A finger is a limb of the human body and a type of digit, an organ of manipulation and sensation found in the hands of humans and other primates. Normally humans have five digits, the bones of which are termed phalanges, on each hand , although some people have more or fewer than five due to congenital disorders such as polydactyly or oligodactyly, or accidental or medical amputations. The firstdigit is the thumb , followed by indexfinger, middle finger , ring finger, and littlefinger or pinky . According to different definitions, the thumb can be called a finger, or not.