. Through Google Glass, Lex aims to make high school kids more confident.

Hit the source links to read more about both the stories.

Source: Newsworks (1), Fast Coexist (2)

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3D Printed Exoskeleton

What is it that 3D printers cannot print? "Nothing" is probably the most accurate answer!

Artificial limbs, that are usually not very cheap and easy to get are easily becoming quite affordable. To take things a step further and make things more exciting, a 3D printed exoskeleton was given to Amanda Boxtel, who has been paralyzed from waist down since 1992, enabling her to get off her wheelchair and walk again. She was told by her doctors that she would never be able to do so!

The Ekso-Suit, designed specifically for Amanda, was made possible by designers at 3DS. To make sure that the exoskeleton fit her perfectly, they started by scanning the contours of her thighs, shins and spine and digitizing all that information to create the 3D base for the exoskeleton, which was then integrated into other mechanical components to create the full automated suit. One important factor they had to consider while designing the suit was that since Amanda did not have any sensation from waist down, they didn't want any of the components poking into her skin as that would have caused abrasions. Since Amanda has no sensation in her legs, those abrasions could have formed dangerous complications.

This 3D printed Exoskeleton is a big step towards making such accessories available to the common masses at prices substantially less than other commercially available solutions. 3D printing in the coming years is going to bring lots of exciting yet inexpensive enhancements to the assistive technology world!

Watch this video to see all the components the Ekso-Suit is made of. Also see Amanda Boxtel walk with the Ekso-Suit on!

Source: 3D Systems via Gizmodo

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$100 3D Printed Prosthetic Limb

3D printers are all the rage these days. From children's drawings to a working gun (GASP!), there is practically nothing impossible to print using one of these.

Mick Ebeling, CEO of Not Impossible Labs decided to do something when he read about 14 year old boy Daniel losing his arm in a bomb blast in war torn Sudan. Mick landed in Sudan with a few laptops and 3D printers, with the sole objective of making Daniel a limb.

Daniel was located in a refugee camp in Yida, South Sudan, and was given his first "version 1" limb by Mick. The limb took around $100 in raw materials and the 3d printer was able to print it out in just six hours. For the first time in two years, Daniel was able to feed himself (he had chocolate!). The video below show him doing daily activities like using a touch screen computer and throwing a ball. From what is shown, it looks like adapting to the new limb is fairly quick.

Before leaving Sudan, Mick set up a lab so the locals could print artificial limbs themselves.

Version 1 of the limb does come with some limitations. It cannot be used to lift heavy weights, and to use utensils, additional accessory is required. But still, the levels of  independence and confidence they bring to the person wearing them are enormous. Mick has made the project open source so anyone could work on it and keep improving version 1. The vision here is to create a global campaign that helps amputees from around the world achieve independence with a product that is inexpensive yet reliable. Version 1 can help someone get adjusted to artificial limb quickly - If someone needs something more robust, they can perhaps upgrade to other options.

Source: Inhabitat
More here: Not Impossible Labs


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I-Limb Ultra: Prosthetic Hand Controlled By iPhone App

Someone once sad �there�s an app for that,� and they weren�t wrong! In today�s society, everyday life is being made easier by apps on smart phones which can do anything from letting us check our bank balance on the move to helping us avoid the traffic on the school run. But the category that has shown the biggest boom in downloads are the medical apps. These range from apps that can help patients to control their long term illnesses, to apps that can allow doctors to visualise their patient�s x-ray radiographs on the move. 

One app that has made a big difference to patient�s lives is the iBGStar Diabetes Manager, and other
apps like it. They are used by diabetic patients to measure their blood sugar levels and keep track of previous reading to ensure they have good control over their condition. This is not only easier for the patient than the old �diary� method of recording their blood sugars, but it can help their doctors to see how treatment is working for their patient and whether it needs to be changed.

The award for the most innovative and life changing app must go to the i-Limb Ultra from Touch Bionics: the app is connected to a bionic prosthetic hand via Bluetooth and users can select different �grips� for any specific tasks they need to do. Sounds like something out of a movie, right? That�s what 16 year old Patrick Kane thought when he was fitted with the bionic hand. He lost his
hand as a baby due to meningococcal septicaemia, but because of this revolutionary new device he is able to live a normal life again, something that we often take for granted. The hand allows Patrick to carry out movements that are so precise they have not been possible with a normal prosthetic in the past: he can now hold a glass, pick up a piece of paper and tie his shoelaces with the touch of a button on his iPhone.

