An STT joint, also known as the triscaphoid joint, is a crucial connection within the wrist. It is formed by the articulation of three carpal bones.
Understanding the STT Joint
Here's a breakdown of what makes the STT joint important:
- Location: It's situated in the wrist, linking the proximal and distal rows of carpal bones.
- Bones Involved: The joint consists of three bones:
- Scaphoid: One of the proximal carpal bones.
- Trapezium: One of the distal carpal bones.
- Trapezoid: Another distal carpal bone.
Function of the STT Joint
The STT joint is vital for several reasons:
- Stability: It provides a strong and stable link between the two rows of wrist bones, enhancing the overall integrity of the wrist.
- Force Transmission: The joint effectively transmits force from the thumb across the wrist. This is important for gripping, grasping, and other hand functions.
- Movement: While not a primary movement joint, it contributes to the overall range of motion of the wrist, ensuring smooth hand movement.
Why is it Important?
The STT joint plays a fundamental role in overall hand and wrist function, enabling us to perform a wide array of daily tasks. It's essential to ensure its health and stability. Injuries to this area can impact wrist function severely.
| Feature | Description |
|---|---|
| Name | STT Joint (Triscaphoid Joint) |
| Location | Wrist, connecting proximal and distal carpal rows |
| Bones Involved | Scaphoid, Trapezium, Trapezoid |
| Function | Provides stability, transmits force, and supports wrist movement |
