Sah says better matches may also someday replace the metal and plastic prostheses used for those with degenerated joints. For those who aren't Bo Jackson types that want to play football again. But it does have some limitations in that it will tend to wear out even in more sedentary type people after 10 to 20 years or so. For Science Today, I'm Larissa Branin. This is Science Today.
Depression can strike at any age, but it's often associated with the elderly.
Patricia Arean, a professor of psychiatry at the University of California, San Francisco says that's a common misconception. So in fact, it's less common in older patients. But Arean admits the belief that aging contributes to depression makes sense conceptually. A person over the age of 65 tends to have at least one chronic illness that they're faced with and that in some ways prevents them from doing activities that they used to do at a certain level. Friends and family die off, and so it makes sense that if you're faced with all of these stressors that you would be more likely to become depressed.