An Explanation for Why Knees Jerk When Struck With a Doctor’s Reflex Hammer and Various Other Tendon Tricks

At-Bristol (previously) hosts Beth Cotterell and Heather Nichol explain why patients kick when their knees are whacked with those little rubber reflex hammers. The pair also show viewers how to test their tendons from the comfort of their own home.

submitted via Laughing Squid Tips