Abnormally slow movement or the inability to move quickly, often a symptom of Parkinson's disease or other neurological conditions.
From Greek 'brady' (slow) + 'kinesis' (movement). The term emerged in medicine as doctors classified different movement disorders in the early 1900s.
Bradykinesia is one reason Parkinson's patients can suddenly 'freeze'—their brain loses the ability to signal smooth, continuous movement, leaving them stuck mid-motion!
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