Are muteness and deafness related?
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Are muteness and deafness related?
The reason why people can speak is entirely acquired through later learning. In addition to having a sound brain, the basic prerequisite for learning a language is good hearing. According to modern scientific research, babies with normal development already have hearing during the fetal period and are accustomed to listening to their mother's heartbeat. Therefore, if a mother holds her baby in her left hand, the baby will be quieter because he can hear the mother's heartbeat. Newborns generally begin to focus their hearing after two weeks and gradually respond to sounds in the world. In particular, pleasant light music often makes babies feel happy and can even calm them down from crying loudly.
Children begin to learn language half a year after birth, but at first they only produce primitive sounds. When they are about 1 year old, language learning enters a leap stage. If you have no hearing at this time, you will not be able to learn to speak, and you will become a deaf-mute. Generally speaking, children can master daily life language around the age of 3. Since there are few opportunities for repeated practice, language skills have not yet been consolidated. If they lose their hearing at this time, they will lose the opportunity to strengthen their language, and they will forget the words they have learned. Eventually, Will also become deaf-mute.
If you grow older, the situation will be much better by the age of 7-8. Even if you are deaf at this time, you can mostly retain your original language ability, but your voice and intonation will be somewhat different over time. Out of shape, but basically still capable of verbal expression. If it is an adult, since the language function has already been perfected, there is no possibility of language barriers. Although the person is deaf, he will not be mute. In the final analysis, the root cause of muteness lies in childhood hearing impairment and deafness.
When some parents bring their deaf-mute children for treatment, they often ask the doctor to examine the child's tongue, pharynx, larynx and other vocal organs in detail, thinking that "the tendons under the tongue are stuck, so they can't speak." Actually this kind of view is wrong. Diseases of the vocal organs will only cause hoarseness, unclear speech, or inaccurate articulation, but it is absolutely impossible to be unable to speak. Therefore, the focus of diagnosis and treatment should be on deafness. As long as you have certain hearing and a good brain, you can learn to speak. The deafness mentioned above is mostly the result of total deafness (a hearing loss of more than 90 decibels, and you can't hear even loud shouts).
If you are moderately deaf (hearing loss 40-55 decibels), you can still barely hear daily conversations. Most children with speech delay will be about 1 year or so.Eventually he will still be able to speak. 'If the child is severely deaf (hearing loss 55-70 decibels) and can barely hear loud speech, the speech ability of such children will be delayed for at least 2 to 1 year, and they often speak unclearly and have incomplete speech disorder. Many children with deafness have high-frequency hearing loss and good low-frequency hearing preservation, such as those caused by ototoxic antibiotic poisoning. Such children often can pronounce low-frequency words such as two, five, and eight clearly, but they can still pronounce three and four clearly. , 7th and other high-frequency sounds are difficult. This phenomenon also indicates the existence of deafness rather than a "big tongue".
There is no difficulty in diagnosing deafness in adults, but it is often difficult to identify children. The younger the age, the more difficult it is. Many. In the past, it was customary to use clapping, ringing and other sounds to observe whether children responded, and the examination was relatively rough. In the past decade, audiological examinations have made major breakthroughs. They have evolved from the subjective listening stage in the past (that is, based on whether the person being tested said they heard or not). (to determine their hearing level) jumps into the stage of objective observation and listening. Hearing can be detected from the changes in nerve waves in each section of the auditory pathway without the subject's indication, making the hearing test of young children more objective and reliable. . Some units in our country have conducted this examination on newborns to detect congenital deafness early, but it is not yet popular.With the rapid development of China's economy, people's living standards have also improved. has been greatly improved, and today's medical level has also undergone rapid changes. Most otological deafness-causing lesions can be treated with drugs or surgery, and hearing impairments that cannot be medically treated can also be rehabilitated with Hearing Aids or electronic cochlear devices. Intervention and language communication can also be carried out through speech rehabilitation training. The era of "ten deaf and nine dumb" is long gone.