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73 Cards in this Set
- Front
- Back
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The ear is divided into 3 parts
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External
Middle Inner |
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The Auricle is AKA?
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Pinna
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The Aurticle CN is?
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CN VII Facial
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The Auricle consists of?
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Skin
Cartilage (elastic) Intrinsic and extrinsic muscles |
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Auricle Blood supply is:
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Posterior auricular (from external carotid)
Anterior Auricular (from superficial temporal) |
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List the sensory innervation of the Auricle from the Cervical Plexus
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Lesser Occipital nerve
Great Auricular Nerve |
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List the sensory innervation of hte Auricle from the Cranial Nerves
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Auriculotemporal nerve (V3)
Facial Nerve Vagus Nerve |
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What is Cauliflower Ear AKA?
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Perichondral Hematoma, Hematoma Auris
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What is the COMMON injury of Cauliflower ear?
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Wrestling
Boxing Rugby |
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What can Cauliflower cause and affect?
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discomfort and affect hearing
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Where does the External Acoustic Meatus extend from?
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extend from concha to typanic membrane
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How long is the External Acoustic Meatus?
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2.5 cm long
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What does the External Acoustic Meatus contain?
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hair and modified sweat glands that makes cerumen (earmax)
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List the main sesnory innervation of External Acoustic Meatus
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V2, (IX) & X
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When doing the Otoscopic Exam what do you need to do as a healthcare provider?
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Pull pinna superiorly and posteriorly to help with otoscopic exam
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The handle of malleus and cone of light is in what part of the ear?
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Typanic Membrane
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Where is the handle of malleus located?
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attachment at umbo
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Where is the Pars flaccida ans Pars tensa specifically located in the tympanic membrane?
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Anterior an dPosterior malleloar folds
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List the sensory innervation of the Tympanic Membrane OUTER surface
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V, VII, X
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List the sensory innervation of the Tympanic Membrane Inner surface
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IX
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Which type of tympanic membrane requires abx when infected?
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Acute purulent otitis media
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What is Tympanostomy/myringotomy?
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Otitis media
COMMON dx in children |
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How is Otitis Media managed?
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tube or grommet placed in tympanic membrane and used to mange chronic otitis media with effusion.
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What is a perforated tympanic membrane?
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"Burst eardrum"
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What is the burst eardrum often caused by?
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sports injury
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What clinical findings of a burst eardrum?
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Opens the middle eat to external ear , which is potential for infection high and (hearing loss)
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Where is the Middle ear located?
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temporal bone
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Which part of the ear is the ossicles located?
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Middle ear
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List the two parts of the middle ear
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Tympanic cavity
Epitympanic recess |
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The Middle ear communicated with the nasopharynx via?
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Pharyngotympanic tube
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List the Adjacent stuctures found in the Middle ear
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Facial nerve in facial canal
Jugular bulb in jugular foramen Internal carotid artery in carotid canal |
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List the walls of the Middle Ear
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Tegmental Wall
Jugular Wall Membranous Wall |
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Where is the Tegmental wall specifically located? (roof, floor, lateral)?
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Roof
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Where is the Jugular wall specifically located? (roof, floor, lateral)?
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Floor
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Where is the Membranous wall specifically located? (roof, floor, lateral)?
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Lateral
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What does the tegmental wall separate?
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tiny bony wall separate middle ear from middle cranial fossa
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What does the jugular wall separate?
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Thin bony wall separate middle ear from internal jugular vein
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What does the jugular wall contain?
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typanic caliculus
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What does the membranous wall consists of?
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tympanic membrane
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What does the Anterior wall of teh middle ear separate?
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Lower thin wall separate middle ear from internal carotid artery in carotic canal
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What does the Anterior Wall of the Middle Ear contain?
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Opening of canal of tensor tympani muscle
Entrance of pharyngotympanic tube Foramen for exist of the chorda tympani Foramen for exit of lesser petrosal nerve |
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What does the Labyrinthine (medial wall) separate of the Middle Ear separate?
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middle and inner ear
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What does the labyrinthine contain?
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Promontory formed by basal turn of cochlea
Oval window to which foot of stapes is attached Rpund window Prominence of facial canal Prominence of lateral semicircular canal |
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What does te Matoid (posterior) wall separate?
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between middle ear and mastoid air cells
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Mastid wall is continuous with what opening?
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continuous with the aditus (opening) to mastoid air cells
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What does the Mastoid wall contain?
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Pyramindal eminence (stapedius tendon)
Opening for chorda tympani entering the ear |
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List the parts of the Auditory Ossicles
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Malleus
Incus Stapes |
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If a surgical incision is needed to be made in the tympanic membrane where should it be made?
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Posterior inferior quadrant
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What is the Purpose of the Middle Ear?
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Transmission of Sound Wave
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The Transmission of Sounds is Attenuated by what muscles?
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TEnsor tympani
Stapedius |
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Where does the tensor tympani attach to?
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Tensor tympani
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Where does the Stapedius attach to?
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Stapes
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What nerve supples to the Tensor tympani?
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Supplied by nerve to the medial ptergoid (branch V3)
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What nerve supples to Stapedius?
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CN VII
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Where in the ear can equilbration of Pressure build up?
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Middle ear (change of air on airplane)
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How can equilbration of pressure be relieved?
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nasal or oral cavity (yawning; chewing)
though pharyngotympanic tube (aka auditory tube; Eustachian tube) |
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Which muscles of the pharynx and soft palate have attachments to the pharyngotympanic tube?
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Tensor palatine
Lavator palatine |
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Blockage of the pharyngotympanic tube (aka auditory tube; Eustachian tube) can be caused by what?
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illness (colds, allergies) or developmentallly
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In children, why do they have more ear infections?
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pharyngotympanic tube (aka auditory tube; Eustachian tube) is SMALLER and more hortizontal in children
Result can be recurrent otitis media |
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Where is the inner ear located?
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entirely w/in the petrous part of teh temporal bone
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What structures are found in the inner ear?
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bony labyrinth
Membranous labyrinth |
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Which structures in the inner ear is associated with fluid and changes in fluid movement?
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bony labyrinth adn membranous labyrinth
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What does the bony labyrinth consists of?
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vastibule
cochlea semicircular canals (contains membransous labyrinth) |
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What is the bony labyrinth lined with?
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periostium
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What is the bony labyrinth filled with?
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perilymph (fluid)
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What does the Membranous labyrinth consists of?
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Semicircular ducts (anterior, posterior, lateral)
Cochlear duct Utricle Saccule |
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What is the mebranous labrinth filled with?
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Endolymph
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Which organ deals with hearing?
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Cochlea
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Which is the organ for balance?
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Vesticular apparatus
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** TQ What are the ducts of the vesticular apparatus?
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Anterior semicircular duct
Posterior semicircular duct Lateral semicircular duct |
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What part of each emicirular ducts detect direction of movement?
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Crista
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Waht does the Utricle (part of the Vesticular Apparatus detect?
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Macular detects centrifugal and vertical acceleration
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Waht does the Saccule (part of the Vesticbular apparatus detect?
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Macular detects linear acceleration
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