Researchers are exploring new approaches to designing prosthetic hands capable of providing “sensory feedback.” Advances toward developing prostheses with a sense of touch are presented in a special topic article in the June issue of Plastic and Reconstructive Surgery®, the official medical journal of the American Society of Plastic Surgeons (ASPS).
Emerging sensory feedback techniques will provide some sensation and enable more natural, intuitive use of hand prostheses, according to the review by ASPS Member Surgeon Paul S. Cederna, MD, of University of Michigan, Ann Arbor, and colleagues. They write, “These breakthroughs pave the way to the development of a prosthetic limb with the ability to feel.”
‘Nerve Interfaces’ May Allow Feeling in Prosthetic Hands
Upper limb loss is a “particularly devastating” form of amputation, since “a person’s hands are their tools for everyday function, expressive communication, and other uniquely human attributes,” according to Dr. Cederna and coauthors. The functional, psychological, economic, and social impact is even greater since most upper limb amputations occur in young, otherwise healthy individuals.
Current robotic prostheses approach the fine dexterity provided by the human hand—but these advances have outpaced developments in providing sensory feedback from artificial limb. “The lack of sensation…is the key limitation to reestablishing the full functionality of the natural limb,” Dr. Cederna and colleagues write.
Providing some sense of touch to the artificial hand would lessen the “cognitive burden” of relying solely on vision to initiate and monitor movements—while also providing “tremendous psychological benefits” for patients. The review focuses on recent and emerging technologies to create “sensory interfaces” with the peripheral nerves to provide feeling to prostheses.
Already in use is a technique called sensory substitution, in which one type of sensation is substituted for another. For example, vibration applied to skin on the remaining limb, or to another part of the body, is used to convey touch from sensors on the prosthesis.
Other techniques use various types of implanted neural interfaces—electrodes placed in or around the nerves—which are stimulated by sensors on the prosthesis. Thesedirect neural stimulation approaches show promise in enabling patients to feel object characteristics such as stiffness, shape, and size, or to control fine-motor movements without visual cues.
A promising newer technique is targeted muscle reinnervation (TMR), in which nerves are transferred to provide sensation to intact muscles and overlying skin. Originally developed to improve control of the prosthesis, TMR approaches are being studied to elicit sensory feedback from the prostheses.
The Latest on: Feedback from Artificial Limbs
via Google News
The Latest on: Feedback from Artificial Limbs
- Unlimited Tomorrow Unveils Its New Direct to Consumer Prosthetic Device with the Launch of TrueLimb™on June 23, 2020 at 5:00 am
Inc., a medical device company manufacturing accessible prosthetic limbs, today announced the launch of TrueLimb, ...
- TPE Compounds Enhance Functionality of Prosthetic Fingerson June 17, 2020 at 5:00 pm
Material selection was crucial in enabling a prosthetic hand device to perform movements and function like natural fingers. Following the trauma of losing a limb or digit ... design is truly amazing ...
- Technology Insight: Future Neuroprosthetic Therapies for Disorders of the Nervous Systemon June 17, 2020 at 5:00 pm
Another requirement for dexterous control of a biological or prosthetic arm and hand is sensory feedback ... in the severed nerve above the amputated limb to stimulate sensory fibers that ...
- Solar-Powered Prosthetic Skinon June 16, 2020 at 5:00 pm
Research is ongoing to find ways to provide feedback from prosthetic limbs, in even a basic format. The human nervous system is a little more complex than just interfacing with the average serial ...
- EMG Tutorial Lets You Listen To Your Muscleson June 15, 2020 at 5:00 pm
What with wearable tech, haptic feedback, implantable devices, and prosthetic limbs, the boundary between man and machine is getting harder and harder to discern. If you’re going to hack in ...
- Membrane-Encased Nanowires May Help Prosthetic Devices Talk to the Bodyon June 10, 2020 at 5:00 pm
but they cannot accurately mimic the motions of actual limbs. For example, current prosthetic devices do not provide feedback to the wearer or adjust to variable loads or complex terrains. To address ...
- The somatosensory cortex receives information about motor outputon June 6, 2020 at 5:00 pm
Thus, S1 receives information about motor output before the arrival of sensory feedback signals ... during voluntary limb movement but not during passive movement correlates with the activity of motor ...
- The Future Of Prostheseson June 3, 2020 at 9:01 pm
Lacking feedback from your limbs as to where they ... holds open the prospect of developing more fully integrated artificial limbs.
- How stretching skin makes prosthetic hand more usefulon May 29, 2020 at 5:00 pm
has worked for years to develop technology that would allow amputees to receive proprioceptive feedback from artificial limbs. The Rice Haptic Rocker uses a rotating arm to brush a soft rubber pad ...
- Step toward artificial hand with a sense of touchon April 27, 2019 at 5:14 pm
WASHINGTON (AP) — Scientists are moving closer to an artificial hand that can ... Beyond better function, getting feedback from the limb "would be a spectacular thing to be able to have, that ...
via Bing News