Red Book® Online -- Image of the Week for December 17, 2007

Image of the Week for December 17, 2007

Poliovirus Infections

Poliovirus Infections. A photomicrograph of skeletal muscle tissue revealing myotonic dystrophic changes as a result of Polio Type III. When spinal neurons die, Wallerian degeneration takes place resulting in muscle weakness of those muscles once innervated by the now dead neurons (denervated). The degree of paralysis is directly correlated to the number of deceased neurons.
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