Health & Fitness Find out how the shape of your fingernails is related to your personality. Posted on December 6, 2017 by Hollie 11. Anatomy The nails are produced near the cuticle of nails and are made up of keratin. They are known as nail plates. 12. SHORTER INDEX FINGER A risk of ADHD, autism and agressiveness is seen in people with short index finger. Pages: 1 2 3 4