What is hereditary deafness?
hereditary deafness is a condition that is handed over to children from one or both parents through genetic make -up. The final result is hearing loss, which may or may not be present from birth. In some children, this simply means that they are susceptible to suffer from hearing loss later in their lives. Others can show signs of not only hearing loss, but also other related conditions such as blindness or impaired speech.
Genetic information can be done on dominant or recessive genes. In cases where it is carried out on the dominant gene, only one parent has a gene to affect the child. In recessive genes, the child must get the gene from both parents to manifest. One of the most common types of recessive hereditary deafness is Usher's syndrome, in which the individual demonstrates not only hearing loss, but also different levels of blindness.
Symptoms of hereditary deafness may occur in many ways. Those affected by syndromic hearing loss can show pOkozing equipment associated with hearing, such as difficulty in language or balance. With the non -syndromic loss of hearing is the only affected thing that can be heard. The beginning varies depending on the individual and may be evident before or after the ability to speak. There is no severity of hearing loss, because some individuals may suffer only a slight loss of hearing, while others may have a deep or serious loss.
hereditary deafness can affect different areas of the body. The hearing loss occurs when the inherited abnormality occurs in the formations and structures of the middle or outer ear, while the hearing loss occurs due to abnormalities in the inner ear. There are other structures that are associated with the ability of a person to hear, including the cranial nerve, cortex and brain stem. I hired inherited disorders of these other structures is central auditory dysfunction.
existsMore than 400 different inherited conditions that include hearing loss as part of their condition. Waardenburg's syndrome is characterized by different levels of hearing loss accompanied by abnormal pigments in the skin, eyes and hair. Osteoarthrosis is associated with the loss of hearing in Stickler's syndrome and in individuals who show hearing loss together with the abnormalities of the outer ear, there are individuals who show hearing loss along with abnormalities of the outer ear.
genetic testing can determine whether individuals carry a gene for hereditary deafness. When a child shows hearing loss, it is not always because of hereditary condition. This may be due to environmental factors, prenatal infections or even bacterial infections. The causes of hearing loss can be determined by parents who intend to have more children.