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Imagine interacting with your electronic devices with no touch.  This is what Google's Project Soli promises to generate.  Imagine a sign language translation machine.  A computer that can respond to hand gestures is within striking distance.  Next we do the same with just our minds.

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Spinal Cord Stimulation works by interrupting the normal signalling of pain.  This video gives a good animation of a neurostimulator in action.

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Elliot Krane gives a very good explanation of allodynia.  This is a condition where normal sensory experiences like a soft touch can morph into chronic pain. 

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Paresthesia-Free Pain Relief - Paresthesia is commonly experienced as a tingling sensation that can result from traditional low frequency spinal cord therapies.  10 kHz high-frequency spinal cord stimulation therapy (HF10 therapy) is the first paresthesia-free SCS therapy. In addition to the freedom from persistent tingling or buzzing, HF10 therapy does not cause jolts and shocks related to over-stimulation that traditional SCS patients may experience during positional changes (for example, standing up, sitting down, bending over). This key difference limits sleep disturbances.

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About Spinal Cord Stimulation (SCS) - SCS therapy can help manage chronic pain — even when other therapies have failed.  SCS therapy has helped over 400,000 people over the past 40 years and is safe and effective.  With SCS, a small implanted pulse generator (or IPG) and thin wires (known as leads) are placed into the body. To manage your pain, the leads deliver tiny pulses to the nerves that mask pain signals traveling to the brain.

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Neurostimulation works by the means of a small implanted system that is similar to a pacemaker.  It replaces the chronic pain with a different feeling which is different for each patient.   See the animation below for more information.

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I had a trans photorefractive keratectomy (TransPRK) procedure over two years ago and it successfully corrected my myopia and astigmatism.  It took about 5 days to recover while a new layer of epithelial cells regrew over my cornea.  The software controlling the laser used in my surgery compensated for small movements of my eye in real time to improve the accuracy of the treatment.

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The dorsal root ganglion (DRG) contains primary sensory neurons (PSNs) that form the primary source of information flow from the periphery.  They represent an important processing point of sensory information. Pain is a type of sensory information that flows and is processed by PSNs within the DRG. Normally, pain represents an important protective sensory experience, but in pathological conditions pain becomes a chronic condition.  Neurostimulator systems have been developed to help alleviate these chronic conditions.
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