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Active Retirees : Active Retirees Feb-March 2012
Active RetireesTM | 35 around the traps HEALTH R emember the lyrics of the children’s song: “the knee bone’s connected to the thigh bone”? Well as simple as that sounds, it’s right. Those connections are called joints. There are over 200 joints in the human body and every single one of our bones (excluding one in our throat) couples with another bone at a joint. Joints are divided into three different categories: immoveable, slightly moveable and freely moveable. Immovable joints are bones that are connected but don’t move, such as in the skull. Slightly moveable joints have only limited movement, such as in the spine. Freely moveable joints allow a large range of movement and make up the bulk of the joints in your body. There are six different types of freely moveable joints: • Ball and socket joints where one bone is cupped by another, such as the hip. These joints have a large range of movement. • Saddle joints can move in all directions, but not rotate, such as the thumb. • A hinge joint opens and closes in one direction, such as the knee. • Condyloid joints are in the fingers and allow movement without rotation. • A pivot joint can swivel, such as the elbow. • Gliding joints permit limited movement where smooth surfaces, such as in the wrist, glide over one another. But there’s more to a joint than the connecting bones. Joints are linked by ligaments and supported by cartilage that cushions the bones so they don’t grind against one another. Muscles also play a role because tendons » Healthy joints are the key to a mobile life. Simone McClenaughan reveals the best ways to keep moving. Spring in your step Thinkstock
Active Retirees Dec-Jan 2012
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