What are the reasons for learning skills development disorder?

summary

Learning skills development disorder refers to children's acquisition and development of learning skills in early school age under the same educational conditions. These disorders are not caused by mental retardation, central nervous system diseases, visual, auditory or emotional disorders. They mostly originate from cognitive impairment and are based on biological factors in the process of neural development. They may be secondary or accompanied by behavioral or emotional disorders, but they are not the direct consequences. Next, I'll tell you something.

What are the reasons for learning skills development disorder?

Clinical observation and epidemiological study showed that dyslexia had family tendency. Sysvia et al. Found that the incidence rate of reading difficulties is over 45%. Studies on twins also showed that the same disease rate of identical twins was higher than that of heterozygous twins, and the ratio was 87% to 24%. Gene linkage analysis showed that there was an autosomal genetic locus on chromosome 15; The locus on chromosome 6 has also been reported.

Some scholars also used binaural hearing separation technology, electrophysiological methods, cortical blood flow analysis, half field of vision and other methods to study brain functional lateralization, and found that children with dyslexia have abnormal brain structure lateralization, which may be caused by abnormal fetal blood testosterone level, leading to abnormal development.

Some scholars believe that there are abnormalities or defects in the process of children's word system processing; Or it is the abnormal pattern of literacy or language access. Another part is cognitive style or spatial perception disorder. Some people think it is caused by vestibular dysfunction of inner ear. Negative life events of parents and families can aggravate such problems.

matters needing attention

Mental retardation the reading performance of standardized individual test for mental retardation is consistent with the expected level determined by intelligence and education. Reading performance and intelligence level are lower than the general level.