Relating to a mental health condition characterized by persistent, unwanted thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) that a person feels driven to perform. These symptoms cause significant distress and interfere with daily functioning.
From Latin 'obsidere' (to besiege, occupy) and 'compellere' (to drive together, force). The terms reflect how unwanted thoughts 'besiege' the mind and 'compel' repetitive actions, first formally described as a distinct disorder in the late 19th century.
OCD affects about 2-3% of the population and involves specific brain circuits connecting the orbitofrontal cortex, anterior cingulate cortex, and striatum. Contrary to popular misconceptions, OCD is not about being neat or organized - it's a debilitating condition where people might spend hours checking locks, washing hands until they bleed, or being paralyzed by fears of causing harm.
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