Movement of a joint in one plane is described as what?

Movement of a joint in one plane is described as what?

• A. Uniaxial
• B. Multiaxial
• C. Triaxial
• D. Polyaxial

Answer: (A)

Uniaxial movement means a joint rotates around a single axis, allowing motion in only one plane. This is typical of hinge joints, like the elbow, which mainly bend and straighten in the sagittal plane around a single horizontal axis. Joints that move in multiple planes around multiple axes are described as multiaxial or polyaxial, such as ball-and-socket joints that allow movement in several directions.

Uniaxial movement means a joint rotates around a single axis, allowing motion in only one plane. This is typical of hinge joints, like the elbow, which mainly bend and straighten in the sagittal plane around a single horizontal axis. Joints that move in multiple planes around multiple axes are described as multiaxial or polyaxial, such as ball-and-socket joints that allow movement in several directions.