What Happens When Your Body Becomes a Sensory Deprivation Chamber?

When Renita Adams puts a pot on the stove in her Virginia home, she also puts a rubber band around her wrist. The 62-year-old retiree prefers a tight band that squeezes a little bit, so she won't forget it's there-usually one of the colorful, stretchy rings that come wrapped around produce bundles. Her years as a...