The question is incomplete as it does not provide 7 major joints. However, based on the context provided, these are 6 types of synovial joints in the body:
While there isn't a definitive list of the 7 "major" joints that is universally agreed upon, we can discuss the 6 types of synovial joints, which are often considered major due to their range of motion and commonality throughout the body. These joints allow for a wide array of movements essential for daily activities.
Types of Synovial Joints
Here's a breakdown of the different types of synovial joints, incorporating the reference information:
| Joint Type | Description | Example(s) | Movement |
|---|---|---|---|
| Ball and Socket | The rounded head of one bone sits in the cup of another, permitting movement in all directions. | Hip, Shoulder | Movement in all planes, including rotation. |
| Hinge | Allows movement in one plane, similar to a door hinge. | Elbow, Knee, Ankle | Flexion and extension. |
| Condyloid (Ellipsoidal) | An oval-shaped condyle fits into an elliptical cavity. | Wrist | Flexion, extension, abduction, adduction, and circumduction. |
| Pivot | Allows for rotational movement around a single axis. | Atlantoaxial joint (neck), Radioulnar joint (forearm) | Rotation. |
| Gliding (Plane) | Allows for gliding or sliding movements. | Intercarpal and intertarsal joints (wrists and ankles) | Gliding, sliding, or planar movements. |
| Saddle | Both bones have a saddle shape, allowing for a wide range of motion. | Carpometacarpal joint of the thumb | Flexion, extension, abduction, adduction, circumduction, and opposition. |
Understanding these joint types is crucial for understanding human movement and how the skeletal system functions.
