Types of Synovial Joints
Let's explore the fascinating world of synovial joints - the most common and movable joints in our body! There are six main types, each designed perfectly for specific movements and functions.
1. Ball and Socket Joint
- Most mobile of all synovial joints
- Consists of a rounded head of one bone fitting into a cup-like socket of another
- Allows movement in multiple planes (multi-axial)
Found in:
- Hip joint (femur and acetabulum)
- Shoulder joint (humerus and glenoid cavity)
2. Hinge Joint
- Works like a door hinge
- Allows movement in one plane only (uniaxial)
- One bone has a cylindrical projection that fits into a trough-like depression of another bone
Found in:
- Elbow (humerus and ulna)
- Knee (femur and tibia)
- Finger joints
3. Pivot Joint
- One bone rotates around another
- Allows rotational movement only
- Cylindrical surface of one bone articulates with a ring formed by another bone
Found in:
- Atlas and axis vertebrae (allows head rotation)
- Radioulnar joint (allows forearm rotation)
