Abstract
Feeding is a rhythmic behavior that consists of several component cycle types. How the timing of these cycles changes over a complete feeding sequence is not well known. To test the hypothesis that cycle frequency/duration changes as a function of time spent feeding, we examined complete feeding sequences in six infant pigs, using EMG of mylohyoid and thyrohyoid as cycle markers. We measured the instantaneous frequency of sucking and of swallowing cycles in 19 sequences. Each sequence contained three qualitatively distinctive phases of sucking frequency. Phase 1 started with cycles at a very high frequency and quickly dropped to a more constant level with low variation, which characterized phase 2. Phase 3 had a steady level of frequency but was interspersed with a number of high- or low-frequency cycles. Each phase differed from the others in patterns of within-phase variation and among-phase variation. Phase 2 had the least variation, and phase 3 had the largest range of frequencies. The number of sucks per swallow also differed among phases. These patterns, which characterize normative feeding, could indicate a physiologic basis in satiation. In human infant clinical studies, where data collection is often limited, these results indicated the utility of collecting data in different phases. Finally, these results can be used as a template or pattern with which to assess clinically compromised infants.
Similar content being viewed by others
References
Arvedson JC. Assessment of pediatric dysphagia and feeding disorders: clinical and instrumental approaches. Dev Disabil Res Rev. 2008;14(2):118–27.
Book SA, Bustad LK. The fetal and neonatal pig in biomedical research. J Anim Sci. 1974;38(5):997–1002.
Campbell-Malone R, et al. Ontogenetic changes in mammalian feeding: insights from electromyographic data. Integr Comp Biol. 2001;51(2):282–8.
Chi-Fishman G, Sonies BC. Motor strategy in rapid sequential swallowing: new insights. J Speech Lang Hear Res. 2000;43(6):1481–92.
Crompton AW, Thexton AJ, German RZ. Development of the movement of the epiglottis in infant and juvenile pigs. Zoology. 2008;111:339–49.
Delaney AL, Arvedson JC. Development of swallowing and feeding: prenatal through first year of life. Dev Disabil Res Rev. 2008;14(2):105–17.
Ding P, et al. Unilateral superior laryngeal nerve lesion in an animal model of dysphagia and its effect on sucking and swallowing. Dysphagia. 2013;28(3):404–12.
Ding P. The effect of unilateral superior laryngeal nerve lesion on swallowing threshold volume. Laryngoscope. 2013;123(8):1942–7.
Franks HA, Crompton AW, German RZ. Mechanism of intraoral transport in macaques. Am J Phys Anthropol. 1984;65(3):275–82.
Franks HA, et al. Mechanism of intraoral transport in a herbivore, the hyrax (Procavia syriacus). Arch Oral Biol. 1985;30(7):539–44.
German RZ, Crompton AW. Ontogeny of suckling mechanisms in opossums (Didelphis virginiana). Brain Behav Evol. 1996;48(3):157–64.
German RZ, Crompton AW. The Ontogeny of Feeding in Mammals. In: Schwenk K, editor. Feeding: Form, Function and Evolution in Tetrapod Vertebrates. San Diego: Academic Press; 2000. p. 449–57.
German RZ, et al. Food transport through the anterior oral cavity in macaques. Am J Phys Anthropol. 1989;80(3):369–77.
German RZ, et al. Determinants of rhythm and rate in suckling. J Exp Zool. 1997;278:1–8.
German RZ, Crompton AW, Thexton AJ. The role of animal models in understanding feeding behavior in infants. Int J Orofacial Myology. 2004;30:20–30.
German RZ, Crompton AW, Thexton AJ. Integration of the reflex pharyngeal swallow into rhythmic oral activity in a neurologically intact pig model. J Neurophysiol. 2009;102(2):1017–25.
Hiiemae KM. Feeding in Mammals. In: Schwenk K, editor. Feeding: form, function and evolution in tetrapod vertebrates. San Diego: Academic Press; 2000. p. 411–48.
Hiiemae KM, Crompton AW. Mastication, food transport and swallowing. In: Hildebrand M, et al., editors. Functional Vertebrate Morphology. Cambridge: Harvard University Press; 1985. p. 262–90.
Hiiemae KM, Palmer JB. Food transport and bolus formation during complete feeding sequences on foods of different initial consistencies. Dysphagia. 1999;14(1):31–42.
Holman SD, et al. Regional variation in geniohyoid muscle strain during suckling in the infant pig. J Exp Zool A Ecol Genet Physiol. 2012;317(6):359–70.
Holman SD, Campbell-Malone R, et al. Development, reliability, and validation of an infant mammalian penetration-aspiration scale. Dysphagia. 2013;28(2):178–87.
Holman SD, Waranch DR, et al. Sucking and swallowing rates after palatal anesthesia: an electromyographic study in infant pigs. J Neurophysiol. 2013;110(2):387–96.
Holman SD, et al. Swallowing kinematics and airway protection after palatal local anesthesia in infant pigs. Laryngoscope. 2014;124(2):436–45.
Konow N, et al. Regional differences in length change and electromyographic heterogeneity in sternohyoid muscle during infant mammalian swallowing. J Appl Physiol. 2010;109:439–48.
Lefton-Greif MA, McGrath-Morrow SA. Deglutition and respiration: development, coordination, and practical implications. Semin Speech Lang. 2007;28(3):166–79.
Rommel N, et al. Development of pharyngo-esophageal physiology during swallowing in the preterm infant. Neurogastroenterol Motil. 2011;23(10):e401–8.
Sack WO. Pig anatomy and atlas. Ithaca: Veterinary Textbooks; 1982.
Thexton AJ, Crompton AW, German RZ. Electromyographic activity during the reflex pharyngeal swallow in the pig: doty and Bosma (1956) revisited. J Appl Physiol. 2007;102(2):587–600.
Thexton AJ, et al. Impact of rhythmic oral activity on the timing of muscle activation in the swallow of the decerebrate pig. J Neurophysiol. 2009;101(3):1386–93.
Thexton AJ, Crompton AW, German RZ. EMG activity in hyoid muscles during pig suckling. J Appl Physiol (1985). 2012;112(9):1512–9.
Weaver ME, Jump EB, McKean CF. The eruption pattern of permanent teeth in miniature swine. Arch Oral Biol. 1969;14(3):323–31.
Weckmueller J, Easterling C, Arvedson J. Preliminary temporal measurement analysis of normal oropharyngeal swallowing in infants and young children. Dysphagia. 2011;26(2):135–43.
Wentzel SE, Konow N, German RZ. Regional differences in hyoid muscle activity and length dynamics during mammalian head shaking. J Exp Zool A Ecol Genet Physiol. 2011;315(3):111–20.
Wykes LJ, Ball RO, Pencharz PB. Development and validation of a total parenteral nutrition model in the neonatal piglet. J Nutr. 1993;123(7):1248–59.
Acknowledgments
We appreciate Laurie Pipitone for her support during data collection. We also thank Melanie Albano and Kristy Koenig for their work during animal surgery. Stacey L. Lukasik and Regina Campbell-Malone provided thoughtful support and assistance during the whole study. Allan Thexton’s insights improved this article significantly. This study was funded by the National Institutes of Health (DC009980 to RZG).
Conflict of interest
None
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Gierbolini-Norat, E.M., Holman, S.D., Ding, P. et al. Variation in the Timing and Frequency of Sucking and Swallowing over an Entire Feeding Session in the Infant Pig Sus scrofa . Dysphagia 29, 475–482 (2014). https://doi.org/10.1007/s00455-014-9532-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00455-014-9532-y