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Carpus (Carpal Bones)

The group of bones that make up the wrist.

PubMed Health Glossary
(Source: Wiktionary)

About the Hand

The human hand has a complex structure made up of a total of 27 individual bones: 8 carpal bones, 5 metacarpal bones and 14 finger bones (also called phalanges) connected by joints and ligaments. About one fourth of all our body's bones are found in our hands. Institute for Quality and Efficiency in Health Care

The carpal bones (from left to right in the image)

Distal row: row near the fingers

  • Hamate
  • Capitate
  • Trapezoid
  • Trapezium

Proximal row: row near the wrist

  • Pisiform
  • Triquetrum
  • Lunate
  • Scaphoid

Terms to know

Capitate Bone
The largest of eight carpal bones, located in the center of the hand.
Carpometacarpal Joint
The synovial joints between the carpal and metacarpal bones in the hand.
Distal
In medicine, refers to a part of the body that is farther away from the center of the body than another part. For example, the fingers are distal to the shoulder. The opposite is proximal.
Finger and Toe Joints (Interphalangeal Joint)
Hinge joints between the phalanges of the hand or foot.
Fingers
A finger is a limb of the human body and a type of digit, an organ of manipulation and sensation.
Hamate Bone
The hamate is an irregularly-shaped carpal bone found within the hand.
Hand
The part of the fore limb below the forearm or wrist.
Lunate Bone
The lunate is a crescent-shaped carpal bone found within the hand.
Metacarpal Bones
Any of the five bones between the wrist and the fingers that form the skeleton of the palm.
Metacarpophalangeal Joint
The metacarpophalangeal joints (MCP) refer to the joints between the metacarpal bones and the phalanges of the fingers.
Metacarpus
The region of the hand between the wrist and the fingers.
Palm
The central region of the front of the hand.
Phalanges
The phalanges are bones in the toes and fingers. The thumbs and big toes have two phalanges while the other digits have three phalanges.
Pisiform Bone
The pisiform bone is a small knobbly, pea-shaped bone that is found in the wrist. Unlike the other carpal bones, the pisiform is not involved in movement of the wrist.
Proximal
In medicine, refers to a part of the body that is closer to the center of the body than another part. For example, the knee is proximal to the toes. The opposite is distal.
Radius
The smaller of the two bones of the forearm. It is located on the thumb side of the arm.
Scaphoid Bone
The scaphoid bone is one of the carpal bones of the wrist. It is situated between the hand and forearm on the thumb side of the wrist (also called the lateral or radial side). It forms the radial border of the carpal tunnel. It is approximately the size and shape of a medium cashew.
Thumb
The short thick digit of the hand that for humans has the most mobility and can be made to oppose (moved to touch) all of the other fingers.
Trapezium Bone
The trapezium bone is a carpal bone in the wrist. It forms the radial border of the carpal tunnel.
Trapezoid Bone
The trapezoid is a four-sided carpal bone found within the hand.
Triquetrum Bone
The triquetral is one of the eight carpal bones of the hand. It is a three-sided bone.
Ulna
The bone of the forearm that extends from the elbow to the wrist on the side opposite to the thumb.
Wrist
The complex joint between forearm bones, carpus, and metacarpals where the hand is attached to the arm.

Terms to know

Capitate Bone
The largest of eight carpal bones, located in the center of the hand....
Carpometacarpal Joint
The synovial joints between the carpal and metacarpal bones in the hand....
Distal
In medicine, refers to a part of the body that is farther away from the center of the body than another part....
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