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Superimposition of axial slices to compare pharyngeal articulation—subject M1, tokens [asa] vs [aza]. Higher slice numbers correspond to higher positions in tract. Slice 1 (top left): trachea; slice 7: supraglottal slice showing piriform sinuses; slice 13: midpharynx and epiglottis; slice 25 (bottom right): oral cavity beneath hard palate.
