Chapter 13 Part 2 Flashcards
How long does the oral transit stage last?
1 second
When does the oral transit phase begin?
When mastication ends
Phase of swallowing where tongue forms ramp and moves bolus from the oral cavity to the pharyngeal cavity; labial seal and nasal breathing is maintained
Oral transit
What CN helps to retract the tongue and helps to form the tongue into ramp to move the bolus posteriorly?
V
What tongue muscles does CN V control?
Digastric, mylohyoid
What CN is responsible for controlling most of the intrinsic and extrinsic tongue muscles, and innervates tongue to squeeze bolus from the anterior part of the mouth to the posterior part of the mouth?
XII
Is the pharyngeal phase voluntary or involuntary?
Involuntary
How long does the pharyngeal phase last?
1 second
When does the pharyngeal phase start?
Bolus contacts faucial arches?
Swallowing phase when the velum closes, larynx raises and closes, breathing ceases, soft palate elevates, cricopharyngeus relaxes
Pharyngeal phase
Crucial in keeping food/liquid out of nasal cavity
Soft palate (velum) closure
How many pairs of faucial pillars do we have?
2
What cranial nerves are involved in soft palate/velar movement?
V, X, XI
What are some things you want to see when you view someone’s velum?
Pink/red color, symmetry
What tasks would you tell your client to do when you view their velum?
Stick your tongue out, say “ah”, symmetrical movement
What happens when you say the consonants m, n?
Nasality, air goes out through nose
What are the 3 valves that close to protect the airway from the bolus entering it?
Epiglottis, true vocal cords, false vocal cords
Muscles that contract during the pharyngeal phase that raise the larynx under the closing epiglottis and further seal off the airway, protecting it from the bolus
Suprahyoid muscles
What 2 cranial nerves control the superior, middle, and inferior pharyngeal constrictor and account for the squeezing sensation we feel in the throat during the pharyngeal swallow?
X, XI
