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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...
Muscle pain happens to most people. After a rigorous workout, muscles can be sore for days. That’s normal muscle pain. Abnormal muscle pain is a persistent pain that does not go away with rest. The pain is deep and often unbearable. Further investigation is needed for abnormal muscle pain.
The first investigation step is laboratory tests. Pain does not accompany all muscle diseases, but an elevated creatine phosphokinase (CPK) usually does. The CPK enzyme is found in the skeletal muscles as well as the heart and brain. Non-painful causes of an elevated CPK include muscular dystrophy, dementia and motor neuron diseases. Painful conditions associated with an elevated CPK include sickle cell disease and polymyositis . Besides pain, other symptoms might provide diagnostic clues like muscle weakness which typical in polymyositis. If anemia is present, then sickle cell disease is more likely. Both polymyositis and sickle cell disease can lead to the most severe form of muscle di...
Alternative Names Ischemic contracture Symptoms The main symptom is pain that does not improve with rest or pain medications, and continues to get worse with time. If the pressure is allowed to continue, there will be: Decreased sensation Paleness of the skin Weakness Signs and tests The doctor will perform a physical exam. If you have compartment syndrome in the forearm, you will have severe pain when the doctor moves the fingers up and down. Your forearm may be very swollen and shiny. You will feel pain when your forearm is squeezed. The diagnosis can be confirmed with a test that directly measures pressure in the area. This involves inserting a needle into the affected area. The needle is attached to a pressure meter. There is a specific pressure level that confirms the diagnosis of compartment syndrome. Treatment involves releasing the pressure in the forearm. The fingers and wrist can also be stretched so that they are in a bent (flexion) position to avoid contracture. The fingers and hand...
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