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Unit 4 - the pharynx
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Pharyngeal aponeurosis
Back wall of throat
Extends from base of skull to behind the cricoid cartilage of the larynx
Pharyngeal constrictors
Sets of muscles that blend into pharyngeal aponeurosis which constrict or narrow the pharynx
Origin:
lateral areas of the pharynx
Insertion:
medial raphe
Inferior constrictor
thickest and strongest
arises from area of cricoid and thyroid cartilages
overlaps with the middle constrictor
Middle constrictor
originates from area of hyoid and overlaps with superior constrictor
Superior constrictor
weakest of three
arises from area of pterygoid plates
superior most fibers forms a subgroup called prerygophyaryngeus
Salpingopharyngeus
Origin:
bottom of the Eustachian tube, belnding into the palatopharyngeus
Action:
life the pharyngeal wall
Actions to achieve velopharyngeal closiure
Occurs when speaking and swallowing
Velum moves up and back (levator veli palatini)
Posterior pharyngeal wall moves forward to meet the velum (superior contrictor with the pterygopharyneus = Passavant's Pad)
Laterak walls move medially to create a fairly complete seal (superior contrictor)
Author
jadnebalasca
ID
184449
Card Set
Unit 4 - the pharynx
Description
A&P of the ear and speech mech
Updated
11/19/2012, 7:02:36 PM
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