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Coordination between breathing and swallowing. Swallowing occurs during expiration, and respiration resumes with expiration (A: E–SW–E pattern). Swallowing occurs during inspiration (B: I-SW pattern), and respiration resumes with inspiration (C: SW-I pattern). The I-SW and SW-I patterns are unusual patterns, but may even occur in healthy subjects. E–SW–E, expiration–swallow–expiration; I-SW, swallowing during inspiration; SW-I, swallowing immediately followed by inspiration.
