Post-polio syndrome (PPS) embodies the new neuromuscular symptoms that patients with prior paralytic poliomyelitis develop after a stable course from 20 to 40 years. These include new muscle weakness, fatigue, muscular atrophy, muscle pain and various secondary muscular complaints. Fundamental questions regarding the neurobiology of the motor neurones previously affected by the poliovirus, the ongoing changes of the reinnervating process, and the...