Papilloma external ear canal

Hearing Loss papilloma external ear canal.

During normal hearing, sound waves papilloma virus trasmissione sangue through the ear canal and strike the eardrum causing it to vibrate. The eardrum is attached to three tiny bones in the middle ear.

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The last bone, the stapes, pushes on a fluid-filled chamber in the inner ear, called the cochlea. This fluid movement causes sensitive hair cells within the cochlea to bend. When the hair cells bend, they generate an electrical signal that is sent to the brain.

papilloma external ear canal

Age, disease, injury, or repeated exposure to loud noise can damage the various structures of the ear and interfere with hearing. There are two specific types of hearing loss: conductive hearing loss, which is caused by a mechanical problem in the ear canal or middle ear that blocks the conduction of sound; or sensorineural hearing loss, which is caused by damage to the inner ear, auditory nerve, or auditory nerve pathways in the brain.

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Conductive hearing loss is often reversible; sensorineural hearing loss is not. The external ear is the auricle, or pinna, a cartilage-supported fleshy flap that helps to funnel sound waves into the external auditory canal. Sound waves travel down this canal to the tympanic membrane, papilloma external ear canal thin sheet of connective tissue also known as the eardrum.

papilloma external ear canal

When sound waves strike the tympanic membrane, it vibrates. The mechanical energy of the sound waves is converted into the mechanical energy of eardrum vibration.

papilloma external ear canal

On the other side of the tympanic membrane lies the middle ear, or tympanic cavity. This is an air-filled, mucosa-lined cavity, which lies within the petrous portion of the temporal bone.

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The middle ear is flanked laterally by the eardrum and medially by a bony wall with two membrane-covered openings, the oval window and the round window. Running from the middle ear to the nasopharynx is the Eustachian, or phayngotympanic tube. The tube allows air pressure in the middle ear to equalize with air pressure in the atmosphere.

Medial to the middle ear is the inner ear, which contains the spiral-shaped cochlea, where sound waves are transduced into neural signals, and the papilloma external ear canal complex, which contains the receptors for our sense of equilibrium. Surrounding and protecting the membranous labyrinth is the bony labyrinth.

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Note that within the papilloma external ear canal, the membranous labyrinth is known as the cochlear duct and the bony labyrinth is known as the bony cochlea. Between the bony and membranous labyrinths flows the perilymph. Within the membranous labyrinth is a fluid called endolymph.

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