Pharyngeal Stage

Question 1

Initiation

Answer 1

Bolus contact with area of anterior faucial pillars and posterior surface of the tongue
Other sensory inputs

Question 2

Velopharyngeal seal

Answer 2

Closes system, creates more pressure, prevents nasal regurgitations
Levator veli palatini
Musculus uvulae helps

Question 3

Displacement of hyoid and larynx

Answer 3

Digastric, mylohyoid, geniohyoid, hyoglossus

Hyoid moves out of the way so bolus can move through (anteriorly and superiority)

Question 4

Pharyngeal elevation

Answer 4

And shortening by 1/3

Palatopharygeus

Question 5

Base of tongue

Answer 5

Retracts to posterior pharyngeal wall

Question 6

Reflexive cessation of respiration

Answer 6

Sensory important for pharyngeal phase

Must detect elevation of palate and tongue base pressing on pharyx

Question 7

Pharyngeal stripping wave

Answer 7

Stylopharyngeus and pharyngeal constrictors

Question 8

Epiglottis tipped down

Answer 8

Thyroepiglottic
Bifrication down both sides of pharynx (protective mechanism)
Doesn’t completely close over laryngeal aditus

Question 9

Contraction of intrinsic laryngeal muscles

Answer 9

Vocal folds adducting- thyroarytenoid, transverse arytenoid, lateral cricoarytenoid
False vocal folds close

Question 10

Soft palate pulled down

Answer 10

Approximated to root of tongue by pharyngopalatine muscle and upper pharyngeal constrictors

Question 11

Hypopharyngeal pressure differential

Answer 11

Closed system, with the vallecula, when the UES opens up, the bolus is displaced into a lower pressure area where is UES is

Question 12

UES opening

Answer 12

Cricopharyngeus, sternohyoid, sternothyroid, omohyoid
Inferior constrictors are starting to put pressure the bolus
Bolus moves towards lower pressure