About the book
Learning disabilities are heterogeneous groups of disorders characterized by the presence of failure to acquire, retrieve and use information competently. These disorders have a multifactorial etiology and are most common and severe in children, in particular in children with other chronic health conditions. The prevalence of learning disorders depends on the criteria used to define learning disorders; however different data indicate that lifetime prevalence in children of the USA in about 10 percent.
Core features of learning disabilities consist in prevalent cognitive difficulties even if disorders of reading and writing expressions are the most common forms of learning disorders; more uncommon are math disabilities as dyscalculia.
Prevalence of reading disability among school-age children depends upon the criteria used for definition; however, the prevalence of written expression disorders in estimated to be between 5 and 12 percent, the prevalence of written expression disorders is estimated to be between 7 and 15 percent, while the prevalence of dyscalculia is estimated to be between 3 and 6 percent.
Risk factors for learning disorders are family history, socio-economic conditions, prematurity, presence of other developmental, mental and health conditions (e.g. behavioral disorders, autism, attention deficit and hyperactivity disorders), prenatal exposition to neurotoxic agents, genetic disorders, particular medical conditions, history of traumatic brain injury or other neurological conditions.