Free Cochlea Essays and Papers

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Free Cochlea Essays and Papers

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    The Amazing Ear

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    muscles play a role in how the sound wave is moved from the air-filled ear canal to the fluid-filled cochlea. The Eustachian tube that is connected to the throat also plays an important role. The eardrum plays a huge role in what it does with the sound wave. The eardrum is like a small version of a trampoline on the inside of your ear. On the other side of the eardrum is the fluid-filled cochlea. The eustashian tube helps with equalizing pressure on both sides of the eardrum, which allows the eardrum

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    Hearing Tests

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    tone. The softest sounds you can hear are your hearing thresholds marked on an audiogram. Air conduction Hearing is measured with pure tones through headphones. The sounds go via the air, down the ear canal, through the middle ear, and to the cochlea in the inner ear. The air conduction hearing thresholds are indicated on the audiogram by X for left and 0 for right. Bone conduction Placing a small vibrator on the mastoid bone be... ... middle of paper ... ...rical activity generated

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    Sound

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    into electrical signals that we can understand in our brain. The normal-hearing person already has a way to code acoustic sounds when the inner ear (cochlear) is functioning. The cochlea is the sensory organ that transforms acoustic signals into electrical signals. However, a deaf person does not have a functioning cochlea. The cochlear implant takes over its function. Technically, it is relatively easy to send electrical current through implanted electrodes. The more difficult part is to make the

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    hearing loss is defined as a loss of “30 dB or more in three sequential frequencies in the standard pure tone audiogram within three of fewer days”(Scheiber). The loss occurs when there is damage to either the eighth nerve or the hair cells of the cochlea. Loss is typically unilateral, although in about 5% of cases, bilateral hearing loss has been observed. The average age for the hearing loss is between 50 and 60. There are no sex preferences. The hearing loss can affect all frequencies. Tinnitus

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    Stereocilia

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    hair cells damaged were recorded. They reported that after 10 days the number of hair cells had decreased mainly in the basal and middle part of the cochlea. In birds that lived up to 30 days after the acoustic trauma the hair cell loss was not as severe. Similarly to the 10 day birds the mainly region of damage was located in the middle of the cochlea. Furthermore the percentage of dead/loss hair cells was 70% and 31% in the 10 day and 30 day birds respectively. In birds that were allowed to live

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    1) What is the role of calcium ions during contraction of a skeletal muscle? Calcium is an important element for live. Calcium is found in the bones of animals and humans. In muscle contraction is produce as a result of Calcium ions , Ca2+, It comes from rapid release from the cisternae of the sarcoplasmic reticulum which cause a chemical reaction between ATP and the myofilaments. Another important function of Calcium ions occurs during the state of resting muscle. During the state of resting

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    Outer Hair Cell Function

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    and outer hair cells located on the medial and lateral sides of the tunnel of Corti, which is composed of pillar cells. For humans, there is one row of inner hair cells inside each cochlea numbering approximately 3,500. As for outer hair cells, there are three to five rows and are approximately 12,500 in each cochlea. The inner and outer hair cells are different in their structures, which indicates that their functions will most likely differ as well. Outer hair cells are cylinder-shaped, which

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    The Ear and How It Works

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    The Ear and How It Hears The ear is one of the most important organs of the body. Not only does it serve to keep the body balanced, but most importantly it give us the ability to hear. When a noise is made it makes a sound wave. When the sound wave makes it to the ear it makes its way through the three sections of the ear. The ear is able to pick up sound waves and transfer them into nerve impulses that can be read by the brain. Background: A sound wave is pressure variations in air. Sound waves

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    in the ear that blocks the ear canal. There are three types of deafness, first of all conductive deafness, as it means that the sound can’t pass through the outer and middle ear to send it to the cochlea and auditory nerve, second of all sensori-neural deafness as its caused by a problem in the cochlea, last but not least mixed deafness as it’s a combination of both sensori-neural deafness. Symptoms of deafness as could be difficulty to the person that have deafness to following the conversation

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    Mutations in KCNQ1 Ion Channel May Cause Jervell and Lange-Nielsen Syndrome Abstract Jervell and Lange-Nielsen Syndrome is a human disorder that causes deafness and an irregular heartbeat. It is caused by a mutation in a protein that is a potassium ion channel. The mutations lead to a protein that does not serve the purpose it was designed to serve. It is difficult to treat, but there are things that can be done for both the cardiac and auditory aspects of it. Implantation of a device used

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