Mental retardation - progressive spasticity refers to a form of intellectual disability that is characterized mainly by below-average mental ability, abnormal muscle stiffness and irregular movements called spasms. Thus, individuals with this form of intellectual disability often have problems with tasks involving physical activity. Muscle spasms occur because of problems with the nervous system, which is the system which allows the brain to communicate with the muscles. Like other individuals with intellectual disability, an individual with this condition often has problems with reasoning and solving problems, as well as performing day-to-day tasks. The condition is often diagnosed during childhood. Doctors diagnose this form of intellectual disability if spasms and abnormal stiffening of muscles are observed. Signs like walking and talking late, slow mastering of basic tasks, and having difficulty remembering things may also suggest this condition in children. Treatment is based on a case-by-case basis and depends on the specific needs of the patient. Muscle specialists may suggest physical therapy and devise an exercise regimen to combat the muscle stiffening symptoms. Doctors seek help from various therapists and community services to provide support and care for families affected by intellectual disability.