Strokes, brain injuries, spinal cord injuries, infections, and a handful of other conditions affecting the central nervous system can cause hemiparesis or hemiplegia. “Hemi” denotes something occurring on one half of the body -- the left or the right side. Hemiparesis is weakness on half of the body, while hemiplegia refers to paralysis that affects just one side. Because paralysis is an extreme form of weakness and nerve dysfunction, hemiplegia is an extreme form of hemiparesis.
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