Joints
Diffrent types of joints of the body
types of joints
fixed
Slightly movable
Slightly movable joints are sometimes called cartilaginous joints.
The bones are separated by a cushion of cartilage. The joints between the vertebrae in the spine are cartilaginous joints.
The bones can move a little bit, but ligaments stop them moving too far. This is why we can bend, straighten and rotate through the back, but not too far.
FREELY MOVABLE
Synovial movable
90% of the joints in the body are synovial joints. They are freely movable.
Synovial joints contain synovial fluid which is retained inside a pocket called the synovial membrane. This lubricates or ‘oils’ the joint.
All the moving parts are held together by ligaments.
These are highly mobile joints, like the shoulder and knee.
Six types of Synovial Joint
Pivot
Movement at joint = Rotation of one bone around another.
Examples = Top of the neck.
Ball and Socket
Abduction/Internal & External Rotation.
Examples = Shoulder and Hip.
Saddle
Abduction/Circumduction.
Examples = joint of the thumb.
Condyloid
Abduction/Circumduction.
Examples = joints in your wrist.