What Are the Most Common Causes of Cochlear Damage?

The auditory nerve consists of the cochlear and vestibular nerves. They pass through the inner ear canal to the inner ear together, so they can often be damaged at the same time. They show symptoms of hearing and balance. Although the two are two different components of the same nerve, The etiological response is not very consistent.

Auditory nerve damage

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The auditory nerve consists of the cochlear and vestibular nerves. They pass through the inner ear canal to the inner ear together, so they can often be damaged at the same time. They show symptoms of hearing and balance. Although the two are two different components of the same nerve, The etiological response is not very consistent.

1. Hearing impairment: Patients often describe tinnitus, a sense of obstruction in the external auditory canal, and hearing loss, especially poor treble feeling, which is deaf

(A) inner ear vertigo (aural vertigo) also known as Meniere's disease. Occurs in 30-50 years of age, clinically characterized by hearing impairment, tinnitus and dizziness. Dizziness often occurs suddenly, and tinnitus is often exacerbated before the attack, accompanied by transient horizontal nystagmus during the attack, with severe nausea, vomiting, pale, sweating and other vagus nerve irritation symptoms. The attack lasts several minutes, hours or days. Intervals vary in length, each episode further reduces hearing loss, and episodes decrease with increasing deafness. By the time of complete deafness, the loss of lost function and the onset of dizziness cease. The glycerol test was positive.

(2) Vestibular neuronitis (vestibular neuronitis) often occurs within a few days after an upper respiratory tract infection and may be related to the virus invasion of the vestibular neurons. Clinical features are acute onset of dizziness, nausea, vomiting, nystagmus and imbalanced posture. Vestibular dysfunction on one side, but no hearing impairment. Dizziness usually lasts about half a month. The temperature change test showed that the vestibular function was reduced and recovered after healing.

(three)

Hearing aids that use hearing aids to amplify sounds to help patients with conductive or sensorineural hearing loss, especially those with hearing loss at normal speech frequencies. Hearing aids can also help patients with predominantly high-frequency hearing loss or those with single-ear hearing loss. Hearing aids by

Treatment map

The microphone collects sound, the amplifier increases the volume, and the speaker conducts the amplified sound. Cochlear implantation can be used in patients with severe hearing loss who still cannot hear sound with hearing aids. The implant consists of electrodes inserted into the cochlea and an internal driver placed in the skull, which is connected to an external driver, a speech processor, and a microphone. The microphone collects sound waves, and the processor converts the sound waves into electrical impulses, which are transmitted to the internal driver through the external driver, and then to the electrode, and the electrode current stimulates the auditory nerve.

Cochlear implantation does not convert sounds like normal cochlea, and has different effects on different patients. It can help some patients perform lip reading, some patients can distinguish certain words, and some patients can listen to the phone. Cochlear implants can also help deaf people listen to and distinguish between ambient sounds and warning signals, such as doorbells, phone calls, and alarm sounds. Cochlear implantation is more effective for recent hearing loss or for those who have successfully used hearing aids.