The influence of bolus volume and viscosity on anterior lingual force during the oral stage of swallowing |
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Authors: | Jeri L Miller MS CCC-SLP Kenneth L Watkin PhD |
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Institution: | (1) School of Communication Sciences and Disorders, McGill University, Montreal, Quebec, Canada;(2) Department of Biomedical Engineering, McGill University, Montreal, Quebec, Canada;(3) Department of Obstetrics and Gynecology, Women's Pavilion Room F5.31, Royal Victoria Hospital, 687 Pine Avenue West, H3A 1A1 Montreal, Quebec, Canada |
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Abstract: | The influence of bolus volume and viscosity on the distribution of anterior lingual force during the oral stage of swallowing was investigated using a new force transducer technology. The maximum force amplitudes from 5 normal adults were measured simultaneously at the mid-anterior, right, and left lateral tongue margins during 10 volitional swallows of 5-, 10-, and 20-ml volumes of water, applesauce, and pudding. Results indicated significant increases in peak force amplitude as viscosity increased. Volume did not significantly influence maximum lingual force amplitudes. Individual subjects demonstrated consistent patterns of asymmetrical force distribution across the lingual margins tested. The results suggest that bolus-specific properties influence the mechanics of oral stage lingual swallowing. This finding has important clinical implications in the assessment and treatment of dysphagic individuals. |
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Keywords: | Dysphagia Bolus volume Bolus viscosity Tongue pressure Bolus transport Deglutition Deglutition disorders |
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