They’re also plumbed by blood vessels, which lead all the way from the heart. By the time blood vessels reach these extremities, like twigs from a tree, they have branched and got much smaller in size. This rare condition is sometimes called “trash foot,” because of the way in which the feet become so discolored. In adults, however, finding the Babinski sign is an altogether different story. In some otherwise healthy people though, the Babinski sign can be observed during deep sleep.

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Persons: They’re, it’s, you’ve, “, —, Joseph Babinski, Dan Baumgardt Organizations: CNN, of Physiology, University of Bristol Locations: United Kingdom