Stephens - 6 Flashcards
GERD can destroy R’s important for what?
acid reflux can sneak through the epiglottis and destroy R’s important for the cough reflex innervated by the internal branch of the superior laryngeal n
Why are neonates at an advantage in regards to their larynx?
Their airway and swallowing function are separate, allowing them to suckle and breath simultaneously, neonate larynx has not yet descended to adult level (epiglottis articulates with soft palate)
What innervates and vascularizes the epithelium of the piriform recess?
internal branch of the sup laryngeal n and SVE fibers
superior laryngeal a
What muscle assists folks in speaking after they’ve had a larynectomy?
Vibration of the cricopharyngeus m (an inf constrictor)
What is buccopharyngeal fascia?
Contains the pharyngeal plexus, covers outer surface of buccinator m and pharynx
What is the elevator m of the pharynx?
Stylopharyngeus m
What is the innervation to the pharynx?
Pharyngeal plexus, GVA in by CN 9 and SVE out by CN 10
GVA fibers from 9 convey gag reflex info
What innervation provides GVA and SVA fibers to the post 1/3rd of the tongue?
Glossopharyngeal n
Gag reflex innervation is?
GVA 9 in, SVE 10 out
The cricoid joint is what type of joint?
Synovial
What membrane is punctured for an emergency cricothyrotomy? What must be watched out for?
Cricothyroid membrane
Thyroid gland d/t being highly vascularized
What is the association between they laryngeal cartilage and the hyoid bone?
Thyrohyoid membrane
What is the posterior attachment for the vocal ligaments? Why is it a good attachment?
Arytenoids cartilage on the vocal process
Mobile in rotation and transverse directions
Able to bring cords together or move apart
Paralyzed VCs are next to one another (abducted normally)
What cartilage pinches anteriorly when high pitch is necessary from the voice?
Thyroid cartilage, cricothyroid m ultimately tenses vocal cords
Where level does the anterior arch of the cricoid cartilage roughly sit?
C6
What m abducts the vocal cords? What is it innervated by?
Posterior cricoarytenoid m
Innervated by vagus n
What innervates the cricothyroid m?
External branch of the superior laryngeal n
What are the ant and post connections for the vocal cords?
Ant: thyroid cartilage (immobile)
Post: arytenoid cartilages (vocal processes), mobile
Describe the phases of deglutition (Swallowing).
- Oral phase: mastication (chewing)
- Oropharyngeal phase: elevation of floor of mouth, tongue pushes bolus back to oropharynx, elevation of tongue closes epigottis
- Pharyngo-esophageal phase: oropharynx elevates and propels bolus down esophagus, bolus is split in two over epiglottis and passes through piriform recesses
