Pharynx Flashcards
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Flashcards

Layers of the Pharynx

  1. Mucosa
  2. Pharyngobasilar Fascia
  3. Muscular layer
  4. Buccopharyngeal fascia

Pharyngobasilar fascia

Thick fascia that covers any gaps between the pharyngeal muscles and connects the pharynx to the base of the skull at the top

Buccopharyngeal fascia

Back of the pre-tracheal fascia --> helps reduce friction between the throat and other structures thus aiding in movements of the pharynx/swallowing. Contains the pharyngeal plexus which has branches from CN IX and X

Through what space does CN IX enter the oral cavity?

Through the oropharyngeal triangle

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Oral phase

  • Soft palate elevates to prevent bolus from entering nasopharynx
  • Seal is formed with the palatopharyngeal sphincter (Passavant's ridge)
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Pharyngeal phase

  • Breathing stops
  • Pharynx elevates by inner longitudinal muscles
  • Constrictor muscles move food towards esophagus
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What is the name of the specialized part of the inferior constrictor muscle that is considered the UES?

Cricopharyngeus muscle

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What is the afferent limb of the gag reflex? Efferent?

Afferent: CN XI Efferent: CN X

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Piriform recess

Space on either side of the laryngeal inlet that food must travel through to enter esophagus

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What gives us that feeling that something is caught in the throat?

Sensory fibers of CN X

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Where are pharyngeal (adenoid) tonsils located?

Roof of nasopharynx

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Where are tubal tonsils located?

Near the opening of the auditory tube in the nasopharynx

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Where are palatine tonsils located?

Between the palatoglossal and palatopharyngeal folds

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Where are lingual tonsils located?

Pharyngeal tongue mucosa

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The palatopharyngeus and salpingopharyngeus receive motor innervation from what cranial nerve?

CN X

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The stylopharyngeus receives motor innervation by which cranial nerve?

CN IX

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