Knuckles
Knuckles
Knuckles (/ˈnʌkəlz/), also known as metacarpophalangeal joints (MCP), are the joints in the human hand that connect the fingers to the hand. They are a type of synovial joint, which allows for movement and flexibility.
Etymology
The term "knuckle" is derived from the Middle English word "knokel", which means the top of something rounded or a small, rounded hill. The term was first used in the 14th century.
Anatomy
Knuckles consist of the metacarpal bones of the hand and the proximal phalanges of the fingers. These bones are connected by ligaments, tendons, and muscles, which allow for movement and flexibility. The knuckles are covered by skin and are often visible when the hand is clenched, such as when making a fist.
Related Terms
- Finger: The long, thin part of the hand that extends from the knuckles.
- Hand: The part of the human body that includes the fingers, palm, and wrist.
- Joint: The point at which two or more bones meet in the body.
- Metacarpal bones: The five long bones in the hand that connect the wrist to the knuckles.
- Proximal phalanges: The bones in the fingers and toes that are closest to the hand or foot.
- Synovial joint: A type of joint that is surrounded by a thick, fluid-filled capsule, allowing for movement and flexibility.
See Also
External links
- Medical encyclopedia article on Knuckles
- Wikipedia's article - Knuckles
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