index finger, pointer finger, forefinger, or 2nd digit.Each finger, starting with the one closest to the thumb, has a colloquial name to distinguish it from the others: The four fingers can be folded over the palm which allows the grasping of objects. There are five digits attached to the hand, notably with a nail fixed to the end in place of the normal claw. It is the area that sustains most pressure when using the palm of the hand for support, such as in handstand. The heel of the hand is the area anteriorly to the bases of the metacarpal bones, located in the proximal part of the palm.The opisthenar area (dorsal) is the corresponding area on the posterior part of the hand.The skin in this area contains dermal papillae to increase friction, such as are also present on the fingers and used for fingerprints.
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