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Geriatrics Health Channel

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Osteoarthritis
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Aging changes in the bones - muscles - joints

Alternative Names

Osteoporosis and aging; Muscle weakness associated with aging

Information

Changes in posture and gait are as universally associated with aging as changes in the skin and hair.

The skeleton provides support and structure to the body. Joints are the areas where bones come together. They allow the skeleton to be flexible for movement. In a joint, bones do not directly contact each other. Instead, they are cushioned by cartilage, membranes, and fluid.

Muscles provide the force and strength to move the body. Coordination, although directed by the brain, is affected by changes in the muscles and joints. Changes in the posture and gait, weakness, and slowed movement are caused by changes in the muscles, joints, and bones.

AGING CHANGES

Bone mass or density is lost as people age, especially in women after menopause. The bones lose calcium and other minerals.

The spine is made up of bones called vertebrae. Between each bone is a gel-like cushion (intervertebral disk). The trunk becomes shorter as the disks gradually lose fluid and become thinner.

In addition, vertebrae lose some of their mineral content, making each bone thinner.

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