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46 Cards in this Set
- Front
- Back
What are the 2 parts of the external ear?
N (93) |
1) Auricle
2) External Acoustic (auditory) Meatus (Ear Canal) |
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What are the 3 parts of the auricle?
N (930 |
1) Concha
2) Helix 3) Tragus |
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Auricle:
1) Blood Supply by what 2 arts? 2) Nerve supply by what 2 nerves? |
1) Superficial Temporal
*Posterior Auricular 2) Great Auricular *Auriculotemporal |
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The External Auditory Meatus (Ear Canal) begins @ (A) and ends @ (B).
N (92) |
A) Auricle
B) Tympanic Membrae |
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1) Is the auditory meatus straight?
2) How can it be straightened? |
1) No
2) By pulling the auricle upward and backwards |
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1) The external auditory meatus is lined with what glands?
2) Where are these glands? 3) What do they produce? |
1) Ceruminous glands
2) Outer 1/3 of external acoustic meatus 3) Cerumen (Ear Wax) |
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What is the other name for the middle ear?
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Tympanic Cavity
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What separates the middle ear from the external acoustic meatus?
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Tympanic Membrane
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1) The middle ear is separated into what two spaces? - Where are these located?
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1) Tympanic Cavity - Medial to tympanic membrane
* Epitympanic Recess - Extends above tympanic Cavity |
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The middle ear cavity communicates with what 2 structures?
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1) Mastoid Air Cells
2) Pharynx |
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The middle ear is innervated by what plexus? - mostly what nerve?
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Tympanic Plexus - Glossopharyngeal
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What forms the: N (92)
1) Roof of the Middle ear? A) Separates middle ear from what? 2) Floor of Middle Ear? A) Separates middle ear cavity from what? |
1) Tegmen Tympani
A) Middle Cranial Fossa 2) Thin Bone A) Superior bulb of Int. Jug. Vein |
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1) What forms lateral wall of middle ear?
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1) Tympanic Membrane (Eardrum)
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Tympanic Membrane:
1) Outer surface innervated by what? 2) Posteroinferior part partially innervated by what? 3) Inner surface innervated by what?: |
1) Auriculotemporal Nerve
2) Vaus 3) Tympanic Plexus - Mostly Glossopharyngeal |
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Tympanic Membrane:
1) Oriented in what 3 directions? 2) What is the apex of its depression called? 3) What causes this? |
1) Anteriorly, Inferiorly, Laterally
2) Umbo 3) Handle of Malleus |
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Tympanic Membrane: N (93)
1) Upper part is called what? 2) The rest is called what? |
1) Flaccid part (pars flaccida)
2) Tense part (pars tensa) |
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Tympanic Membrane:
When examined with an otoscope, a bright reflexion radiates from the umbo, what is this reflection called? |
Cone of Light
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Medial Wall of Middle Ear (Tympanic Cavity):
1) Formed by what? 2) Contains a bulge formed by the basal coil of cochlea is called what? |
1) Bone that separates middle ear cavity from inner ear
2) Promontory |
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Medial Wall of Middle Ear (Tympanic Cavity):
1) What lies above and posterior to the promontory? 2) What lies below and posterior to the promontory? |
1) Oval Window (Fenestra Vestibuli)
2) Round Window (Fenestra Cochlae) |
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Medial Wall of Middle Ear (Tympanic Cavity):
1) Above and posterior to the oval window is what? 2) Above the prominence of the canal of the facial nerve is what? |
1) Prominence of the canal of the facial nerve
2) Prominence of lateral semicircular canal |
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Medial Wall of Middle Ear (Tympanic Cavity):
1) What are structures are anteriorl? |
1) Cochleariform Process
2) Semicanal for the Tensory Tympani |
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Anterior Wall of Middle Ear (Tympanic Cavity):
1) Also called what? 2) Separates the middle ear cavity from what? |
1) Carotid Wall
2) Internal Carotid Artery |
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Anterior Wall of Middle Ear (Tympanic Cavity):
1) Contains an opening for what? 2) Above this opening is another opening for what? - that contains what? 3) There is also another small opening through which, which nerve passes? |
1) Auditory (Pharyngotympanic) Tube
2) Semicanal - Tensory Tympani 3) Chorda Tympani Nerve |
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Posterior Wall of Middle Ear (Tympanic Cavity):
1) Formed by bone that separates teh middle ear from what? 2) What is the chamber that allows communication to the mastoid air cells? |
1) Mastoid Air Cells
2) Mastoid Antrum |
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Posterior Wall of Middle Ear (Tympanic Cavity):
1) Below the aditus is a small conical projection called what? 2) This structure houses what? |
1) Pyramid
2) Stapedius |
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The facial nerve courses in the bone of the posterior wall, where it gives off what 2 nerves?
