caa a22 4500 467935726 CHVBK 20180406152956.0 cr unu---uuuuu 170328e20061001xx s 000 0 eng 10.1007/s00455-006-9045-4 doi (NATIONALLICENCE)springer-10.1007/s00455-006-9045-4 Oral and Oropharyngeal Perceptions of Fluid Viscosity Across the Age Span [Elektronische Daten] [Christina Smith, Jeri Logemann, Wesley Burghardt, Steven Zecker, Alfred Rademaker] Research demonstrates that varying sensory input, including the characteristics of a bolus, changes swallow physiology. Altering the consistency of fluids is a common compensatory technique used in dysphagia management to facilitate change. However, it is not known what variations in viscosity can be perceived in the oral cavity or oropharynx or if age affects oral and oropharyngeal perceptions of fluid viscosity. This study aims to establish the ability of normal adults to perceive fluid viscosity in the oral cavity and oropharynx and to determine if, within this population, there are age-related changes in oral and oropharyngeal perceptions. Sensitivity was established by deriving the exponent for the psychophysical law for fluid viscosity in both the oral cavity and the oropharynx, using modulus-free magnitude estimation with Newtonian fluids of corn syrup and water. Sixty normal volunteers, aged 21-84 years, participated. Results indicate that the exponent for oral perception of fluid viscosity was 0.3298, while for oropharyngeal perception it was 0.3148. Viscosity perception deteriorates with increasing age. Men exhibited a more marked deterioration in sensitivity than women. This study contributes to the literature on oral and oropharyngeal perceptions and on aging. The results provide a basis for work with individuals with dysphagia. Springer Science+Business Media, Inc., 2007 Swallowing nationallicence Viscosity nationallicence Oral perception nationallicence Oropharyngeal perception nationallicence Age nationallicence Dysphagia nationallicence Deglutition nationallicence Deglutition disorders nationallicence Smith Christina Department of Human Communication Science, University College London, London, England aut Logemann Jeri Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois, USA aut Burghardt Wesley Department of Chemical Engineering, Northwestern University, Evanston, Illinois, USA aut Zecker Steven Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois, USA aut Rademaker Alfred The Robert H. Lurie Comprehensive Cancer Center, Biostatistics Section, Department of Preventative Medicine, Northwestern University Medical School, Chicago, Illinois, USA aut Dysphagia Springer-Verlag 21/4(2006-10-01), 209-217 0179-051X 21:4<209 2006 21 455 https://doi.org/10.1007/s00455-006-9045-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00455-006-9045-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Smith Christina Department of Human Communication Science, University College London, London, England aut NATIONALLICENCE 700 1- Logemann Jeri Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois, USA aut NATIONALLICENCE 700 1- Burghardt Wesley Department of Chemical Engineering, Northwestern University, Evanston, Illinois, USA aut NATIONALLICENCE 700 1- Zecker Steven Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois, USA aut NATIONALLICENCE 700 1- Rademaker Alfred The Robert H. Lurie Comprehensive Cancer Center, Biostatistics Section, Department of Preventative Medicine, Northwestern University Medical School, Chicago, Illinois, USA aut NATIONALLICENCE 773 0- Dysphagia Springer-Verlag 21/4(2006-10-01), 209-217 0179-051X 21:4<209 2006 21 455 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer