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The authors evaluated changes in intermuscular coherence (IMC) of orofacial and speech breathing muscles across phase of speech production in healthy younger and older adults. Sixty adults (30 younger = M 26.97year; 30 older = M 66.37year) read aloud a list of 40 words. IMC was evaluated across phase preparation (300ms before speech onset), initiation (300ms after onset), and total execution (entire word). Orofacial IMC was lowest in the initiation, higher in preparation, and highest for the total execution phase. Chest wall IMC was lowes