Post Polio Syndrome is characterized by which of the following?

Post Polio Syndrome is characterized by which of the following?

• A. Immediate paralysis during initial polio infection
• B. Progressive muscle deterioration decades after initial infection
• C. Spontaneous recovery
• D. Sensory loss without motor symptoms

Answer: (B)

Post-polio syndrome shows up as new or worsening muscle weakness and fatigue many years after the initial polio infection. The key idea is not a new infection but late deterioration of motor function in muscles that were previously affected. After polio, surviving motor neurons sprout to reinnervate lost muscle fibers, creating large motor units that keep function for years. Over time, those motor neurons or their connections can fail, leading to progressive weakening and increased fatigue. Sensation usually remains normal, so it isn’t about sensory loss. The other possibilities don’t fit because paralysis occurs during the acute infection, PPS isn’t simply spontaneous recovery, and PPS is not characterized by sensory-only problems.

Post-polio syndrome shows up as new or worsening muscle weakness and fatigue many years after the initial polio infection. The key idea is not a new infection but late deterioration of motor function in muscles that were previously affected. After polio, surviving motor neurons sprout to reinnervate lost muscle fibers, creating large motor units that keep function for years. Over time, those motor neurons or their connections can fail, leading to progressive weakening and increased fatigue. Sensation usually remains normal, so it isn’t about sensory loss. The other possibilities don’t fit because paralysis occurs during the acute infection, PPS isn’t simply spontaneous recovery, and PPS is not characterized by sensory-only problems.