Upper limb prostheses: bridging the sensory gap

As detailed in The Journal of Hand Surgery, addressing the restoration of sensory feedback in prosthetic hands lacks a one-size-fits-all solution. Individuals grappling with limb loss not only undergo the emotional process of adapting to a permanently changed life but also contend with the reality that current prosthetic solutions often fall short of their expectations. Progress in signal processing and implantable systems within the field of engineering has yielded advancements.
The ideal sensory feedback envisions mechanized receptors on the prosthetic limb's surface, capable of converting external stimuli into electrical signals. Sensory feedback methods can be broadly categorized based on invasiveness, as extradermal and subdermal approaches. Despite strides in developing effective motor control techniques, prosthetic movements still lag behind the natural functionality of a normal human hand. Recent clinical trials have explored implanted electrode systems, showing promise in providing users with some sensory feedback from the prosthetic limb, ultimately enhancing control. However, it's crucial to note that these trials remain in the research phase and have not yet transitioned into mainstream clinical practice.