A K Ventura1, L B Inamdar, J A Mennella. 1. Monell Chemical Senses Center, Philadelphia, PA, USA; Department of Nutrition Sciences, College of Nursing and Health Professions, Drexel University, Philadelphia, PA, USA.
Abstract
BACKGROUND: Understanding the dynamics of feeding is essential for preventing accelerated weight gain during infancy, a risk factor for obesity. OBJECTIVES: Because infants satiate on larger volumes of cow milk formula (CMF) than CMF enriched with the free amino acid glutamate (CMF + glu), we used this model system to determine whether infants displayed consistent behaviours despite satiating on lower volumes. METHODS: In this laboratory-based, within-subject experimental study of ≤4-month-old infants (n = 41) and their mothers, infants were videotaped while feeding to satiation CMF on one test day and CMF + glu on the other, in counterbalanced order. Each video-recording was analysed frame-by-frame for frequency and timing of behaviours. RESULTS: Infants' behaviours were consistent in types and frequency but were displayed sooner when feeding CMF + glu compared with CMF. The less responsive the mother's feeding style, the less consistent the infant displayed behaviours across the two formula meals (P = 0.05). Infants who spat up (a possible sign of overfeeding) consumed more formula (P = 0.01) and had less responsive mothers (P = 0.04) compared with the other infants. CONCLUSIONS: Infants are consistent in their behavioural displays during feeding at this developmental age. Regulation of intake and signalling of satiation during bottle-feeding are associated with formula composition and maternal feeding style.
BACKGROUND: Understanding the dynamics of feeding is essential for preventing accelerated weight gain during infancy, a risk factor for obesity. OBJECTIVES: Because infants satiate on larger volumes of cowmilk formula (CMF) than CMF enriched with the free amino acidglutamate (CMF + glu), we used this model system to determine whether infants displayed consistent behaviours despite satiating on lower volumes. METHODS: In this laboratory-based, within-subject experimental study of ≤4-month-old infants (n = 41) and their mothers, infants were videotaped while feeding to satiation CMF on one test day and CMF + glu on the other, in counterbalanced order. Each video-recording was analysed frame-by-frame for frequency and timing of behaviours. RESULTS:Infants' behaviours were consistent in types and frequency but were displayed sooner when feeding CMF + glu compared with CMF. The less responsive the mother's feeding style, the less consistent the infant displayed behaviours across the two formula meals (P = 0.05). Infants who spat up (a possible sign of overfeeding) consumed more formula (P = 0.01) and had less responsive mothers (P = 0.04) compared with the other infants. CONCLUSIONS:Infants are consistent in their behavioural displays during feeding at this developmental age. Regulation of intake and signalling of satiation during bottle-feeding are associated with formula composition and maternal feeding style.
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