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Do your knees feel wobbly or are your legs giving way? If you answered yes to either one of these questions, then you might be experiencing a condition known as Arthrogenic Muscle Inhibition. That’s a fancy way to say that the muscle weakness is caused by joint arthritis, injury and pain.
As a protective mechanism, the nervous system has reflexes that shut down muscle activity in order to protect the injured body part. In the case of an injured knee, ankle or other joint, doctors have observed significant muscle deactivation in response to joint swelling, pain, and arthritis. 1
In response to knee injury, surgery or arthritis, the quadriceps muscles become very weak. Even the hamstring and buttocks muscles are weakened in order to protect the knee. In response to an ankle injury or other painful process, the lower leg muscles in the calf start to lose their power. Researchers are even able to duplicate this arthrogenic muscle response by simulating joint swelling a...
Do patients with knee pain from osteoarthritis (OA) increase the weight and load through the knee after taking pain relievers? This is the first study to try and find an answer to the question. Researchers at the University of Chicago say pain relief increases the load while walking, but not during stair climbing. They think other factors may be involved in stair climbing. Many patients with OA end up with increased wear and tear on the inside edge of the knee. Pain causes them to limp or shift the weight to the other leg. Their walking speed slows down, and their rhythm becomes uneven. In this study, authors compared two groups: adults with OA, and adults without OA. The study was done in a motion analysis lab. Each group walked on a walkway that can measure force from the ground up through the knee. Speed and stride length were also measured. Three trials of walking and stair climbing were done. Then the OA group got a knee injection for pain. All patients reported pain relief. After 1...
The local weather forecast calls for pain increasing over the next five days and tapering off towards the end of the week. Sound familiar? Many people who have arthritis are very familiar this forecast and know that weather effects pain severity. In fact, many people know what the weather is doing just by how a joint feels. Pain, stiffness and swelling can be as accurate at forecasting the weather as a meteorologist. And those who live in certain climates know exactly how painful some climates can be. What do scientists have to say about this weather phenomenon? Are the rumors true? Does joint pain forecast the weather?
Ouch, it's cold outside. Just looking at temperature, one can easily conclude that l ow temperatures increase pain not only in a joint, but everywhere. Knee pain , rheumatoid pain, and osteoarthritis pain all show consistent increases in severity has the mercury plunges. The reason for this phenomenon probably has something to do with nerve conduction slowing in t...
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