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Rib cage and abdominal movement during utterance production in infants around the first year of life
Pike, Jennifer R.
Pike, Jennifer R.
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Pike, Jennifer R.
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2014-07
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Electronic dissertations
Electronic dissertations
Electronic dissertations
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Abstract
Introduction: The chest wall is composed of two primary components: the rib cage and the abdomen.
In healthy adults, these two mechanisms are coupled during both breathing at rest and speech
breathing. However, with regards to infants the coupling that is observed in adults is not yet
present in infants. Little is known about when during human development the coupling of the two
components occurs. This study explored the contribution to chest wall movement that each component
plays during single-syllable utterances by infants around the first year of life.
Methods: Vocalizations and breathing kinematics were recorded from 10 infants between 9 and 16
months of age during vocal play with their mothers. The movement of both the rib cage and the
abdomen were measured during production of single-syllable utterances. The relative contributions
of the rib cage and abdomen were compared to see how they impacted chest wall movement during
utterance production. Contributions were measured as a percentage of total chest wall movement.
Results: For the infants in the study, it was determined that the abdomen contributed to a greater
degree than the rib cage during the total respiratory cycle and the inspiratory phase, and that
both the rib cage and the abdomen contributed to differing degrees during the expiratory phase.
Discussion: The findings relate the role of the rib cage and abdomen to total chest wall movement
during utterance production. This study adds information about how breath support for utterance
production develops during infancy. By studying further this particular aspect of chest wall
development, knowledge may be gained that could aid in the early identification of infants who
might be developing atypically.
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Thesis (M.A.)--Wichita State University, College of Health Professions, Dept. of Communication Sciences and Disorders
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Wichita State University
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Copyright 2013 Jennifer R. Pike