Which of the following statements regarding joints is incorrect ?

Options

A. Shoulder joint is a type of ball and socket joint with synovial fluid .
B. Fibrous joints do not permit any movement .
C. Cartilaginous joint allows considerable free movement.
D. Saddle joint is present between the carpal and metacarpal of thumb.

Answer

To determine which statement regarding joints is incorrect, we will analyze each statement one by one.

1. **Shoulder joint is a type of ball-and-socket joint with synovial fluid.**
- The shoulder joint is indeed a ball-and-socket joint, allowing for a wide range of motion in multiple directions. It contains synovial fluid, which lubricates the joint and facilitates movement.
- **Conclusion:** This statement is correct.

2. **A fibrous joint does not permit any movement.**
- Fibrous joints are characterized by their lack of movement. They are connected by dense connective tissue and are typically found in areas such as the skull, where bones are tightly bound together.
- **Conclusion:** This statement is correct.

3. **Cartilaginous joints allow considerable free movement.**
- Cartilaginous joints are connected by cartilage and allow for limited movement. They do not permit considerable free movement; instead, they allow slight movement. Examples include the joints between vertebrae.
- **Conclusion:** This statement is incorrect.

4. **A saddle joint is present between the carpal and metacarpal of the thumb.**
- The saddle joint, which allows for a greater range of motion than a hinge or gliding joint, is indeed found between the carpal bone (trapezium) and the first metacarpal bone of the thumb. This joint allows for movements such as opposition.
- **Conclusion:** This statement is correct.

Based on the analysis, the incorrect statement is: **"Cartilaginous joints allow considerable free movement."**