Anatomy: The Ear Flashcards
What is the pterion?
an H shaped suture on the lateral aspect of the skull
What are the two parts of the temporal bone?
The petrous and squamous part
The petrous part of the temporal bone contains what three important structures.
the organs of hearing and balance
the facial nerve
the vestibulocochlear nerve
What type of cartilage is in the external ear
elastic
What glands are contained within the ear canal and produce wax
ceruminous glands
What nerve supplies (sensory) the superior part of the EAM and most of the tympanic membrane
V3
What nerve supplies (sensory) to the inferior part of the EAM and tympanic membrane
vagus
What is the name of the thin part of the tympanic membrane superiorly?
Pars flaccida (superiorly)
What is the most inwardly depressed part of the tympanic membrane?
the umbo
What is the name of the thick part of the tympanic membrane
the pars tensa (posteroinferiorly)
Where is the cone of light normally directed in an otoscopic examination
anteroinferiorly
What supplies the sensory nerve supply to the external surface of the tympanic membrane
V3 (auriculotemporal branch of the trigeminal nerve)
what gives the sensory nerve supply to the internal surface of the tympanic membrane
glossopharyngeal nerve
What supplies the middle ear, eustachian tube, nasopharynx, oropharynx and tonsils with sensory innervation
glossopharyngeal (IX)
What tonsil is in the roof of the nasopharynx
pharyngeal