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Thursday, May 13, 2021

Magnetic Skin Supports Freedom of Movement for People With Quadriplegia | Nutrition Fit


Summary: A novel flexible, breathable magnetic skin allows people with quadriplegia to move around their environment with greater ease.

Source: KAUST

A system that uses flexible, breathable magnetic skin allows people with severe quadriplegia to move around and choose their surroundings. Developed by KAUST researchers, the high-tech system relies on the user’s facial expressions to accomplish a wide variety of tasks, from moving down the street to using an elevator.

There are a wide variety of assistive technologies for people with quadriplegia, but most systems are not suitable for patients with severe quadriplegia as they often rely on head or neck movements to work. For these patients, the options are limited to camera, tongue control, voice-assistant and neural detector systems. But these either offer a limited range of gestures or are not compatible with outdoor applications. Some also require invasive attachments or continuous attention while using the system.

“Most existing technologies don’t give people a lot of freedom,” says Abdullah Almansouri, a Ph.D. student in KAUST. “We wanted to develop a solution that works inside the house as well as outdoors, allowing them to move around independently.”

The new integrated system includes magnetic skins, smart glasses, a smart wheelchair and smart gadgets that rely on wireless Bluetooth and infrared communication.

This is a sensor described in the article
Sensors in the smart glasses detect facial movements through the flexible and breathable magnetic skin, which are converted to electrical signals that are transmitted to the wheelchair. Credit: KAUST; Anastasia Serin

The three magnetic skins are placed between the eyebrows and on each side of the nose to track facial movements, such as moving the eyebrows up and down and the nose left and right. These movements are detected by magnetic field sensors in the smart glasses and are converted into electrical signals that are transmitted to the head unit of the wheelchair.

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This unit processes these signals into wheelchair or smart gadget commands, such as turning the lights on or clicking the mouse on a computer. The system currently supports 13 distinct facial gestures.

Credit: KAUST Discovery

“We were aiming for something easy and accessible but also that couldn’t be easily triggered by accident,” says Almansouri. “The system itself handles the complexity, so the user is only wearing the glasses and magnetic skin to control their surroundings.”

With his team, Almansouri tested the system on three able-bodied users with a high success rate. The participants took less than 15 minutes to learn how to use the system without assistance, with a worst-case success rate of 93 percent.

“The synergetic combination of advanced sensor technology and machine learning will definitely improve quality of life,” says Khaled Salama, professor of electrical and computer engineering at KAUST’s Advanced Membranes and Porous Materials Center. “Thiscombinationhas the potentialto be a game-changer in so many applications.”

About this neurotech research news

Source: KAUST
Contact: Press Office – KAUST
Image: The image is credited to KAUST; Anastasia Serin

Original Research: Closed access.
An assistive magnetic skin system: Enabling technology for quadriplegics” by Almansouri, A.S., Upadhyaya, L, Nunes, S.P., Salama, K.N., Kosel, J. Advanced Engineering Materials


Abstract

See also

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An assistive magnetic skin system: Enabling technology for quadriplegics

People with quadriplegia no longer have control over their legs, neither the hands and cannot continue living their life independently. On top of that, severely injured quadriplegics (i.e., C1 and C2 injuries) suffer from speaking difficulties and minimal head and neck movements. With the advancement in wearable artificial skins and the Internet‐of‐Things, realizing comfortable and practical solutions for quadriplegics is more tangible than ever. Herein, a comprehensive assistive magnetic skin system is presented that allows quadriplegics, including the severely injured ones, to move around individually and control their surroundings with ease. The system tracks facial expressions by tracking the movement of magnetic tattoos attached to the face, using magnetic field sensors incorporated into eyeglasses. The magnetic tattoos are made of highly flexible, stretchable, breathable, and biocompatible magnetic skins. In combination with smart‐glasses, smart‐wheelchair, and smart‐gadgets, the users can move around and control their environment with their facial expressions. The system is also designed to allow quadriplegics to perform outdoor activities effortlessly. It supports line‐of‐sight communication and does not require pretethering to the smart‐gadgets, unlike the existing solutions. Thus, enabling the user to walk on pathways, activate pedestrian lights, control public elevators, and perform various outdoor activities independently.

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