Neuromuscular disease affects the peripheral nervous system, neuromuscular junctions, and skeletal muscles, leading to muscle weakness and atrophy. Symptoms can include muscle spasms, twitching, and pain. Examples of these disorders include amyotrophic lateral sclerosis, muscular dystrophy, myasthenia gravis, and spinal muscular atrophy. Causes can be genetic, autoimmune, or unknown, with many having no cure but treatments to manage symptoms and improve quality of life.