Carpal Bones Overview

Study Notes

Carpal Bones Overview

The human wrist contains eight carpal bones, crucial for wrist flexibility and movement.

Proximal Row of Carpal Bones

Scaphoid:
- Boat-shaped, largest bone in the proximal row.
- Articulates with the radius, helping in wrist stability.
Lunate:
- Moon-shaped, second carpal bone.
- Also articulates with the radius, contributing to wrist joint formation.
Triquetrum:
- Possesses three articular surfaces and has a pyramidal shape.
- Connects with the pisiform bone on its proximal side.
Pisiform:
- Pea-shaped and the smallest carpal bone.
- Located proximal to the triqutrum, aiding finger movement.

Distal Row of Carpal Bones

Trapezium:
- Four-sided, irregularly shaped bone located distally.
- Plays a key role in forming the base of the thumb.
Trapezoid:
- Also a four-sided bone but the smallest in the distal row.
- Functions in connecting the hand and wrist.
Capitate:
- Largest of all carpal bones.
- Fits into a concavity created by the scaphoid and lunate bones, playing a critical role in wrist articulation.
Hamate:
- Last bone in the distal row, characterized by a hook-like process.
- Provides support for the structure of the hand and attachment points for ligaments.

Description

This quiz explores the eight carpal bones of the human wrist, highlighting their shapes, functions, and relationships within the wrist structure. You'll learn about both the proximal and distal rows of carpal bones and how they contribute to wrist flexibility and stability.