Non-axial synovial joints, also known as planar or gliding joints, allow for limited movement between the articulating bones. These joints do not move around a central axis, which distinguishes them from other types of synovial joints that permit higher degrees of freedom of movement.
Examples of non-axial synovial joints include:
- Intercarpal joints: These are found in the wrist between the carpal bones and primarily allow for gliding movements.
- Intertarsal joints: Located in the ankle, these joints facilitate limited sliding movements between the tarsal bones.
- Sternoclavicular joint: At the junction of the sternum and clavicle, this joint provides stability while allowing subtle movements.
In summary, non-axial synovial joints play a crucial role in facilitating smooth movements between bones, primarily allowing gliding motions without rotation or angular movements.