Chapter 8 Part 2 Flashcards
What are the 3 functions of the larynx?
protection
Pressure/lifting
phonation.
What can the loss of the protective larynx lead to?
Pulmonary disease, aspiration
The normal swallowing mechanism depends on rapid neuromuscular coordination of (3)…
Oral cavity, pharynx, larynx
What happens if swallowing is not synchronized?
nasal reflux, choking, aspiration and regurgitation.
Facial muscles help impound food
Forms bolus
Bolus is held against the center of the palate.
Oral preparatory phase
Is the oral preparatory phase voluntary or involuntary?
Voluntary
What is depressed during the oral prep phase?
Velum
The tongue moves upward and backward propelling the bolus in the pharynx.
Oral transit stage
Is the oral transit stage voluntary or involuntary?
Both
Respiration stops and is protected Velum elevates Larynx elevates Lower esophageal sphincter opens Pharyngeal peristalsis moves bolus to esophagus
Pharyngeal phase
Involves active peristalsis from the top to the bottom.
Esophageal stage
When does the esophageal phase start?
bolus is in the esophagus; sphincter is closed
When does the esophageal phase end?
bolus passes the lower esophageal sphincter
What 2 factors make the bolus go down the esophagus?
Pressure and muscle contraction
As bolus moves down, airway is protected, ___ to ___ (true vocal folds, false vocal folds, epiglottis)
Inferior, superior
