![]() Benign paroxysmal positional vertigo (BPPV): This condition is also known as positional vertigo.If the tumor begins to cause problems, radiation and surgical removal of the tumor may be recommended. Since these tumors are usually slow-growing and don’t spread to other organs, your healthcare provider may just monitor its growth and your symptoms. In some cases, the tumor may grow large enough that it puts pressure on the nerve and causes symptoms like dizziness, hearing loss, balance problems, or tinnitus (ringing in the ear). Acoustic neuroma: An acoustic neuroma is a slow-growing, noncancerous tumor that forms on the nerve that runs from the inner ear to the brain.For example, it is responsible for sensing if you are standing up straight or upside-down Vestibule: The main function of the vestibule is to detect changes in gravity and up-and-down movement.As fluid shifts through the canals with movement of the head, these tiny hairs send messages to the brain through the seventh cranial nerve Each canal contains fluid and tiny hairs. The second canal senses side-to-side movements, and the third canal signals to the brain when the head is tilted. The first canal is responsible for sensing up-and-down movement. Semicircular canals: The semicircular canals are a three-loop system that uses the shifting of fluid to give the brain information about balance, motion, and how the head is positioned relative to surroundings.Cilia move as sound waves pass through the fluid in the cochlea, and this movement is translated into an electric impulse that is passed from the inner ear to the brain through the eighth cranial nerve This is the portion of the cochlea that is lined with tiny hairs called cilia. It is made up of several layers, with the Organ of Corti at the center. Cochlea: The cochlea is responsible for hearing.It is separated from the middle ear by the oval window, and communicates anteriorly with the cochlea and posteriorly with the semicircular canals Vestibule: The vestibule is the central part of the bony labyrinth.The size of the canals is difficult to measure since they are surrounded by bone They also contain small calcium crystals and tiny hairs that sense the movement of the fluid. Like the cochlea, these canals are filled with fluid. There are three of them, and they line up at 90-degree angles to one another, which allows the the brain to know which direction the head is moving. Semicircular canals: Also known as the labyrinthine, the semicircular canals rest on top of the cochlea, connected by the vestibule. ![]() If it could be uncoiled, the cochlea would be about 30 millimeters long. The cochlea is about 9 millimeters wide at its widest point, and about 5 millimeters tall. The chambers are full of fluid, which vibrates when sound comes in and causes the 30,000 tiny hairs lining the membrane to vibrate and send electrical impulses (sound signals) to the brain. Cochlea: The cochlea is made of a hollow bone shaped like a snail and divided into two chambers by a membrane. ![]()
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