does the outer ear have nerves?
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The lateral surface of the tympanic membrane, the external auditory canal, and the external acoustic meatus are all innervated by nervus intermedius (a branch of CN VII), the auriculotemporal nerve (CN V3), and the auricular branch of the vagus nerve.
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Ear Hurts to Touch. If your ear hurts to touch, you may have an outer ear infection (otitis externa). This infection of the outer ear and the ear canal is caused by bacteria or fungi that thrive in the moist, dark environment of the ear.
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You may also not be able to hear as well or only hear muffled sounds. Usually, the water drains out on its own. If it doesn't, the trapped water may lead to an ear infection. This type of ear infection in the external auditory canal of your outer ear is called swimmer's ear.
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The peripheral hearing system consists of three parts which are the outer ear, the middle ear and the inner ear: The outer ear consists of the pinna (also called the auricle), ear canal and eardrum.
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In summary then, anatomically, the ear consists of a sound conducting mechanism and a sound transducing mechanism. The sound conducting mechanism has two parts, the outer ear consisting of the pinna and ear canal, and the middle ear consisting of the tympanic membrane.
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It's also known as the pinna or auricle. The outer ear's shape helps to collect sound and direct it inside the head toward the middle and inner ears. Along the way, the shape of the ear helps to amplify the sound — or increase its volume — and determine where it's coming from.
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In frogs and toads, the tympanum is a large external oval shape membrane made up of nonglandular skin. It is located just behind the eye. It does not process sound waves; it simply transmits them to the inner parts of the amphibian's ear, which is protected from the entry of water and other foreign objects.
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Early symptoms include hearing loss, ringing in the ear (tinnitus), and dizziness. Sometimes mild to moderate pain is felt behind and slightly above the ear. Paradoxically, smaller tumors are more prone to produce pain in this location compared to large tumors. As noted above, acoustic neuromas are relatively rare.
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Muscle Tension or Jaw Problems If those areas become inflamed due to excess pressure, the sensory nerves that connect to the ear may become inflamed also, and ear problems may result. In these cases, pain may extend beyond the ear into the neck or jaw.
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Hair cells are the receptive cells of the inner ear. ... In humans, outer hair cells are more numerous (approx. 12,000) than inner hair cells (approx 3500). The "hairs" on these cells project toward the inside of the cochlear duct and are embedded in a covering membrane (the tectorial membrane).
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The three sections are known as; the inner ear, the middle ear, the outer ear. The inner ear is made up of the cochlea, the auditory nerve and the brain. The middle ear consists of the middle ear bones called the ossicles (malleus, incus, stapes). The outer ear includes the pinna, the ear canal and the eardrum.
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The jaw joint is very close to the ear, and the nerves supplying both are interconnected…so it's not uncommon to find patients who have molar teeth removed to later experience ear pain, ringing in the ears, a feeling of fullness in the ears, in addition to other symptoms.
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Neurons of the auditory or vestibulocochlear nerve (the eighth cranial nerve) innervate cochlear and vestibular hair cells. ... Inner hair cell nerve fibers are also very heavily myelinated, which is in contrast to the unmyelinated outer hair cell nerve fibers.
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The human cochlea contains on the order of 3,500 inner hair cells and 12,000 outer hair cells at birth. The outer hair cells mechanically amplify low-level sound that enters the cochlea. The amplification may be powered by the movement of their hair bundles, or by an electrically driven motility of their cell bodies.
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Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
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The semicircular canals are solid bone. Cranial nerve VI is the vestibulocochlear nerve. The inner ear bones transmit sound by vibration. The semicircular canals aid with balance.
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The ossicles transmit mechanical vibrations of the tympanic membrane across this chain to the oval window where fluids of the inner ear will move and excite receptors. This process allows sound to be transformed into electrical signals which are then sent to the brain.