This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.A paucity of information regarding the essential capacities underlying speech development precludes a complete model of communicative development for both normal and disordered speech. A primary objective of this research is to identify those physiologic proficiencies underlying the typical development of motor control for speech and to compare these data with atypical speech development. This information may detect early symptoms and describe atypical coordination noted for a given developmental speech disorder.Coordinated movements across the respiratory, laryngeal, and oromandibular systems is quite organized during the isolated production of speech sounds, such as /p/ (e.g., pat) and /b/ (e.g., bat). Isolated productions of these speech sounds by adults reveal differences in coordination that can be measured. This current study is designed to investigate differences in coordination between children and adult speakers producing similar American-English and Mexican-Spanish speech sounds, /p/ and /b/. This investigation will use these cross-linguistic data to understand how linguistic constraints influence motor commands and how motor constraints delimit linguistic goals. The development of this normal model of coordination during specific productions of speech will be used for future investigations of disordered speech productions.
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