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Joints - Partially Movable Joints
Transcript of Joints - Partially Movable Joints
- They are joints which:
1) can move freely
2) are found where movement is most important
3) most common type of joint in the body.
What are Immovable Joints?
An immovable joint is a place in the body where two bones are joined together but where little or no movement is normally possible and where no joint cavity exists, as is present in the majority of joints in the body in order to allow for a range of movement.Some examples where immovable joints are found in the human body are:
- Between the joints bones of the skull.
- Between the joints in the pelvis.
Joints of the Human Body
by Aagney, Gautham, Harsha, Madhovarshini
Types of Freely Movable Joints
The two main types of freely movable joints are:
Ball and Socket Joint
The ball-and-socket joints have the most range of movement by the joints. The spherical head of one bone lodges in the spherical cavity of another. In the shoulder joint, the humerus (upper arm bone) fits into the socket of the shoulder blade. Because the socket is shallow and the joint loose, the shoulder is the body's most mobile joint. The hip joint is less mobile than the shoulder, but it is more stable.
What are partially movable joints?
Slightly moveable joint are joints which have only limited range of movement and this is due to either fibrous tissue or cartilage.
Some examples on where you can find them are:
- Between the vertebrae of the spinal cord.
- where ribs connect the sternum
- where ribs connect the spinal column
Types of Freely Movable Joints
The hinge joint is a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane. Some examples of hinge joints are:
- Between the leg and foot.
- In the knee.
- In the elbow.
What are Joints?
The point at which two separate bones meet is known as a joint.
The three major categories of joints are:
Here is a link to understand the different types of joints:
Here is a link for a quiz on joints:
Gliding joints or Plane joint or Arthrodial joint are flat or only slightly curved.They are partially movable joint. They only allow movements sideways or movement in one direction.
Some places where they are found are:
- Bones of the wrist
- Bones of the ankle
- Between Vertebrae
A pivot joint is a type of partially movable joint.Pivot joints allow for rotation, which can be external (for example when rotating an arm outward), or internal (as in rotating an arm inward).In pivot joints, the axis of a surface is parallel with the longitudinal axis of the bone.
Synovial joint is another name for freely movable joints.