Reviewed by Melinda
Ratini, MS, DO on
April 14, 2021
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National Center for Biotechnology Information: “Growth rate of human fingernails and toenails in healthy American young adults.”
National Institute of Environmental Health Services: “Fun Facts and Trivia.”
American Academy of Orthopaedic Surgeons: “Finger Fractures.”
American Academy of Orthopaedic Surgeons: “Flexor Tendon Injuries.”
University of Arkansas for Medical Sciences: “Do a person’s hair and fingernails continue to grow after death?”
National Science Teachers Association: “Thumbs Are Handy Digits.”
University of Florida: “Male-female ring finger proportions tied to sex hormones in embryo; may offer health insights.”
Beth Israel Deaconess Medical Center: “True or False: Cracking Your Knuckles Can Lead to Arthritis.”
The Royal Society Publishing: “Why are some people left-handed? An evolutionary perspective.”
Daniel Laberge: “Human Grooming.”
Johns Hopkins Arthritis Center: "Knuckle Cracking Q & A."
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