Dyslexia is simply defined as an age type of mental disability is, first, that the observed and seen some of their pre-school. his definition is more accurate and comprehensive is that it is a disorder with a neurological origin. People with disabilities have difficulties in detecting and recording the words in terms of speaking, reading and spelling. while there are some diseases that are characterized by difficultiesin reading, to make the symptoms of dyslexia called compromise is very different from the others.

The definition of dyslexia is growing deeper with the symptoms that show that people with learning disabilities in groups of various ages. Dyslexia Symptoms vary considerably in different age groups. Children who suffer from learning disabilities development, said her preschool often observed with a significant delay in language and are very much backin learning new words. young people suffering from dyslexia can also be observed with the mirror writing, the letters are often written in its inverse form. and as for this error to the development of school children with dyslexia is already difficult to deal with the rhymes, rhyming words kindergarten especially those mentioned. on the other hand, the children already in elementary school very poor reading and spelling performances. even worse is that these childrencould not see the significant distinction between letters and words, just because the word through organizations sites that are not yet clear to them.

Symptoms of dyslexia in people who already around in the secondary and older are often not visible to other people for them. this is simply because people in this age are already in dyslexics able to hide their disability. In a much broader sense, with dyslexics are those who have average IQ, that values ??belowfor her age. until now, there are still trying and still known causes of learning difficulties are discussed. although dyslexia is often seen as a result of various pathological conditions, the number of theories have been formulated and researchers of health experts to issue a response to the next. these theories are the theory of the brain, the evolutionary hypothesis magnocellular theory of naming speed deficit and double deficit theory of visual perceptual noiseReasons for the exclusion, the phonological deficit theory fast processing of auditory, visual and theory. although the above-mentioned theories are different definitions, most of them are clearly linked to the central nervous system.