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A Kinematic Description Of The Temporal Characteristics Of Jaw Motion For Early Chewing: Preliminary Findings, Erin M. Wilson, Jordan R. Green, Gary Weismer

Department of Special Education and Communication Disorders: Faculty Publications

Purpose: The purpose of this investigation was to describe age- and consistency-related changes in the temporal characteristics of chewing in typically developing children between the ages of 4 and 35 months and adults using high-resolution optically based motion capture technology.

Method: Data were collected from 60 participants (48 children, 12 adults) across 5 age ranges (beginners, 7 months, 12 months, 35 months, and adults); each age group included 12 participants. Three different food consistencies were trialed as appropriate. The data were analyzed to assess changes in chewing rate, chewing sequence duration, and estimated number of chewing cycles.

Results: The results …

The Development Of Jaw Motion For Mastication, Erin M. Wilson, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

The developmental course of early chewing has rarely been studied, although such knowledge is essential for understanding childhood feeding and swallowing disorders. The goal of this investigation was to quantitatively describe age- and consistency-related changes in jaw kinematics during early chewing development. An optical-motion tracking system was used to record jaw movements during chewing in 3-dimensions in 11 typically-developing participants longitudinally from 9–30 months of age. Age related changes in jaw movement were described for both puree and regular consistencies. The findings demonstrated that the development of rotary jaw motion, jaw motion speed, and management of consistency upgrades are protracted …

Early Speech Motor Development: Cognitive And Linguistic Considerations, Ignatius S. B. Nip, Jordan R. Green, David B. Marx

Department of Special Education and Communication Disorders: Faculty Publications

This longitudinal investigation examines developmental changes in orofacial movements occurring during the early stages of communication development. The goals were to identify developmental trends in early speech motor performance and to determine how these trends differ across orofacial behaviors thought to vary in cognitive and linguistic demands (i.e., silent spontaneous movements, babble, and first words). Movements of the lower lip and jaw were recorded using a three-dimensional motion capture system. Twenty-four infants were observed every 3 months, from 9 to 21 months of age. Jaw and lower lip speed, and lower lip range of movement increased with age. Silent spontaneous …

Coordinative Organization Of Lingual Propulsion During The Normal Adult Swallow, Erin M. Wilson, Jordan R. Green

Department of Special Education and Communication Disorders: Faculty Publications

Lingual propulsion during swallowing is characterized by the sequential elevation of the anterior, middle, and dorsal regions of the tongue. Although lingual discoordination underlies many swallowing disorders, the coordinative organization of lingual propulsion during the typical and disordered swallow is poorly understood. The purpose of this investigation was to quantitatively describe the coordinative organization of lingual propulsion during the normal adult swallow. Tongue movement data were obtained from the X-Ray Microbeam Database at the University of Wisconsin. Movement of four pellets placed on specific tongue regions were tracked in 36 healthy adult participants while they swallowed 10 cc of water …

More On The Role Of The Mandible In Speech Production: Clinical Correlates Of Green, Moore, And Reilly’S (2002) Findings And Methodological Issues In Studies Of Early Articulatory Development: A Response To Dworkin, Meleca, And Stachler (2003), James Paul Dworkin, Robert J. Meleca, Robert J. Stachler, Jordan R. Green, Christopher A. Moore, Kevin J. Reilly

Department of Special Education and Communication Disorders: Faculty Publications

Dworkin et al. comment: We would like to comment on Green, Moore, and Reilly’s article, which appeared in the February 2002 issue of this journal [Journal of Speech, Language, and Hearing Research]. In that investigation, these clinical researchers examined upper lip, lower lip, and mandibular movements during repetitive bisyllable word productions by infants, toddlers, young children, and adults with normal developmental and neurologic histories. Kinematic traces from these articulators were analyzed using a computer-based movement tracking system. Results revealed that these oral structures may have sequential neuromotor developmental schedules, characterized by more mature movement patterns for speech emerging …