Pivot—Rotation around longitudinal axis (uniaxial)
Condyloid (KON-di-loyd) —Rotation around two axes
(biaxial)
Saddle—Rotation around two axes (biaxial)
Ball-and-socket—Rotation around three axes (triaxial)
Figure 5.15
shows examples and types of permissible
movement for each type of synovial joint.
Ulna -
Radius ■
Scaphoid
Biaxial
Lunate
Biaxial
Ulna ■
Radius ■
Trapezium
Metacarpal
of thumb
d. Condyloid joint between radius and scaphoid
and lunate bones of carpus (wrist)
e.
Saddle joint between
trapezium
of carpus (wrist)
and metacarpal of thumb
f. Ball-and-socket joint between head of
femur and acetabulum of hip bone
Articulations Form Where Bones Join Together 141
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