Different Body Joints

Topics: Joints, Joint, Ball and socket joint Pages: 2 (351 words) Published: June 20, 2013
Hinge joints
A hinge joint is the simplest type of joint. It is found in the elbows and the joints of the fingers and toes. Hinge joints allow movement in only one direction. The hinge joint of the knee, the body's largest joint, is unusual because it can swivel on its axis, allowing the foot to turn from side to side. Therefore, the knee is constantly rolling and gliding during walking.

Gliding joints
Gliding joints are the surfaces that are flat or slightly curved. These joints allow sliding or back-and-forth motion and twisting movements. Most of the joints within the wrist and ankle, as well as those between the articular processes of adjacent vertebrae, belong to this group. The sacroiliac joints and the joints formed by ribs 2 though 7 connecting with the sternum are also gliding joints.

Pivot joints
A pivot joint is a rotation of one bone around another. An example of this would be at the top of the neck, which is also interpreted as the atlas and the axis bones. In the forearms the radius and ulna twist arround each other.

Compound joints
These joints are made up of several joints between a number of different bones. The bones articulate with one another in different ways, allowing for a variety of movements such as the set of joints which operate the movement of the skull on the vertebral column.

Movement of the joint
Elevation: The upward movement of structures of the body. For example, elevation of a shoulder joint raises the corresponding arm vertically upwards. Depression: The downward movement of structures of the body. For example, depression of a shoulder joint lowers the corresponding arm vertically downwards Protraction: The movement of a body part in the anterior direction, i.e. forwards. Retraction: The movement of a body part in the posterior direction, i.e. backwards. Eversion: A movement in which the plantar surface of the foot rotates away from the mid-line of the body. Another way to describe this movement is to say...
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