Poliomyelitis

(pol-e-o-mi-el-i’ ’-tis) [ttoTiioc, through a quartz-crystal or solutions of cergray; /uvsTidg, marrow; trig, inflammation]. tain substances (rotatory P.). 3. The de- Inflammation of the gray matter of the spinal posit of gas-bubbles (hydrogen) on the eleccord. P., Acute Anterior, infantile paralytronegative plate of a galvanic battery, sis, an acute inflammation of the anterior whereby the flow of the current is impeded, horns of the gray matter of the spinal cord. and owing to the negative plate covered with It is most common in children, coming on hydrogen being more electropositive than the during the period of the first dentition and zinc-plate, the difference in potential between producing a paralysis of certain muscle-groups the two plates is reduced. or of an entire limb. The onset is sudden, 513