Saddle Joints: How It Works and Its Types

KOMPAS.com – Saddle joint It gets its name because the bone that forms one part of the joint is concave at one end and looks like a saddle.

Saddle joints are also known as sellar joints. These highly flexible joints are found in several limbs, including the thumb, shoulder, and inner ear.

Reported from Healthline, the saddle joint has a much wider range of motion, not the simple back and forth motion.

Saddle joints have two basic types of movement known as flexion-extension and abduction-adduction.

Flexion and extension are opposite movements, but they are easy to visualize.

When bending the elbow, the angle between the forearm and forearm is reduced. This is an example of a flexion movement.

Meanwhile, when straightening the arm and extending it, the angle between the upper and lower arms will increase. This is an example of an extension.

Then, abduction and adduction are movements related to the center line of a structure.

For example, spreading your fingers wide will move them from your midline to the center of your hand. The movement back to the midline is adduction.

Some saddle joints are also capable of combining flexion-extension and abduction-adduction movements.

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