Tech

Brain machine interface helped a man with polio feed himself with a robotic arm


People with arm paralysis can easily feed themselves in the future. Researchers led by Johns Hopkins University have develop a new technique allows a partially paralyzed man to feed himself using robotic arms connected via brain-machine interface. He only has to make small movements with his fist at certain prompts (such as “choose a cutting position”) to get his arm equipped with a fork and knife to cut food and bring it to his mouth. He can eat dessert within 90 seconds, according to researchers.

The new approach focuses on a shared control system that reduces the amount of input required to complete a task. He can map his four degrees of freedom of movement (two for each hand) to 12 degrees of freedom to control the robotic arms. The intelligent responses based on the quickness of the limbs also reduce the workload.

Technology is still nascent. The scientists wanted to add touch-like sensory feedback instead of relying solely on images. They also hope to improve accuracy and efficiency while reducing the need for visual validation. However, in the long term, the team finds that robotic arms like these can recover complex movements and bring more independence to people with disabilities.

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