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聋哑根据发病时间,分先天性聋哑和后天性聋哑。先天性聋哑在人群中的发病率为1/1000,我国约有10万先天性聋哑患者,其中50％与遗传有关。值得重视的是我国聋哑人常相互通婚,这就有可能将致病基因传给下一代,影响我国民族的素质,对个人、家庭、国家极为不利。故先天性聋哑正受到人们的关注。病因及临床表现先天性聋哑是胚胎期由于内耳畸型或未发育及听神经听中枢病变,致生后听力障碍,而不能说话。引起胚胎发育障碍的因素有:①遗传因素:由基因突变和染色体畸变引起。②妊娠期病毒感染:妊娠初
Deaf and dumb according to the time of onset, sub-congenital deaf and acquired deaf and dumb. Congenital deaf-mute in the population incidence rate of 1/1000, about 100,000 in our country deaf-mute patients, of which 50% are genetically related. It is worth noting that deaf-mutes in our country often get intermarried each other, which makes it possible to pass the genes to the next generation and affect the quality of our nation, which is extremely unfavorable to individuals, families and countries. Therefore, the deafness of congenital people are receiving attention. Etiology and clinical manifestations of congenital deaf and dumb embryo embryonic stage due to abnormal or not developed and auditory nerve center lesion, after birth, hearing impairment, and can not speak. Causes of embryonic development disorders are: ① genetic factors: caused by genetic mutations and chromosomal aberrations. ② pregnancy virus infection: early pregnancy