Music was tested on critically ill, intubated ICU patients to see if Mozart could alleviate stress. After an hour of slow movements of Mozart's piano sonatas, they measured stress hormones, cytokines, heart rate and blood pressure. They found out that playing Mozart meant the patients needed less sedative drugs, and had lower stress hormone levels.
Medscape J Med 2008;10(1):20. Esoteric or Exoteric? Music in Medicine
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