Finger

Finger

A finger is one of the digits of the hand, and when compared to the toes of the foot, it is a part of the body that is widely used in a variety of ways. It is an organ of manipulation and sensation found in the hands of humans and other primates.

Anatomy

Each finger, except the thumb, has three phalanx bones: proximal, middle, and distal. The thumb only has two phalanx bones. The back of the finger is known as the dorsum.

Bones

The bones in the finger are the phalanges (singular: phalanx). The fingers are also referred to as digits, the same term that describes toes. The first digit is the thumb, followed by index finger, middle finger, ring finger, and little finger or pinky. According to different definitions, the thumb can be called a finger, or not.

Joints

The joints of the fingers include the metacarpophalangeal joint (MCP), the proximal interphalangeal joint (PIP), and the distal interphalangeal joint (DIP).

Functions

Fingers have many functions. They are used for grasping, holding, and manipulating objects. They are also used for sensing.

Diseases and conditions

There are many diseases and conditions that can affect the fingers, including arthritis, Dupuytren's contracture, and trigger finger. Injuries such as fractures and dislocations are common.

See also

• Hand
• Digit
• Thumb
• Toe

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