Movable joints, also known as freely movable joints, are joints that primarily facilitate movement within a structure or organ. These joints are essential for a wide range of physical activities.
Types of Freely Movable Joints
There are several types of freely movable joints in the human body, each designed for specific kinds of motion. According to the reference, four types are:
- Ball and Socket Joint: Allows for movement in multiple axes (e.g., shoulder, hip).
- Pivot Joint: Allows for rotational movement (e.g., neck).
- Hinge Joint: Allows for movement in one plane (e.g., elbow, knee).
- Gliding Joint: Allows for sliding or gliding movements (e.g., wrist, ankle).
Function and Importance
Movable joints are critical for:
- Locomotion: Enabling walking, running, and other forms of movement.
- Manipulation: Allowing precise movements of the hands and fingers.
- Flexibility: Providing the body with a wide range of motion.
- Support: Helping to distribute weight and maintain posture.
Examples in the Human Body
| Joint Type | Location | Movement Allowed |
|---|---|---|
| Ball and Socket | Shoulder, Hip | Rotation, Flexion, Extension, Abduction, Adduction |
| Pivot | Neck (C1 and C2) | Rotation |
| Hinge | Elbow, Knee | Flexion, Extension |
| Gliding | Wrist, Ankle | Gliding, Sliding |
