Illustrations of joint shapes

1. Wheel angle joint
   = Swivel hinge joint
   (e.g. knee joint)
2. Saddle joint
   (e.g. thumb saddle joint)
3. Ball joint
   (e.g. shoulder joint,
   Hip joint)
4. Hinge joint
   (e.g. elbow joint)
5. Wheel joint
   = Pivot joint
   (e.g. spoke-ulnar joints)
6. Egg joint (not shown)
   similar to ball joint,
   only biaxial
   (e.g. proximal wrist)
   
   Uniaxial Joints -
   Hinge joint and wheel joint
   Biaxial joints -
   Wheel angle joint, saddle joint
   and egg joint
   Triaxial joint - Ball joint

You can find an overview of all Dr-Gumpert images at: medical illustrations

Related images

Illustration
Saddle thumb joint

Illustration
Elbow

Illustration
Finger joint

Illustration
Ankle

Illustration
wrist

Illustration
hip joint

Illustration
Knee joint

Illustration
Bone overview

Illustration
Upper ankle

Illustration
Shoulder joint

Illustration
Lower ankle