Ear Flashcards
Name the nerve which innervates the cranial surface of the auricle.
Great Auricular N. of C2,C3.
Name the arteries that supply the auricle.
Posterior Auricular, Superficial Temporal.
Lymph from the superior half of the cranial surface of the auricle drains into the?
Superior parotid lymph nodes
Name the gland that produces ear wax.
Ceruminous glands.
What is the size in diameter of the tympanic membrane?
1 cm
The tympanic membrane is the partition between the?
External acoustic meatus and tympanic membrane.
Name the shallow central peak of the tympanic membrane.
Umbo
The tympanic membrane faces anterior, inferior and laterally.
True or False?
True
The superior to lateral process of the malleus attachment on the tympanic membrane is called?
Flaccid part (pars flaccid)
The external surface of the tympanic membrane is innervated by the?
Auricular Nerve of vagus and auriculotemporal nerve.
The internal surface of the tympanic membrane is innervated by the?
Tympanic nerve of glossopharyngeal.
Name three features on the medial wall of the tympanic cavity.
Oval window, round window and promontory of the labyrinthine wall.
The space superior to the tympanic membrane in the tympanic cavity is called?
Epitympanic recess.
What indicates the floor of the tympanic cavity?
Jugular wall
Name the arteries that supply the pharyngotympanic tube.
Ascending pharyngeal, middle meningeal, artery of Pterygoid canal of maxillary artery.
The auditory ossicles transmit the sound wave from the _________ to the __________ leading to the vestibule of the bony labyrinth.
Tympanic membrane, oval window.
The ossicles are covered with regular osteogenic periosteum.
True or False.
False
Name the part of the malleus that attaches to the flaccid part of the tympanic membrane.
Neck of the malleus.
Describe the umbo.
Tip of the handle of the malleus.
The lenticular process articulates with?
Head of the stapes.
The tensor tympani inserts into?
Handle of the malleus
The head of the malleus lies in the?
Epitympanic recess.
The base of the stapes is considerably smaller than the tympanic membrane, as a result the vibratory force of the stapes is increased approximately ____ times over that of the tympanic membrane.
10
The auditory ossicles increase the force of the vibrations transmitted from the tympanic membrane.
True or False?
True
The tensor tympani arises from_________, and inserts to the________.
Superior surface of the pharyngotympanic tube, handle of the malleus.
The tensor tympani is innervated by?
Nerve to medial pterygoid.
Name the wall where the pyramidal eminence is for the stapedius muscle emergence.
Posterior wall.
The Otic capsule of the internal ear contains?
Cochlea, vestibule and semicircular canals.
The cochlea is the shell shaped part of the bony labyrinth that contains ___________ for the hearing.
Cochlear duct.
Name the bony core of the cochlea?
Modiolus
The large basal turn of the cochlea produces the _________, which is part of the labyrinthine wall of the tympanic cavity.
Promontory.
Name the communicating feature between the basal turn of the cochlea and the subarachnoid space superior to the jugular foramen.
Cochlear aqueduct.
Name the structure which closes the round window at the basal turn of the cochlea.
Secondary tympanic membrane of the round window.
The vestibule of the bony labyrinth is a small oval chamber that contains the _________ and the __________.
Utricle, Saccule.
Name the feature which communicates the vestibule to the posterior cranial fossa.
Vestibular aqueduct.
No me the feature which transmits the endolymphatic duct.
Vestibular aqueduct.
How many openings from the semicircular canals to the vestibule?
5
The membranous labyrinth is composed of _________ and _______.
Sacs, ducts.
The vestibular labyrinth contains two small communicating sacs that are known as_________ and ________.
Utricle and saccule.
Name the spiral thickening of the periosteal lining of the cochlear canal, which secures the cochlear duct to the spiral canal of the cochlea.
Spiral ligament.
Name the feature where the semicircular ducts open through openings with hair cells.
Ampulla
Name the feature from where the endolymphatic duct arises.
Vestibular aqueduct.
Name the feature which connects the saccule to the cochlear duct, as a uniting duct.
Ductus reuniens.
The primary sensory neurons of the cochlear ampulae are in _________ ganglia! which are in the internal acoustic meatus.
Vestibular
The cochlear duct is a spiral tube, which is firmly suspended across the cochlear canal between the __________ and _________ on the external wall of the cochlear canal and the osseous spiral lamina of the modiolus respectively.
Osseous spiral lamina, spiral ligament.
Name the feature of the semilunar communication at the apex of the cochlea between two perilymph filled spiral canals.
Helicotrema.
Waves of hydroelectric pressure created in the perilymph of the vestibule by the vibration of the base of the stapes ascends to the apex of the cochlea through the?
Scala vestibule.
Waves of hydraulic pressure pass through the apex of the cochlea and then descends back to the basal turn of the cochlea through?
Scala tympani
The receptor organ of auditory stimuli is situated on the?
Basilar membrane.
The receptor organ of auditory stimuli is overlaid by?
Gelatinous tectorial membrane.
Untreated Auricular hematoma might result in ________ or ________.
Cauliflower, boxer’s ear.
How do you pull the helix to observe the adult’s tympanic membrane for the otoscopic examination?
Posterior, superior and laterally
An earache and a bulging red tympanic membrane may indicate a sign of?
Otitis media.
Infection of the mastoid antrum and mastoid cells from a middle ear infection might cause inflammation of the mastoid process known as?
Mastoiditis.
Paralysis of the stapes is associated with excessive acuteness of hearing called __________ or ___________.
Hyperacusis, hyperacusia.
The hyperacusis results from uninhibited movements of the?
Stapes.
Motion sickness results from discordance between _________ and ____________ stimulation.
Visual, vestibular.
