FROM OUR EXPERTS
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...
Alternative Names Muscular dystrophy - limb-girdle type (LGMD) Symptoms Typically, the first sign is pelvic muscle weakness (difficulty standing from a sitting position without using the arms, difficulty climbing stairs). The weakness starts in childhood to young adulthood. Other symptoms include: Abnormal, sometimes waddling, walk Joints that are fixed in a contracted position (late in the disease) Large and muscular-looking calves (pseudohypertrophy), which are not actually strong Loss of muscle mass, thinning of certain body parts Low back pain Palpitations or passing-out spells Shoulder weakness Weakness of the muscles in the face (later in the disease) Weakness in the muscles of the lower legs, feet, lower arms, and hands (later in the disease) Signs and tests Blood creatine kinase levels DNA testing Echocardiogram or ECG Electromyogram (EMG) testing Muscle biopsy
Definition Alternative Names Osteoporosis and aging; Muscle weakness associated with aging Information Changes in posture and gait (walking pattern) are as universally associated with aging as changes in the skin and hair. The skeleton provides support and structure to the body. Joints are the areas where bones come together. They allow the skeleton to be flexible for movement. In a joint, bones do not directly contact each other. Instead, they are cushioned by cartilage in the joint, synovial membranes around the joint, and fluid. Muscles provide the force and strength to move the body. Coordination is directed by the brain but is affected by changes in the muscles and joints. Changes in the muscles, joints, and bones affect the posture and gait, and lead to weakness and slowed movement. AGING CHANGES Bone mass or density is lost as people age, especially in women after menopause . The bones lose calcium and other minerals. The spine is made up of bones called vertebrae. Between each bone is a...
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