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How do current bionic hands work?
How do current bionic hands work?
Current bionic hands rely on motors to power digits. The most basic systems use a system of cables attached to a harness that the user wears, which is controlled by the motion of residual limbs. However, actual bionics use a digital control method to control the movement of the hand. These can range from basic control methods, such as a control unit in the user's shoe, to complex methods like myoelectric control. Myoelectric control is the most widely used method of bionic hand control, and it works by interpreting electrical activity in the neuromuscular limb stump, thus triggering motion. Some less commonly used controls include bipolar differential electromyographic electrodes and sonomyography.
Pros and Cons of Bionic Hand Designs
Pros and Cons of Bionic Hand Designs
Pros
Pros
Bionic hands allow amputees to have an improved quality of life with significantly improved function. With bionics, they are able to achieve a range of functional grips, including key, power, precision, index point and thumb park.
With certain prosthetics they can also blend in fairly functionally, and certain prosthetics can be indistinguishable from their former limbs.
Cons
Cons
While useful, existing bionic technology has its limitations. It is still in many ways inferior to real hands, and they cannot replicate complex, intrinsic functions. To use a bionic hand, it requires extensive training and occupational therapy to ensure its successful function. In addition, they can be noisy, costly, and it is difficult to bear weight on a prosthetic hand.
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