Reduced sensitivity to pain affecting only one half or one side of the body.
From 'hemi-' (half) + 'hypo-' (under/reduced) + Greek 'algesis' (sense of pain), a neurological term describing partially diminished pain perception.
Imagine touching a hot stove and feeling less pain on one side of your hand—that's hemihypalgesia, and it often indicates a stroke or spinal cord problem on the opposite side of the brain, showing how our nervous system creates a strange opposite-side map.
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