What is the type of movable joint present between the atlas and axis?
1. Pivot
2. Saddle
3. Hinge
4. Gliding
(a) Pivot joint is the joints found between the atlas and axis and between the radius and ulna just below the elbow .This joint allows the movement in only one plane. In a pivot joint, rounded or pointed bonefits into a shallow depression of another bone.
Whereas, saddle joint provides free movement in two planes back-forth and side to side. The projection of one bone fits in saddle-shaped depression of another bone. The joint between the carpel and metacarpel of thumb in the hand is an example of saddle joint.
Hinge joint allows movement primarily in one plane, in a hinge joint reel (spoon) like surface of one bone fits into the concave surface of another bone for example the elbow, the knee, ankle etc.
Gliding joint also known as plane joint, it is a common type of synovial joint formed belween bones that meet at flat or nearly flat articulating surface examples of gliding joint include carpel bones of the wrist and joint between the carpel and metacarpel of the palm.
