Question

Which of the following is an example of gliding joint?

• A. ( \text{Knee joint} ) \
• B. ( \text{Between the carpals} ) \
• C. ( \text{Between carpal and metacarpal of thumb} ) \
• D. ( \text{Between atlas and axis} ) \

Hint:

Gliding joints allow for subtle, flat movements, often found in areas requiring flexibility but not extensive range of motion. Think of the small bones that need to move past each other to allow for overall complex motion, like in the wrist (carpals) and ankle (tarsals), or between vertebrae (facet joints).

Answer 1

The Correct Option is B

Gliding joints, also known as plane joints, are a type of synovial joint characterized by flat or nearly flat articulating surfaces that allow for limited sliding or gliding movements in various directions, but without significant angular or rotational motion. Let's analyze the given options:

• (A) Knee joint: The knee joint is primarily a hinge joint, allowing for flexion and extension.
• (B) Between the carpals: The joints between the individual carpal bones in the wrist are classic examples of gliding (plane) joints. They allow the carpal bones to slide past one another, contributing to the overall flexibility of the wrist.
• (C) Between carpal and metacarpal of thumb: This is a saddle joint, which allows for a wide range of movements, including flexion, extension, abduction, adduction, and circumduction.
• (D) Between atlas and axis: The atlanto-axial joint is a pivot joint, allowing for the rotation of the head.

Therefore, the joints between the carpals are examples of gliding joints.