Dyslexia is a term used in science used for serious problems of reading. The underlying causes are generally assumed that a dysfunction in the phonological processing of language is the basis of the reading problem.
Early childhood
Dyslexia is a developmental disorder that affects people of all ages, but the symptoms vary with age. In studies, children who have genetic risk of dyslexia have difficulties with speech production and grammatical development reported in an age of 30 months. It is followed by a slower vocabulary acquisition, resulting delays in phonological development and alphabet knowledge with young schoolchildren.
Later childhood
Dyslexia manifests itself in full size with school aged children. Although in most cases, the speech perception is intact, dyslexic children have difficulty thinking about the sound structure of spoken words. By such phonological problems it is difficult for them to learn the difference between sounds and letters of printed words. Most dyslexic children have difficulty with aphonetic approach to reading and spelling when they are not capable of the sound structure of words display.
Although many dyslexic children overcome their problems, some of them have subtle problems as adults. It is proved that dyslexic adults have only one part of the brain areas normally involved. It is likely that their phonological difficulties are the result of a weak connection between the language areas on the front and back of the left hemishere.
