The Importance Of Hearing

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The other day, I was thinking about how amazing it is to be able to perceive the world around me. I understood that from the retina to the brain, perception goes from complex to extremely complex. In other words, being able to experience the real world is one of the marvelous opportunities that we have. This phenomenon starts with light getting in contact with the cornea continuing to the back of the eyes, to the retina, before light goes to the optic nerve and end up in the brain. This process appears to be simple; nevertheless, each little section of the eyes plays a huge role in perception and become indispensable for accurate vision. For example, in the retina alone, rods and cones play a big role in perception. There are two types of photoreceptors in the human retina, rods and cones. Rods are responsible for vision at low light level and cones activate when light reaches a higher level. Rods do not mediate color vision; …show more content…
Sound is the vibration of objects. We perceive sound as the ear drums move from the sound pressure. Then, this vibration is transformed into electrical impulses, which are sent to the brain. The transformation of the electrical impulse occurs inside the outer, the middle and the inner parts of the ears. The outer ear is called the external sound-gathering part of the ear. Its function is to gather sound energy and focuses it on the eardrum. The middle ear, an air-filled chamber serves as an amplifier of vibration. The inner ear is where the cochlea is located and also where we perceive sound. While cochlea plays an important part in hearing perception, how sounds move from there to the brain is even more complicated. The vibration of the membrane moves the hair, which sends signals to the roots, the spiral ganglia, the cranial nerve and then the brain. These impulses, when interpreted by our brain, lead to

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