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341 Chpt 9 joints
Synovial joints
Name | Description | Mvmts possible | Examples |
---|---|---|---|
Planar Joint | Articulating bone surfaces are flat or nearly so | side to side only | intercarpal or intertarsal joints |
Hinge joint | 1st bone has a convex surface, 2nd a concave one | Flexion, Extension, and Hyperextension | Knee, elbow, ankle |
Ankle | Movements unique to ankle | Inversion, and eversion | Leads to sprains |
Pivot Joint | Rounded surface of 1st bone articulates w/ ring of bone or cartilage on 2nd bone | allows rotation around long axis | Atlas-axis joint, Proximal radioulnar joint |
Condyloid Joint | Oval shaped projection fits into an oval shaped depression | Flexion, extension, abduction, and adduction | wrist and metacarpophalangeal joints |
Saddle Joint | 1st bone is saddle shaped, 2nd bone resembles a rider sitting on the saddle | circumduction and opposition | trapezium and metacarpal 1 |
Ball and socket Joint | Ball shaped 1st bone fits into cup shaped 2nd bone | flex/ext, ad/abduction, circumduction, rotation | shoulders, hips |