The limb can be controlled by electrical signals in muscles as well as by the iPhone, but this does take some practice to master as Patrick has already learned: "Controlling the hand feels very natural, although it does take a bit longer to learn how to use the automatic grips and gestures, so it was very useful to be able to work with the Touch Bionics therapist on these skills."

This innovation is a huge step for people like Patrick. At the moment the limb is still very expensive, between �30,000 and �80,000, but this technology means that in the not so distant future people that have lost a limb will be able to have the same quality of life as those who haven�t been so unlucky.

You can read the full article here.

This article was written by Niqui Stubbs, a 4^th year medical student with a love of gadgets and technology. She has worked with people who have lost a limb and knows the huge impact a bionic limb like this can have on someone�s life.

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Scientists Restore Hand Function In Paretic Monkey Using Artificial Neural Connection

Spinal cord injuries or strokes usually result in loss of limb control. Typically, these injuries cause interruption of the pathways that conduct impulses from the brain to the spinal cord. However, it is known that the neural circuits above and below the lesion still remain functional.

Recently, a combined effort between scientists from University of Washington, Seattle, Japan Science and Technology Agency, and National Institute for Physical Science, Japan did an experiment on a monkey with a paretic hand to see if they could restore neural activity in its hand and create natural limb movement without the help of any artificial limb. The results were pretty impressive.

The team used two approaches - first, they applied an artificial neural connection to bridge the neural

circuits above and below the lesions on the partially paralyzed monkey. This partially restored strength in the limb and allowed the monkey to move its arm purely using brainpower. Second, they also created another circuit that helped stimulate the spinal cord, thus boosting ongoing activity in the muscle.

These experiments have shown tremendous promise in curing semi paralytic people and restoring natural movement in their limbs without the need of any artificial/bionic limbs. We should hopefully get more promising news in the near future! 

Check the source links for more details. There's also a direct link to a pdf of the full paper.

Source: NIPS, Frontiers via Engadget

PDF

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Bebionic3: Prosthetic Arm For Daily Use

In the last year or so, we have seen quite a few prosthetic limbs in the market that are just remarkable in their own way - from helping people pick up things to offering touch and feel. Rapid developments in this area only go to show that people are actually accepting prosthetic limbs as a good substitute for a real limb.

Nigel Ackland, who lost his arm in an accident six years ago, was fitted with the Bebionic3 just last November, and already he can use the arm so seamlessly and flawlessly to perform daily chores - from tying shoelaces to making an omelette.

I think the Bebionic3 is the only prosthetic arm (as far as I know) that comes with its own silicone skin to give it a natural appearance. The hand also comes with its own software that can be monitored and configured wirelessly. Make sure to check out the website (source link) to learn (a lot) more about the gripping mechanisms, components it is made of, and all the technical information.

Nigel Ackland, everyone.


Source: Bebionic.com via Gizmodo

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Bionic Hand That Offers Touch And Feel Real Time

The last few years have seen a tremendous amount of progress when it comes to prosthetics. However, one limitation of these prosthetic limbs (if it is one) is the lack of sensation - clinching an object does not invoke a sense of touch since the limb is not connected to the nervous system.

Recently, scientists at The �cole Polytechnique F�d�rale de Lausanne and Project Time have developed a new bionic hand that has sensors on the fingertips and connects to the nervous system of the amputee by implanting electrodes directly in two important nerves - median and ulnar, and deliver signals directly, thus enabling the person to feel the touch. Essentially, the limb is controlled by thought as well as receives touch signals from the hand sensors.

Feeling the touch/sensory signals is essential because the more sensory signals the amputee gets, the more likely the patient will fully accept and appreciate the limb.

The scientists are constantly improving and refining the interface for this limb and if all goes well, a full working model will be ready for testing in two years.

Source: The Independent, Project Time, Gizmodo, Engadget
Images source: Engadget, The Independent

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Controlling A Prosthetic Arm With Thought

Image source: BBC

What we used to see a few years ago in movies is turning into reality. Controlling objects with just your thought? Who would have ever thought?

