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Take a needle and close your eyes. Rotate the needle so you don't know which is the blunt side and which is the sharp. Now lightly prick yourself on the foot and see if you can tell which side is which. If you can't, it means you may have lost some of the fast sensory fibers, the slow fibers, or both. This deficiency means that you need to get yourself to the doctor to determine the underlying cause, and prevent further loss of pain sensation.
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YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger
Between your full-length mirror and high-school biology class, you probably think you know a lot about the human body. While it's true that we live in an age when we're as obsessed with our bodies as...
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.