hyoid, cricoid
DESCRIPTION
shows detailed hyoid cricoid anatomyTRANSCRIPT
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East Tennessee State University
Quillen College of Medicine
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Middle ear learning objectives• be able to visualize the location of the middle ear• know the structures within the middle ear cavity, their
arrangement and function• learn the relationship of structures that surround the
middle ear, and understand their significance
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Pharyngeal Arch I(mand. – CN V3, mm of Mast.)Pharyngeal Arch II(hyoid – CN VII, mm of Facial Exp.)
Pharyngeal Arch III(CN IX, stylopharyngeus m.)
Pharyngeal Arch IV/VI(laryng. carts. – CN X, mm of larynx & pharynx)
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Stomodeum (mouth)
Pharyngeal Cleft I(external auditory meatus)
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Cleft 1 (External Auditory Meatus)
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Pharyngeal Pouch 1 (middle ear cavity)
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Pharyngeal Pouch 1 (middle ear cavity)
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Auditory tube
Tympanic memb.
Nasopharynx
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External auditory meatus (Pharyngeal cleft I)
Membrane between Pharyngeal Arch I & Cleft I
Middle ear cavity and eustachian tube(from Pharyngeal pouch I)
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Cone of light
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MalleusChorda tympani
Taste – ant. 2/3 of tonguePSNS – submand./subling. gls.
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Dissection procedures:
2 cuts and a chisel
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CN VII
Geniculate gang.
CN VII
Ch. Tymp.
Gr. Petrosal n.
CN VIII
Internal auditory meatus
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CN VIII
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Malleus
Incus
Stapes
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CN VII
Chord. Tymp.
Tensor tymp. m.
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On a routine visit to your clinic, a 53 year old male patient presented with the following symptoms that sequentially appeared over a nine month period of time.
-ringing (tinnitus) in his right ear that was occasional initially, worsening in frequency and severity over time.
-periodic dizziness.
-episodes of falling without any apparent reason. These occurrences have also increased recently.
-fluids draining out of the right corner of his mouth while drinking.
What is his problem?
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Larynx learning objectives• be able to visualize the location of the larynx• know the “skeletal structures” within the middle larynx,
their arrangement and function• learn the attachments of the laryngeal muscles and their
function• describe the innervation of the laryngeal muscles and
mucosa
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Internal br. of Sup. Lary. br. of CNX
Recurrent Laryn. br. of CNX
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Hyoid
Thyroid
Cricoid
Epiglottis
Arytenoid
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Cricoid
Arytenoid
Muscular process
Vocal process
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Vocal lig.
Cricothyroid memb.
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Vocal fold
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Cricothyroid m. - tense(Ext. Laryn. br. of Sup. Laryn. br. of X)
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Thyroarytenoid m. - relax
Lat. cricoarytenoid m. - adduct
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Transverse arytenoid m. - adduct
Aryepiglottic m. – “close airway”
Post. cricoarytenoid m. - abduct
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A 65 y/o man comes to the clinic with a raspy/hoarse voice. He did not know how long he has had the problem, but feels that it has worsened over the last 3 weeks.
He has not been sick. He has no reported allergies.
He was in the military for 30 years, and was a heavy smoker over that time.
What do you suspect is the source of his problem?
What can you do to help confirm your diagnosis?
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East Tennessee State University
Quillen College of Medicine