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Quadriceps weakness can be caused by various injuries to the knee or hips, acquired myopathies (diseases that affect muscle tissue) such as Lyme disease and poliomyelitis, inherited myopathies such as certain muscular dystrophies and stroke, or neurological diseases such as multiple sclerosis or Bellâs palsy.
Muscular System Diseases. Muscular system diseases affect the normal working of the muscles in the body. The list of diseases covered in the following article, will help you learn about the different types of disorders that cause weakness and a wasting away of muscle tissue.Advertisement. Muscles are a very important part of our body.f the muscular system is affected by any disease or disorder, it leads to many minor and in some cases, major health problems. Not only do the disorders affect mobility, but also cause many other functional problems. Diseases of the Muscular System. There are about 650 muscles in the human muscular system.