Dermatoglyphics (from ancient Greek derma = "skin", glyph = "carving") is the scientific study of fingerprints. The term was coined by Dr. Harold Cummins, the father of American fingerprint analysis., In humans and animals, dermatoglyphs are present on fingers, palms, toes and soles. During the critical period of embryogenesis between 13th week to 21st week, the fingerprints and the human brain develop together, along with the architecture of the other major organ systems. The 10 fingers of the human hand represent the 10 lobes of the brain with a diagonally opposite correlation.