Clinical Anatomy of the Ear Flashcards
What is the pterion?
The thinnest part of the skull (H shaped)
What bones make up the pterion?
Frontal
Temporal
Parietal
Sphenoid
What nerves are contained within the temporal bone?
CN VII
CN VIII
Bones of the anterior cranial fossa?
Frontal
Ethmoid
Sphenoid
Bones of the middle cranial fossa?
Sphenoid
Temporal
Bones of the posterior cranial fossa?
Temporal
Occupital
What bone surround the external acoustic meatus?
Temporal bone
What glands of the ear produce ear wax?
Ceruminous glands
What nerve supplies the helix?
C2,3 spinal nerve
When examining a childs ear, what direction do you pull the pina?
Posterioriferiorly
When examining a adults ear, what direction do you pull the pinna?
Posteriorsuperiorly
What nerve supplies the external surface of the tympanic membrane?
CN V3
What nerve supplies the internal surface of the tympanic membrane?
CN IX
Where does the CN IX give sensory innervation to?
Middle ear cavity Eustachian tube Nasopharynx Oropharynx Tonsils
The eustachian tube connects the _____ to the _____?
Tympanic cavity to the wall of the nasopharynx
Sensory nerve supply to the laryngopharynx?
CN X
What are the three ossicles?
Malleus
Incus
Stapes
What bone is at the opening of the oval window?
Base of stapes
What is the Aditus?
Doorway into mastoid antrum from the epitympanic recess
What does the facial nerve travel through out of the crainum?
Stylomastoid foramen
What nerve supplies the anterior 2/3rds of the tongue?
Chorda Tympani (branch of the facial nerve)
What nerve supplies the parotid and submandibular glands?
Chorda Tympani
What is the Stapedius?
Small bone in the body, reduced stapes movement to protect the internal ear from excessive noise
What does the CN V3 travel through out of the cranium?
Foramen ovale
