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located in triangular interval b/w palatoglossal arch and palatopharyngeal arch

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rounded lateral aspect: fibrous capsule

separated from pharyngeal wall by layer of loose areolar tissue

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inferior pole: continuous with lymphoid tissue of tongue—lingual tonsil

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crypts extend form free surface to capsule

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bed of tonsil:

thin fibrous sheet covers bed

part of pharyngobasilar fascia

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under fascia: palatopharyngeus and superior constrictor

part of pharynx muscular coat

superior constrictor:

free, arched inferior border that does not reach inferior 1/3 of tonsilar bed

origin: pterygomandibular raphe

o

raphe/ligament—connects hamulus of medial pterygoid plate and mandible (posterior to 3rd molar tooth)

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two muscles meet: buccinator and superior constrictor

above superior border:

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auditory tube

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levator palate

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ascending pharyngeal artery

paratonsillar veinhemorrhage during tonsillectomy

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anterior to palatopharyngeus: styloglossus and glossopharyngeal nerve

styloglossus

thick muscular band

from tip of styloid process to lateral aspect of tongue

glossopharyngeal nerve

sensory to area of palatine tonsil

passes thru gap b/w superior and middle constrictors, lateral to stylopharyngeus

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under palatoglossal archpalatoglossus

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under palatopharyngeal archpalatopharyngeus

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palatopharyngeus, salpingopharyngeus and stylopharyngeuslongitudinal musculature of pharynx

palatopharyngeus

attaches to posterior border of thyroid cartilage

blends with lateral pharynx and esophagus

salpingopharyngeus: descends from inferior part of auditory tube (salpinx) and blends with palatopharyngeus

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auditory tube

connects nasopharynx with tympanic cavity

cartilaginous and bony portion

anterior 2/3: cartilage

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superior and medial walls of tube

inferior and lateral wall: membranous

two portions meet at isthmuslumen is very narrow

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external ear canal and middle ear cavity: separated by tympanic membrane

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levator veli palatine/levator palati

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arises from petrous bone and medial portion of cartilage of auditory tube

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elevates and retracts soft palate

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tensor veli palatine (tensor palati)

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arises from scaphoid fossa: posterior border of medial pterygoid plate

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hamulus of medial pterygoid plate: pulley for tensor palati tendon

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both tensors must pull laterally to tense

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under musclemandibular nerve from foramen ovale

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