What best describes the primary problem in Muscular Dystrophy (MD)?

• A. Nerve damage causing paralysis
• B. Autoimmune attack on muscle fibers
• C. Muscle breakdown over time due to defective muscle proteins
• D. Inflammation causing pain

Answer: (C)

Muscular dystrophy is driven by genetic mutations that disrupt structural proteins in muscle fibers. This makes the muscle cells fragile and prone to damage with use, so over time the fibers break down and are replaced by fat and fibrous tissue. That progressive loss of functional muscle tissue explains the growing weakness you see in MD. It’s not caused primarily by nerve damage, an autoimmune attack, or inflammation as the main driver. For example, in Duchenne muscular dystrophy the dystrophin protein is missing, illustrating how a defective muscle protein leads directly to fiber degeneration. So the primary problem is muscle breakdown over time due to defective muscle proteins.