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Extra resources for Your Bionic Future (Scientific American Presents 04)
Example text
PHANTOM CONTROL In contrast to people with spinal cord injuries, amputees retain uninterrupted nerve connections between the limb stump and their brain. Some people even feel as if their limbs are still there and maintain a sense of control over their missing parts. Such people typically can move muscles or ligaments that would otherwise operate missing fingers. This ability provides a critical link to restoring capacity. Engineers are devising systems that attempt to mimic a natural limb by hooking up muscles and nerves that once controlled some body part to a prosthetic version of it.
Chow. ” genes that encode the two receptors in mice that will then be tempted with a smorgasbord of sweet and bitter treats to help confirm the receptors’ flavorful roles. He says his lab will next begin hunting for receptors that sense salty and sour flavors. Our sense of taste endures lifelong, Ryba says, so high-tech tongue implants aren’t likely in the near future. But at least one research group has engineered a new spin on taste: the electronic tongue. Like the e-nose, the e-tongue takes a cue from human biology, using chemical sensors as artificial taste buds to sample less than appealing — or downright dangerous — fluids, such as blood or urine.
Our sense of taste endures lifelong, Ryba says, so high-tech tongue implants aren’t likely in the near future. But at least one research group has engineered a new spin on taste: the electronic tongue. Like the e-nose, the e-tongue takes a cue from human biology, using chemical sensors as artificial taste buds to sample less than appealing — or downright dangerous — fluids, such as blood or urine. Ever since chemist John T. McDevitt and his colleagues at the University of Texas at Austin created the e-tongue last year, they have been peppered with ideas for using the device as diverse as wine tasting and virus assays.