Plural of dystonia; neurological disorders where muscles involuntarily contract, causing repetitive movements or abnormal postures.
From Greek 'dys-' (bad, difficult) + 'tonos' (tension, tone). The term emerged in medical literature in the early 20th century to describe muscle tone disorders that didn't fit other disease categories.
Dystonias are weird because your brain is basically sending the wrong 'tension settings' to your muscles—it's like a musician's hand cramping in a specific, repeating pattern. Some people develop writer's cramp or musician's focal dystonia, where only the muscles used for that specific task malfunction.
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