05-08-2022, 07:15 AM
A blind woman sits in a chair holding a video camera focused on a scientist sitting in front of her. She has a device in her mouth, touching her tongue, and there are wires running from that device to the video camera. The woman has been blind since birth and doesn't really know what a rubber ball looks like, but the scientist is holding one. And when he suddenly rolls it in her direction, she puts out a hand to stop it. The blind woman saw the ball. Well, not exactly through her tongue, but the device in her mouth sent visual input through her tongue in much the same way that seeing individuals receive visual input through the eyes. In both cases, the initial sensory input mechanism -- the tongue or the eyes -- sends the visual data to the brain, where that data is processed and interpreted to form images. Treating back and neck pain with spinal traction is a practice that's been around for many years. As with many medical treatments, this method has evolved with technology, but the rationale and the effects remain the same. The goal of spinal traction is to pull the vertebrae apart from each other. The purpose is generally to create more space for nerves where they exit the spinal column or to relieve pressure on the cartilage disks between the bones or on the small spinal joints themselves. At lower intensities, it can also be used to stretch small spinal muscles. The unproven theory is that if the disks are pulled, they will regain hydration or have an influx of water. This would then make them more shock absorbent. What we do know is how much force of pull is needed to get certain areas of the spine to separate between segments. In the cervical spine (neck) it takes about 20-30 pounds of pull to achieve separation. de
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