Saddle joint

Definition

A saddle joint is a type of synovial joint that allows movement in two planes, including flexion, extension, adduction, and abduction. It is characterized by the fitting together of complementary surfaces with concave and convex areas.

Related terms

Synovial Joint: A type of joint that is surrounded by a fluid-filled capsule which allows considerable movement between adjoining bones.

Flexion:

A movement that decreases the angle between two body parts, such as bending an elbow or knee.

Abduction:

A movement away from the midline of the body or from another part; for example, lifting an arm or leg sideways away from the body