Pharynx and Larynx
Terms
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pharynx
- superior boundary - base of occipital bone
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pharynx
- inferior boundary - esophagus and laryxn at ~C6 level
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pharynx
- posterior boundary - retropharyngeal space and the alar fascia
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pharynx
- anterior boundary -
posterior nasal choanae, post 1/3 tong
most inferiorly -- posterior surface of larynx - nasopharynx
- superior region of pharynx, receives posterior opening of nasal cavity and is superior to the soft palate
- oropharynx
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can visualize when looking into a patient's mouth
posterior to oral cavity
inferior to soft palate
superior to epiglottis - laryngopharynx
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inferior region
posterior to larynx
inferior to epiglottis
superior to level of cricoid cartilage / C6 - To which structure do all the pharyngeal contricter M's attach?
- median pharyngeal raphe
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superior pharyngeal constrictor
- origin - pterygoid hamulus, posterior end of mylohyoid line of mandible, and the pterygomandibular raphe
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middle pharyngeal constrictor
- origin - stylohyoid L & greater and lesser horns of the hyoid bone
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inferior pharyngeal constrictor
- origin - oblique line of thyroid cartilage & lateral surface of the cricoid cartilage
- where does all the motor innervation to the pharynx come from? what are the exceptions?
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CN X (Vagus)
exceptions:
stylopharyngeus (CN IX)
tensor palati (V3) - what are the three main fxns of the larynx?
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connects oropharynx with trachea for respiration
serves as valve to protect the airway during swallowing
organ for vocalization - what is special about the cricoid cartilage?
- it is the only complete cartilaginous ring in the respiratory tree
- what provides motor innervation to all intrinsic muscles of the larynx?
- recurrent laryngeal N from CN X (Vagus)
- what provides motor innervation to the lone external muscle of the larynx?
- cricothyroid M -- innervated by external laryngeal N