Presentation on theme: "Little Mermaid in Little Theatre Wed 6pm/Fri 6pm/ Sat 2pm"— Presentation transcript:
1 Little Mermaid in Little Theatre Wed 6pm/Fri 6pm/ Sat 2pm Sponge: Set up Cornell Notes on pg. 59Topic:12.5: Middle EarEssential Questions:Color code notes and Picture Bubble Map Figure 12.9Tympanic cavityMalleusIncusStapesAuditory TubeOval window12.5: Middle Ear2.1 Atoms, Ions, and MoleculesWant EXTRA CREDIT???Report Card NightTomorrow 5:30-8pmVisit IB Art MallSign inLittle Mermaid in Little TheatreWed 6pm/Fri 6pm/Sat 2pmTake a pic or ticket stub
4 Tympanic cavity air-filled space in temporal bone
5 Middle Ear Auditory ossicles 3 small bones that vibrate in response to ear drumTransmit vibrations between the tympanic membrane and the inner ear1. Tympanic membrane vibrates the malleus2. Malleus (hammer) vibrates the incus3. Incus (anvil) vibrates the stapes4. Stapes (stirrup) vibrates against the oval window5. oval window moves fluids in inner ear which stimulate the hearing receptorsMalleusStapesIncus
7 Middle Ear Tympanic reflex Elicited in about 1/10 of a second following a loud external sound2 small skeletal muscles contract, reducing the effectiveness in transmitting vibrations to the inner earReduces pressure from loud sounds that might otherwise damage the hearing receptorsBUT, it cannot protect hearing receptors from loud sounds which occur rapidlyEx: explosion, gun shot
8 Auditory Tube Auditory Tube aka Eustachian Tube connects middle ear to throatAllows air to pass between the tympanic cavity and the outside of the body by way of the throat and mouthhelps maintain equal pressure on both sides of tympanic membraneNecessary for normal hearingusually closed by valve-like flaps in throat
10 Auditory Tube Noticeable during rapid change in altitude Ex: High to low altitudeAir pressure on outside of tympanic membrane increasesTympanic membrane is pushed inward, impairing hearingAir will force its way up into the middle earThis equalizes the pressure on both sides of the tympanic membrane, moving it back into its rightful positionCauses a “popping” soundSwallowing, yawning, or chewing aid in the opening of the valves and can hasten equalization of air pressure
11 Create Picture Bubble Map Color code to match notesPg. 58
12 12.5: Middle Ear Infections Sponge: Set up Cornell Notes on pg. 61Topic:12.5: Middle Ear InfectionsEssential Questions:What is the major cause of middle ear infections?What are some complications of ear infections?12.5: Middle Ear Infections2.1 Atoms, Ions, and MoleculesWant EXTRA CREDIT???Report Card NightTonight 5:30-8pmVisit IB Art MallSign inLittle Mermaid in Little TheatreFri 6pm/Sat 2pmTake a pic or ticket stub
13 Otitis Media “Ear Infection” Otitis Media aka “Middle ear infection”Fluid builds up in middle earBreeding ground for bacteria, which causes infectionHow? The mucous membranes that line the auditory tubes connect with the linings of the middle ear which creates a conduit for bacteria infecting the throat or nasal passagesGreater in young childrenUsually treated with antibiotics
15 Symptoms Ear Infection Symptoms The main warning sign of infection is sharp ear pain.You may be especially uncomfortable lying down, so you might have a hard time sleeping. Other problems to look for:Trouble hearingFeverFluid oozing from earsDizzinessStuffy nose
16 CausesFluid in the EarIf the Eustachian (auditory) tube gets blocked, fluid builds up inside middle ear.This makes the perfect breeding ground for bacteria and viruses, which can cause infections.Your doctor will look inside your ear with an otoscope, which can blow a puff of air to make his eardrum vibrate. If the eardrum doesn’t vibrate as much as it should, chances are there’s fluid inside.
17 Possible Consequences 1. Bursting an EardrumIf too much fluid or pressure builds up inside your middle ear, the eardrum can actually burst (shown here).If that happens, you may see yellow, brown, or white fluid draining from the ear.Although this sounds scary, the eardrum usually heals itself in a couple of weeks.Unless it happens a lot, your hearing should be fine. The good news is that the pain may suddenly disappear because the hole lets the pressure go
18 2. Hearing LossIf ear infections keep coming back, they can scar his eardrums and lead to hearing loss, speech problems, or even meningitis.If a person suffers from infections often, they might want to have their hearing tested just in case.
19 Treatment Options Antibiotics using antibiotics both topical and oral can provide you relief from earache by fighting the infection, as they stop swelling and itching of the ear.
20 Treatment Options2. Myringotomy- An incision is made in the tympanic membraneTympanostomy tubes aka “ear tubes” are Inserted into affected ears during surgeryForm a small tunnel so ears can drainTubes usually fall out on their ownHopefully the child has outgrown the susceptibility to ear infections*This is only used in cases of chronic ear infections
22 Tonsils Can Be the Cause Sometimes a child’s tonsils get so swollen that they put pressure on the Eustachian tubes connecting her middle ear to her throat -- which then causes infections.If that keeps happening, the tonsils may have to be taken out
23 Use the video and the “All About Ear Infections” reading to add to your Otitis Media Tree-Map DON’T forget to add pictures!I want a FULL Tree-Map
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