Two photomicrographs showing the thoracic spinal cord depicting degenerative changes due to Polio Type III. When the neurons themselves 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. Optimised and enhanced versions of images produced by the US Centers for Disease Control and Prevention / credit CDC

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Photo credit: © World Illustrated / Alamy / Afripics
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Keywords: 35mb8bit, cdc, cord, degeneration, denervated, digitaleye, disease, diseased, electron, global, health, illness, infected, infection, infectious, jamie, laboratory, magnified, marshall, medical, microbe, microbes, microscope, microscopy, misc22_cdc026, pathology, photomicrograph, polio, poliovirus, science, security, specimen, spinal, thoracic, tribaleye, viral, virions, virus, wallerian