Jan Scheurmann, a 53 year old quadriplegic who is paralyzed from the neck down, recently managed to control a prosthetic arm with her mind to grasp and move objects with ease.

Two sensors were implanted in her brain that pick up electrical signals from around 200 individual brain cells, which later translate into commands that are used to move the arm and grab objects. The co-ordination, skill and speed she achieved only after 14 weeks of training (she was picking up objects on the second day!!) was almost similar to that of an able bodied person.

Image source: BBC

The next plan is to attach the prosthetic arm to Jen's wheelchair so that she could use it on a daily basis. There have been attempts to give sensation to the prosthetic arm as well so that Jen could feel the sense of touch.

This development is huge for people with spinal cord injuries, amputees, and quadriplegics. We saw something similar earlier this year, and looking at the progress, we should see a lot more action in this area in the coming years!

Hit the source links to read more about this in detail.

Source: BBC, The Lancet via Gizmodo

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Touch Bionics Releases New Prosthetic Fingers

Image source: Engadget

Touch Bionics, a leading expert in prosthetic limbs, recently announced the global launch of new bionic finger technologies - a very good news for people with missing fingers.

The new additions to the product line include a finger that's shorter and lighter, and a wrist band that incorporates all of the processing and poer systems of the prosthesis.

This new development  enables prostheses to be made smaller, lighter and more anatomically accurate, e.g., for people with smaller hands and whose amputations are closer to the knuckles. 

Needless to say, these prosthetic fingers help people perform daily chores and activities, and pursue their hobbies and interests, thus boosting their self confidence and improving their quality of life.

Watch this video to learn about the benefits of prosthetic fingers.

Check out their website to learn more about the prosthetic fingers. To read the press release, hit the source link.

Website: Touch Bionics

Source: Engadget

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WREX: 3D Printer Used To Print Exoskeleton For Two Year Old Girl

Image source: Digital Trends

Meet Emma, a two year old girl who was born with a condition that prevented her from moving her arms. The condition, called Arthrogryposis Multiplex Congenita (or AMC), causes the joints to stay in one position permanently. Little Emma could not move her limbs, which meant that she could not do what other little children like to do - draw, color, pop candy in her mouth, comb her hair, and lots of other similar fun things.

Image Source: Digital Trends

 Emma's parents attended a conference in Philadelphia where they met the developers of Wilmington Robotic Exoskeleton (WREX), an exoskeleton that helps children with musculoskeletal disabilities move their arms in 3D space. Since Emma was very little, the folks behind WREX designed a jacket that would fit her small body and weigh significantly less, and "printed" it out using a Stratasys 3D printer! The arms for the jacket are made out of the same kind of plastic used in Lego blocks, and resistance bands are used to adjust the tension in the arms. 

 Emma has already outgrown her first jacket, but getting her a new jacket was not a problem - a new one was simply printed out of the 3D printer! Emma is a happy girl now, and she can do everything that other girls her age do!

 Watch this video to hear Emma's story and watch her progress.

Watch the following video to learn more about WREX.



Source: Digital Trends

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Paralyzed Woman Steers Robotic Arms With Mind And Sips Coffee

Once there was a time when being paralyzed was a death sentence, however this may no longer be the truth. Recent breakthroughs in robotic and neural interface technology have opened a doorway for those once paralyzed. A paralyzed women name Cathy is a prime example of how modern technology is making what was once though Impossible, possible.

It starts with a simple computer chip that is inserted and planted into the brain of a paralyzed person. The chip is stocked full of software and computer recognized algorithms that have been programmed to interpret neural waves and respond accordingly. The instructions are then sent to a robotic arm that interprets the commands and acts it out. In recent trials the brain-controlled robotic arm lifted and moved a glass of water into a paralyzed women's reach so that she could sip from it, something she has been unable to do on her own for the past fifteen years.

Many tests of similar nature have been done on lab animals and have proven successful, however, this is the first time a lab trial with a human has resulted in success in real time space. Previously lab trials have been successful in computing thoughts into moving a computer cursor, however with this breakthrough all past achievements pale in comparison. However the company behind this amazing breakthrough, BrainGate, has advised it will be some time before this technology makes it outside the lab.

