FROM OUR EXPERTS
The human knee can bend up to 160 degrees. This much motion allows us to easily do activities like getting in and out of the bathtub. It also makes it possible to squat down to check the line for a putt on the green while playing golf. Others use this amount of flexion to kneel or to squat while gardening, praying, or doing work tasks. The knee rarely bends this far again after a knee joint replacement. The average patient has between 100 and 115 degrees of knee bend. Knee flexion after total knee replacement (TKR) rarely goes beyond 120 degrees. The reasons for this limit in motion are many and varied. Researchers report factors present before, during, and after the operation that can affect knee flexion. In this article, doctors from Harvard Medical School outline each of those factors and discuss them. The doctors say that to increase knee flexion, we must first know how the healthy human knee works. Then limiting factors can be changed to mimic the normal knee. Three TKR implants o...
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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