Synovial Joints Flashcards
Describe the synovial joint
Cavities between bones are filled with synovial fluid. This fluid helps lubricate and protect the bones.
What are the synovial joint classifications
Gliding, hinge, pivot, ellipsoid, saddle, and ball-and-socket
What does gliding (plane) do
It is a nonaxial movement (slipping or gliding movements only). This occurs in the intercarpal, intertarsal joints & sacroiliac joints.
What does the hinge (ginglymus) joint do
It is a uniaxial movement. A hinge joint permits only flexion and extension. The elbow, knee, phalanges and ankle are examples of this type of joint.
What does the pivot (trochoid) joint do
It is a uniaxial movement. These joints allow only rotation around a single axis. Atlas/axis joint and Proximal and distal radio ulnar joint are an example of the pivot (trochoid) joint.
What does the ellipsoid (condyloid) do
It is a biaxial movement at right angles to each other. Examples include the metacarpophalangeal joints (knuckles) and the Atlanto-Occipital joint.
What does the saddle (sellar) joint do
It is a biaxial movement. The carpometacarpal joint between the trapezium and the first metacarpal (thumb) and sternoclavicular joint.
What does the ball and socket joint do
It is multiaxial movement. This joint In a ball-and-socket joint, the round head of one bone rests within the cup-shaped depression of the another bone. The hip and the shoulder joints are examples of this type of bond.
