the Sterno-Clavicular Joint is also known as

Correct option is C

The Sterno-Clavicular (SC) Joint is often classified as a gliding joint (also referred to as a plane joint), although it has some additional movement capabilities beyond typical gliding joints. In a gliding joint, the articulating surfaces of the bones are nearly flat, allowing limited movement in multiple directions. The SC joint allows for small sliding or gliding movements in several directions, including elevation, depression, and slight rotation, although the main function is stability and allowing for upper limb movement.
The other options are incorrect for the Sterno-Clavicular joint:
Hinge Joint (a): A hinge joint, like the elbow or knee, allows for movement primarily in one plane (flexion and extension). The SC joint allows for more diverse motion than a hinge joint.
Condyloid Joint (b): While the SC joint does allow for some angular movement, it is more accurately described as a gliding joint, not a condyloid joint. Condyloid joints allow for movement in two planes (flexion/extension, abduction/adduction), which is not the primary function of the SC joint.
Pivot Joint (d): A pivot joint allows for rotational movement, such as the joint between the first and second cervical vertebrae (atlas and axis). The SC joint does not function primarily in rotation.
Information Booster:
The Sterno-Clavicular Joint allows for slight movements that help with the mobility of the shoulder and upper limb.
The joint functions in gliding motion, primarily helping in the elevation and depression of the clavicle.
The SC joint is critical for the connection between the upper limb and the axial skeleton.
Gliding joints like the SC joint are found where two flat or slightly curved surfaces come together, allowing limited motion.