Pivot Joint

Pivot joint: A rounded portion of a bone is enclosed within a ring formed partially by the articulation with another bone and partially by a ligament . The bone rotates within this ring. Since the rotation is around a single axis, pivot joints are functionally classified as a uniaxial diarthrosis type of joint.
An example of a pivot joint is the atlantoaxial joint, found between the C1 (atlas) and C2 (axis) vertebrae. Here, the upward projecting dens of the axis articulates with the inner aspect of the atlas, where it is held in place by a ligament. Rotation at this joint allows you to turn your head from side to side. Hinge joint: The convex end of one bone articulates with the concave end of the adjoining bone.
This type of joint allows only for bending and
Other hinge joints examples include the knee and ankle. Condyloid joint (Ellipsoid joint) is the shallow depression at the end of one bone articulates with a rounded structure from an adjacent bone or bones.
An example of the Condyloid joint is the knuckle joints of the hand between the distal end of a metacarpal bone and the proximal phalanx bone.
Plane joint is the articulating surfaces of the bones which are flat or slightly curved and of approximately the same size, which allows the bones to slide against each other. The motion at this type of joint is usually small and tightly constrained by surrounding ligaments. Based only on their shape, plane joints can allow multiple movements, including rotation, However, not all of these movements are available to every plane joint due to limitations placed on it by ligaments or neighboring bones.
Plane joints are found between the carpal bones of the wrist or tarsal bones of the foot, between the clavicle and acromion of the scapula, and between the superior and inferior articular processes of
adjacent