Hand
Hand
The Hand (/hænd/; from Old English hand, hond) is a prehensile, multi-fingered appendage located at the end of the forearm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs.
Anatomy
A typical hand consists of a broad palm (metacarpus) attached to the arm by a wrist (carpus), and five digits, separated into two groups: four fingers (digits) on one side and a single thumb (thumb) on the other side, which is opposable to the fingers. The fingers are also known as phalanges (phalanges).
Function
The hand has both sensory and motor functions. It can detect and interpret information about the environment through touch (somatosensation), and it can manipulate and interact with objects in many ways. The hand's ability to grip and manipulate objects is a key factor in humans' ability to use tools (tool use).
Related Terms
- Finger: One of the five digits of the hand, typically used for grasping and manipulation.
- Thumb: The first digit of the hand, set apart and opposable to the other four fingers.
- Palm: The central part of the hand, typically broad and flat.
- Wrist: The complex joint connecting the hand with the forearm.
- Metacarpus: The intermediate part of the hand skeleton that is located between the fingers and the wrist.
- Carpus: The eight small bones that make up the wrist, which connects the hand to the forearm.
- Phalanges: The bones that make up the fingers of the hand and the toes of the foot.
External links
- Medical encyclopedia article on Hand
- Wikipedia's article - Hand
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