Analgesia
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Analgesia, defined as the loss of the sense of pain, can occur either in conjunction with the loss of other types of sensitivity or in isolation, such as in dissociated sensory disorders, spinal cord gray matter diseases, or pathological processes in the medulla oblongata. It can also manifest as delayed pain perception, where pain is felt significantly later than the stimulus, as observed in tabes dorsalis.
Encyclopedia entry (1928–1936)
ANALGESIA (from the Greek a- negative particle and algos-pain), loss of the sense of pain, may occur either in connection with the loss of other types of sensitivity or in isolation, in so-called dissociated sensory disorders, in diseases of the gray matter of the spinal cord, and in pathological processes in the medulla oblongata. Sometimes (in tabes dorsalis) it is expressed as a delayed sensation of pain—the pain is felt not at the moment of irritation (for example, a prick), but significantly later.
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“Analgesia.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/analgesia/