![]() This is not to say we cannot have a virus that affects the inner ear. But ask anyone with Meniere’s and they will tell you that it is not a condition that can be easily dealt with. ![]() The links describe Meniere’s and some treatments available at this time. What happens when they malfunction? Bad things such as Meniere’s Disease, or endolymphatic hydrops, is the most common. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles are actually tiny bones the smallest in the human body. When the fluid levels of the perilymph and endolymph are at an equillibrium, you have regular hearing and balance functioning so you hear well and are not dizzy! How do the hammer anvil and stirrup bones amplify sound into the inner ear The vibrations from the eardrum set the ossicles into motion. The endolymph fluid is the opposite, high in potassium and low in sodium which gives it a positive charge. This is very similar to the cerbrospinal fluid surrounding the brain and spinal column. As I stated earlier, the perilymph fluid is high in sodium and low in potassium with basically a negative charge. The perilymph and endolymph fluids are separated by a membrane called the membranous labyrinth. The second fluid in the inner ear is called the endolymph. Remember this, as it becomes important later. If you recall from high school chemistry or biology (I can’t remember that far back!), there is a sodium/potassium pump that keeps the levels where they should be. The perilymph is high in sodium and lower in potassium. The perilymph fluid fills the space inside the bony labyrinth that surrounds the membranous labyrinth. The inner ear is where some of the most interesting things happen, and they happen in fluid. These lie beyond the middle ear where your little bones are- the malleus, incus and stapes (hammer, anvil and stirrup). The labyrinth consists of the semicircular canals (the balance center) and the cochlea (the hearing center). In the inner ear there is both a bony labyrinth and a membranous labyrinth (the green line on the diagram). The brain processes the information from the ear and lets us distinguish between different types of sounds.Last month when I wrote the Barotrauma blog (which has become one of my most popular this year, thank you), I mentioned that I would write about perilymph. Inside the cochlea, there are hundreds of special cells attached to nerve fibers, which can transmit information to the brain. Tympanostomy (ventilation) tubes are devices placed through a surgically created hole in the eardrum to allow drainage of middle ear effusions and to equalize. The stirrup touches a liquid filled sack and the vibrations travel into the cochlea, which is shaped like a shell. The ear canal 21, eardrum 22, hammer 23, anvil 25 and stirrup 40 with an oval. From the stirrup, the vibrations pass into the inner ear. Such implants are also used when there is damage to the inner ear: in this. pinna - (also called the auricle) the visible part of the outer ear. outer ear canal - the tube through which sound travels to the eardrum. nerves - these carry electro-chemical signals from the inner ear (the cochlea) to the brain. ![]() The anvil passes these vibrations to the stirrup, another small bone which touches the anvil. hammer - (also called the malleus) a tiny bone that passes vibrations from the eardrum to the anvil. The hammer vibrating causes the anvil, the small bone touching the hammer, to vibrate. It passes these vibrations on to the hammer, one of three tiny bones in your ear. ![]() The ear canal channels the waves to your eardrum, a thin, sensitive membrane stretched tightly over the entrance to your middle ear. The inner ear (labyrinth) contains the semicircular canals and vestibule for balance, and the cochlea for hearing. The middle ear connects to the back of the throat by the Eustachian tube. The ossicles are part of the auditory system, and together, they comprise an area no larger than an orange seed. The malleus (hammer) is the outermost bone and the stapes (stirrup) is the innermost. Sound waves enter your outer ear and travel through your ear canal to the middle ear. The bones are called the hammer (malleus), anvil (incus), and stirrup (stapes) to reflect their shapes. The incus sits between the other two bones, known as ossicles, of the middle ear. The human ear has three main sections, which consist of the outer ear, the middle ear, and the inner ear. ![]()
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