Senior citizens in the United States, Asia, and the Middle East agree on at least one thing. After having a knee joint replaced, they all know that bending the knee fully is the key to many, many daily activities. Getting a new knee joint isn't enough. Full knee flexion is also needed. Researchers at the Biomotion Foundation in Palm Beach, Florida, are doing their part to help seniors with this problem. They studied 121 patients with 16 different types of joint replacements. Fluoroscopy, a special type of X-ray, was used to show the patients' knee motion on a TV screen. The researchers found that there is more knee flexion when the thighbone (femur) rests more toward the back of the lower leg bone (the tibia). This position is called posterior femoral position. The type of implant and its shape decide this position. Some implants allow the femur to move freely forward and back during knee flexion. Others push the femur forward during flexion. One implant forces the femur backward during...
Human beings are well designed for many things. We have large brains for poetry and quantum mechanics; we are good long distance runners, and of course have these awesome opposable thumbs. Unfortunately, some parts are not designed very well for our 21st century lifestyles. The low back , or lumbar spine, is first on my list for sending back (or forward?) to the engineers. A close second though might be the " knee cap " or patellofemoral joint.
The "knee cap" or patella is an ovoid shaped bone whose main purpose is to act as a fulcrum that big muscle on the front of your thigh, the quadriceps. (I'll wait while you grab your high school physics book). There are plenty of folks who do not have patellae, but because this causes the quad muscle to work inefficiently, few of these folks can run or climb stairs well. The design issue with the patella is that it articulates, or rubs up against, the end of the femur bone (thus the "patellofemoral" joint). For those of us who have pa...
Hello, I have recently been suffering from severe headaches that originate behind my left eye, behind my ear, to the base of my neck. It hurts to cough, sneeze, or even bend over to pick something up. I had a CT of the sinuses and it turned up nothing. My doctor put me on 800 mg ibuprofen, but I'd rather get to the root cause and not just the symptoms. Any ideas on what it can be? Sylvia.
The symptoms you describe are often symptoms of Migraine, but not always. That said, nobody can diagnose via the Internet, so you definitely need to find a doctor who understands Migraine and headaches . If you have trouble finding a doctor, there's a link below to our listing of patient recommended specialists.
One thing you can do to help you and your doctor determine what's going on is to keep a Migraine and headache diary. You can download a free diary workbook from our article Your Migraine and Headache Diary .
Good luck, John Claude ...
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