Pharynx/Larynx Flashcards
pharynx extends from:
cranial base to C6
lateral attachments of pharynx
part 1 at posterior edge of medial ptergyoid plate, part 2 at inferior portion of stylohyoid ligament, and part 3 at thyroid cartilage
buccopharyngeal fascia
thin layer surrounding outside of pharynx and is a component of pretracheal fascia
pharyngobasilar fascia
much thicker layer lining internal surface and found between cranial base and superior constrictor muscle
constrictor muscle innervation:
vagus
palatopharyngeal sphincter
special band of muscle blending with superior constrictor fibers
cricopharyngeus
part of inferior constrictor muscle
longitudinal muscle innervation:
vagus nerve except for sylopharyngeus which is by glossopharyngeal nerve
valleculae
pair of mucosal pouches in laryngopharynx between median and lateral glossopepiglottic folds
arterial supply to upper pharynx:
branches of ECA: ascending pharyngeal, ascending palatine and tonsillar branches of facial, and numerous branches of lingual and maxillary
arterial supply to lower pharynx:
pharyngeal branches from inferior thyroid artery of thyrocervical trunk from subclavian artery
venous drainage of pharynx:
superiorly to pterygoid plexus or inferiorly to facial and internal jugular veins
lymph drainage of pharynx
to deep cervical nodes
tonsils drain to:
deep cervical nodes, primarily the jugulodigastric nodes
what nerve is vulnerable to injury during tonsillectomy?
glossopharyngeal nerve
adenoiditis
inflammation of pharyngeal tonsils
otitis media
infection of middle ear caused by spread of adenoiditis
pharyngeal plexus
formed by branches of vagus and glossopharyngeal nerves; privides motor and most sensory to the pharynx
pharyngeal branch of vagus nerve:
motor to pharynx and sensory to laryngopharynx
glossopharyngeal nerve:
motor to stylopharyngus and sensory to oropharynx
sensory to nasopharynx from:
pharyngeal branch of maxillary nerve
larynx is in anterior neck at vertebral level:
C3-C6
unpaired laryngeal cartilages:
cricoid, thryoid, and epiglottis