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Descriptive scale of sucking stages: This scale comprises five stages based on presence/absence of suction and rhythmicity of suction and expression components during nutritive sucking from a bottle. Sample tracings with corresponding range of amplitudes are presented [from Lau C, Kusnierczyk I, Quantitative evaluation of infant's nonnutritive and nutritive sucking. Dysphagia 2001; 16:58; reproduced with permission from Springer Science and Business Media]
