CGSC376 Lecture Notes - Lecture 8: Soft Palate, Inferior Pharyngeal Constrictor Muscle, Neurotypical

• School: University of Delaware
• Department: Cognitive Science
• Course: CGSC376
• Professor: Straitman Nina

Document Summary

Oral-motor sensation: awareness and sensitivity to taste, temperature, texture of liquids, and semi-solids/solids. Oral-motor movements/functions: strength of coordination of muscle movements. Goal: move the bolus in stages to the esophagus. Oral preparatory phase: acquire and organize the liquid, semi-solid or solid soft palate lowers to contain the bolus until ready saliva breaks down substance & lubricates mastication/chewing if needed. Oral phase: tongue strips material and compresses via buccal muscles, tongue moves the bolus to the rear of the oral cavity. Reflex--- posterior pharyngeal wall & back of tongue press. Pressure squeezes the bolus toward entrance to esophagus cricopharyngeus opens passage to esophagus. Larynx moves forward and up to protect airway. Automatic: pharyngeal constrictors . superior, middle and inferior. Neurotypical infant swallow: suck-swallow-breathe, in that order. Breathing too rapid/timing inefficient - no time to successfully acquire and swallow. Immediate consequence- liquid pools behind tongue (valleculae) and spills into airway. Long-term consequence - failure to thrive (gain weight and grow)