Arthroscopy elbow, wrist, ankle, foot, and hip. Knee arthroscopy, or arthroscopic knee surgery, is an ineffective surgery that uses arthroscopic surgical techniques. People who undergo this surgery for "wear and tear" joint pain, including osteoarthritis and meniscal tears, usually have high hopes for the results, but repeated scientific studies have show that they actually end up with results that are no better than if they had skipped all of the pain, disruption, and risks of the surgery and instead only did the many hours of required post-surgery physical therapy. It has, in many cases, replaced the classic open surgery (arthrotomy) that
Effect of spaceflight on the human body of motion sickness for the first three days of travel due to the conflict between what the body expects and what the body actually perceives. Over time however the brain adapts and although these illusions can still occur, most astronauts begin to see "down" as where the feet are. People returning to Earth after extended weightless periods have to readjust to the force of gravity and may have problems standing up, focusing their gaze, walking and turning. This is just an initial problem, as they recover these abilities quickly. NASA jokingly measures SAS using the "Garn scale", named for United