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When our peripheral nerves fire anywhere in our body’s extremity… they are usually trying to tell our brain something rather important: “Hey, that stove top is a little too hot for your finger tips… pull away!” or, “I think that’s kind of sharp… it might be a nail… it is! it is a nail!… step away!”
While this extended network of vital warning zaps to our brain are not enjoyable as we sense them as intense pain, the function is critical to our survival and helps keep us from doing stupid things and warn us about problems that our visual perception might be missing. However, what if these warning zaps misfire? And, what if they keep misfiring constantly? They might be trying to tell us that something is wrong… possibly internally… and sure this might be useful, but what if you can’t do anything to fix the problem and they just keep on zapping?
This ongoing misfiring of localized sections in the peripheral nervous system is so much more than an annoyance, and is a serious and painful disorder for millions of humans. [ Read more about Peripheral Nerve Disorders ] One major problem in particular is peripheral neuropathy, where actual damage has occurred to the peripheral nerves. Although damage to these nerves certainly would be problematic — maybe you don’t notice that sharp nail pressing into your heel as quickly as you once did — but, the chronic problem is the damaged nerves seem to incessantly scream at the brain like a teenager who just learned she can’t stay out past midnight with her friends.
Wouldn’t it be nice to just tell those nerves to shut up and go to bed?
This is an important example of chronic pain that so many people suffer continuously through their day-to-day activities. Drugs have been used to combat the screaming nerves, but mostly measure up to over-the-counter pain medications. To date, there has been no systematic treatment developed, although there are several dedicated research centers located throughout the United States working on the problem.
Now, there is very early stage research on a new technological approach to quieting the broken nerves. A Dallas, TX-based startup called MicroTransponder is applying a very popular technology for powering and controlling electrical devices wirelessly. This technique, called “RFID” (radio-frequency identification), is a device that detects a remote radio signal to activate its internal circuitry to perform some function. The technology is already embedded in our culture, from automated highway toll collection (EZPass) to product tracking in inventory systems and even to checking in your library book.
For this application of remote neural stimulation, the idea is to inject tiny RFID devices to float around the damaged fingers or toes. When the nerve start to scream, an external signal generator will send out a radio-frequency message to the internal devices which will then power up and provide a polite zap back to the nerve endings. The anticipation is that applying just the right pattern of miniature jolts will quiet the screaming teenager and provide some relief to the 20 million Americans suffering today.
“Tiny Implants for Treating Chronic Pain” :: Technology Review :: May 15, 2009 :: [ READ ]
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