prosthesis
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Winter the dolphin gets fitted with prosthetic tail
It's been a while since we last heard about a dolphin getting fitted with an artificial tail, but it looks like Fuji finally has some new bionic company, with Winter the dolphin now starting to get used to a prosthetic tail of its own. Unlike Fuji, Winter lost her both her tail flukes and her peduncle, which posed additional problems for the team of researchers that developed the tail, ultimately requiring them to "MacGyver" one as they went along (a term the researchers themselves used to describe it). While it's apparently not perfected just yet, Winter has started to learn to swim with a prosthetic sleeve, which will eventually be outfitted with artificial tail flukes that could allow it to keep pace with other dolphins. In addition to helping Winter, the researchers behind the tail say that the lessons learned from it could also help human amputees, with the gel sleeve used to hold the tail into place apparently already adapted for use with a human prosthesis.[Photo courtesy of AP]
Touch Bionics i-LIMB bionic hand
Touch Bionics, a UK-based prothesis developer, announced today that its i-LIMB bionic hand has been made available for use in the United States and Europe. The i-LIMB is one the first widely available prosthetic hands with five individually powered digits, affording its user a surprisingly wide range of motion. Additionally, the i-LIMB uses dynamic touch detection which can sense when a finger has sufficient grip on on object and stop powering, useful in situations such as holding someone's hand, where too much power can cause, er, problems. Using electric signals generated by working muscles to control the hand, the device is much like traditional myoelectric prosthetics (the signals are sent from electrodes placed on the skin). Touch Bionics has also developed a "groundbreaking" form of cosmesis, a latex sheath which covers the hand that TB claims gives an incredibly realistic appearance. Check the gallery to see for yourself.[Thanks, Matt]%Gallery-4959%
Software system to enable visual prosthesis learning
Years back, scientists at the University of Bonn reckoned a visual implant would cure blindness, but unfortunately, the results were less than positive. While many alternatives have surfaced in the meantime, gurus at the institution are hitting back yet again with another option of their own, as the researchers introduced a software system that enables visual prosthesis to "learn" how to interpret sights in a way that the brain can understand -- something the original implementation had difficultly accomplishing. Essentially, an artificial retina "must learn to generate signals that are useful for the brain," and while the group's software should assist users with "flexible" central visual systems to garner new abilities in sight, they warn against "expecting miracles" too soon.[Via MedGadget]