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1) Nerve to Stapedius
2) Chorda Tympani |
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What are the auditory ossicles?
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The bones of the middle ear
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1) The auditory ossicles transmit what to the tympanic membrane?
2) They articulate with eachother via what type of joints? |
1) Vibrations
2) Synovial |
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Auditory Ossicles: Malleus
N (92-93) 1) 3 Parts? - Where are they? 2) What are they attached to (3)? 3) What nerve courses on the medial surface of the handle? |
1) Head - Epitympanic Recess
Neck Handle - Manubrium 2) Tympanic Membrane Lat / Ant Processes 3) Chorda Tympani |
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Auditory Ossicles: Incus
Gray's 910 1) Its body articulates with what? 2) It has a long process that projects in what direction? 3) The lower end of the long process bends medially, forming what? |
1) Head of malleus
2) Downward 3) Lenticular Process |
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Auditory Ossicles: Stapes
Gray's 910 1) The base of the stapes is what shape? 2) Where does it fit into? |
1) Oval
2) The oval window |
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What are the 2 muscles of the inner ear?
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1) Tensor Tympani
2) Stapedius |
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Tensory Tympani:
1) Its tendon inserts on what? 2) Innervated by what? 3) Action? |
1) Handle of the malleus
2) Mandibular Nerve 3) Pulls manubrium medially |
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Stapedius:
1) Its tendon inserts on whhat?2) Innervated by what nerve? 3) Action? |
1) Neck of stapes
2) Facial Nerve 3) Pulls stapes posteriorly --> tilts its base --> dampened oscillations |
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1) The tympanic nerve is a branch of what nerve?
2) What type of fibers does it carry? 3) Forms what plexus? |
1) Glossopharyngeal
2) Preganglionic Parasympathetic Fibers 3) Tympanic Plexus |
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1) What tympanic plexus is sensory to mucosa of middle ear, including what?
2) Pregangionlic Parasympathetic fibers leave teh Tympanic Plexus to form what? |
1) Tympanic Membrane
2) Lesser petrosal nerve |
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Name 3 branches of the facial nerve?
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1) Greater Petrosal Nerve (@ Geniculate Ganglion)
2) Branch to Stapedius 3) Chorda Tympani |
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Inner Ear:
1) What are the complicated series of spaces inside the petrous part of teh temporal bone? 2) In the bony labyrinth their are fluid filled sacs - what are they called? |
1) Bony Labyrinth
2) Membranous Labyrinth |
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Inner Ear:
1) Within these spaces are which 2 organs - What are they for? |
1) Cocheal - Hearing
2) Vestibular Apparatus - Equilibrium |
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N (95)
1) What is the spiral bony core of the inner ear? 2) The (A) begins @ the oval window, spirals, then passes through a channel called the (B) |
1) Modiolus
2 A) Scala Vestibuli B) Helicotrema |
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Inner Ear:
1) The helicotrema becomes continuous with what? 2) Where does this terminate? |
1) Scala Tympani
2) Round Window |
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Inner Ear:
1) Spaces are filled with what? 2) What keeps this in place? |
1) Perilymph
2) Footplate of stapes Secondary tympanic membrane |
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Inner Ear:
1) What is b/t the scala vestibuli and scala tympani? 2) The cochlear duct is filled with what? 3) What does it contain? |
1) Cochlear Duct (Scala Media)
2) Endolymph 3) Spiral Organ of Corti |
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What is the organ for hearing?
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Spiral organ of Corti
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The vestibular organ consists of 2 sets of fluid filled chambers:
1st part: consists of what 2 sacs? 2nd part: consists of what? |
1) Utricle
Saccule 2) 3 semicircular canals |
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Anat II
Unit 4 Lecture 8 Ear |
Anat II
Unit 4 Lecture 8 Ear |