Robotic Glove Custom Made for Stroke Survivors

The developers claim this robotic glove is the first to “feel” the difference between correct and incorrect versions of the same song and to combine these features into a single hand exoskeleton. “Playing the piano requires complex and highly skilled movements, and relearning tasks involves the restoration and retraining of specific movements or skills,” said Erik Engeberg, who is a professor at Florida Atlantic University College of Engineering and Computer Science. “Our robotic glove is composed of soft, flexible materials and sensors that provide gentle support and assistance to individuals to relearn and regain their motor abilities.”

Stroke is the most important cause of disability for adults age 50 and older. After a stroke, patients commonly need rehabilitation to relearn to walk, talk, or perform daily tasks. Research has shown that besides physical and occupational therapy, music therapy can help stroke patients to recover language and motor function. But for adults trained in music and who suffered a stroke, playing music may itself be a skill that needs to be relearned.

In a study published in the journal Frontiers in Robotics and AI, the Florida researchers have shown how novel soft robotics can help recovering patients to relearn playing music and other skills that require dexterity and coordination. While wearing the glove, human users have control over the movement of each finger to a significant extent. Engeberg said the glove is designed to assist and enhance natural hand movements, allowing a stroke survivor to control the flexion and extension of their fingers.

The glove supplies hand guidance, providing support and amplifying dexterity. Each fingertip contains an array of 16 flexible sensors or ‘taxels’, which give tactile sensations to the wearer’s hand upon interaction with objects or surfaces. "The robotic glove is certainly an important advance in stroke rehabilitation. Not only can the glove be used by stroke victims, but it could be used broadly by people with spinal cord injuries, brachial plexus injuries, basically anyone who has impaired motor control or sensation of the hand. Furthermore, this kind of glove could even be used as a tool to prevent certain kinds of injuries caused by repetitive movements," said Engeberg.

However, he cautioned that this technology is still in early stages. Currently, the robotic glove is a significant development but there are also other interesting technologies on the horizon that could further transform stroke rehab. "For instance, virtual reality-based therapies are gaining attention and have shown promise in providing immersive and engaging rehabilitation experiences. Additionally, brain-computer interface technologies hold potential for enabling direct communication between the brain and external devices, opening up new avenues for rehabilitation," said Engeberg.

How Can I Get This Glove?

As for availability, the timeline for the robotic glove's widespread use could vary. While the technology is progressing rapidly, it may still take some time before it becomes readily accessible to the general public. "However, there might be ongoing clinical trials that individuals can participate in to gain access to the technology and contribute to its further development. Consulting with health careprofessionals or research institutions specializing in stroke rehabilitation would provide more specific information about the current status and availability of such trials," said Engeberg.

The researchers used machine learning to successfully teach the glove to ‘feel’ the difference between playing a correct versus incorrect version of a beginner’s song on the piano. The glove operated autonomously without human input, with pre-programmed movements. The song was ‘Mary had a little lamb’, which requires four fingers to play. “We found that the glove can learn to distinguish between correct and incorrect piano play. This means it could be a valuable tool for personalized rehabilitation of people who wish to relearn to play music,” said Engeberg.

The authors foresee that patients might ultimately wear a pair of these gloves, to help both hands independently to regain dexterity, motor skills, and a sense of coordination.  “The technology developed by professor Engeberg and the research team is truly a game-changer for individuals with neuromuscular disorders and reduced limb functionality,” said Stella Batalama, who is the dean of the FAU College of Engineering and Computer Science. “Although other soft robotic actuators have been used to play the piano, our robotic glove is the only one that has demonstrated the capability to ‘feel’ the difference between correct and incorrect versions of the same song.”

John Schieszer is an award-winning national journalist and radio and podcast broadcaster of The Medical Minute. He can be reached at medicalminutes@gmail.com.