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Synovial Joints
(a) Plane joint
Ulna
Vertical axis
Trough
Cylinder
Axle (rounded
bone)
Sleeve
(bone and
ligament)
Flat
articular
surfaces
Medial/lateral
axis
Rotation
Flexion and extension
Gliding
Radius
Humerus
Metacarpals
Examples:
Intercarpal joints, intertarsal joints, joints between vertebral articular surfaces
Examples:
Elbow joints, interphalangeal joints
Carpals
Ulna
Nonaxial movement
(b) Hinge joint
Uniaxial movement
Examples:
Proximal radioulnar joints, atlantoaxial joint
(c) Pivot joint
Uniaxial movement
Figure 8.7
The shapes of the joint surfaces define the types of
movements that can occur at a synovial joint; they also determine
the classification of synovial joints into six structural types.
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