In the current design the computer sensor is attached to a mini-sized computer that is connected with a mess of wires. Making the system wireless is the team�s first long term goal. The research team hopes that within a decade the BrainGate device will be available for everyone with a disability at a price that will be affordable. They are also in the works of bringing this functionality to prosthetic limbs in the same time frame.

Here is a video of Cathy moving steering a robotic arm: 

The movements of the device are still clunky and not efficient enough to be used outside of the lab. However, the main goal of the test was to use the software and brain-chip in partnership so that they would work in real time. With the breakthrough of this success it has catapulted the time-frame and feasibility of technology of the same nature being commonplace forward by decades.

It is more than likely that within the next few decades we will see technology of the same nature it every part of life. Prosthetic limbs will have the capability and functionality of their real counterparts. Patients with full body disability will have control of robotic parts that they can then use as if it was an extension of their body. As technology of this nature keeps jumping forward the boundary between man and machine continues to grow smaller.

This guest post has been written by blogger Kathleen Hubert. Kathleen is a blogger who writes on a variety of different sites. Check out more of her work at modularhomes.org.

Source: Arstechnica, Gizmodo

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Bionic Eye Research at Monash University

Microchip for the bionic eye (source: Monash)

Researchers at Monash University, who have been working on a project to deliver a direct to eye bionic eye implant by 2014, have started testing the microchip that will power the bionic eye. So far, the results have been very good, which means that the project is on the right track.

The bionic eye would mainly consist of three parts - a camera that would be mounted on a pair of glasses (retina), a pocket processor that takes all the information from the camera and converts it into signals that could be understood by the brain, and cortical implants consisting of several tiles which will stimulate the visual cortex (the part of the brain that processes signals from the eyes). Each of these tiles will have tiny microchips which are currently being tested.

The aim of the researchers is to create something that is the equivalent of a seeing-eye dog or a white cane. Initially, the bionic eye would complement them, but eventually will replace them.

Pre clinical assessments for this bionic eye would start soon.

Watch the following video to understand how a bionic eye works. This video is not related to the research being done at Monash, but gives a good overview of what researchers who work on such projects try to achieve.

Source: Monash

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Prosthetics Of The Future

Ever wonder what's happening in the prosthetics world? How advanced prosthetic/ bionic body parts are, and what kind of things they can do already? Is the human leg or arm the ultimate benchmark against which these prosthetics are measured? Or can we go a step ahead and make something that is even better than the natural body parts?

Watch this video (which is a promotional video for a new game called Deus Ex) to see a guy, Rob Spence, who lost his right eye as a youngster, with a video camera installed in his right artificial eye (which was named one of the 50 best inventions of 2009). He travels around the world and meets people who have bionic body parts (eyes, arms, legs) who explain how their prosthetics function, and if they are even better than the "real thing". 

Note: Video contains a few graphic scenes.

Go here to read more about Rob Spence's Eyeborg project.

Source: Popsci

[Thanks, Travis!]

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Bionic Leg For Amputees

After seven years of hard work, researchers at Vanderbilt University have created a new "bionic" leg that is much more lighter, faster, and smarter than the regular prosthetic leg.  It is the only prosthetic leg that has the powered knee and ankle joint operating together.

 "A passive leg is always a step behind me. The Vanderbilt leg is only a split-second behind", says Craig Hutto, who has been testing this leg for several years. The Vanderbilt prosthetic walks 25% faster on level surfaces than other prosthetic legs.

The "bionic" leg has sensors that detect motion of the wearer. This data is then sent to microprocessors that predict what the person is trying to do, and acts accordingly to allows the wearer to operate the leg in ways that will make movement easier.

This leg makes it easy for a person to sit, stand, walk, and go up and down stairs and ramps. It can continuously walk for 13 to 14 kilometers (three days of normal activity) on a single charge, and weighs only nine pounds (human lower legs usually weigh more than that).

Freedom Innovations has been given exclusive rights to develop this prosthesis.

Watch the video to see Craig Hutto using the Vanderbilt prosthetic leg.

Source: Physorg.com via Engadget

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