The carpal bones are a group of eight small bones located in the wrist that, along with the distal ends of the radius and ulna, form the wrist joint. These bones are also known as wrist bones.
Understanding Carpal Bones
Here’s a more detailed look at carpal bones:
- Location: They reside in the wrist, connecting the hand to the forearm.
- Number: There are typically eight carpal bones in each wrist.
- Function: They contribute to wrist flexibility and allow for a wide range of hand movements.
- Arrangement: The carpal bones are arranged in two rows:
- Proximal row: This row is closest to the forearm and includes the scaphoid, lunate, triquetrum, and pisiform bones.
- Distal row: This row is closer to the hand and includes the trapezium, trapezoid, capitate, and hamate bones.
Key Features
| Feature | Description |
|---|---|
| Shape | Short, irregular bones |
| Location | Wrist, between forearm and hand |
| Number | 8 in each wrist |
| Function | Form the wrist joint, allow for hand movement |
| Organization | Arranged in two rows: proximal and distal |
Importance of Carpal Bones
- Movement: They enable diverse hand movements, including flexion, extension, abduction, and adduction.
- Stability: They provide stability and structural support to the wrist.
- Force Transmission: They transmit force from the hand to the forearm.
The carpal bones, therefore, play a crucial role in the functionality and mobility of the hand and wrist. They are small yet vital for everyday activities.
