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Chapter 6: Part 2
Anatomy
Diarthrosis | Description |
---|---|
hinge | spool-shaped surface fits into concave surface (e.g. elbow, knee, ankle) |
pivot | arch-shaped surface rotates about rounded or peglike pivot (e.g. between axis and atlas) |
ball and socket | ball-shaped head fits into concave socket (e.g. shoulder joint, hip joint) |
condyloid | oval-shaped condyle; fits into elliptical cavity (e.g. wrist joint between the radius and carpals) |
saddle | saddle-shaped bone fits into socket that is curved in opposite direction (e.g. thumb, between first metacarpal and carpal) |
gliding | articulating surfaces; usually flat (e.g. between carpal bones; between sacrum and ilium) |