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Pain is difficult to measure. Unlike using a thermometer to measure body temperature, a blood test to measure blood glucose, or a magnetic resonance imaging (MRI) scan to detect a tumour, there are no instruments or tests that objectively measure pain. To understand why, one needs to understand what pain is. Pain is a perception, and like other perceptions (such as happiness, sadness, anxiousness), it reflects the sum of a lot of external and internal information interpreted by our brains. For example, we…
16.12.2018 · From The_Conversation_Africa