Confusion
Confusion is a behavioural state of reduced mental clarity, coherence, comprehension and reasoning. The causes may be organic or psychiatric (the reader is referred to a textbook of psychiatry for these conditions). The organic causes are listed below.
History
Onset
Sudden onset of confusion may be precipitated by head injuries, epilepsy, stroke and metabolic disorders. Systemic infection, systemic disease and cerebral metastasis tend to pursue a more gradual onset.
Past medical history
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