Dyslexia is a specific reading disability due to a defect in the brain's (higher cortical) processing of graphic symbols. Dyslexia is thus a learning disability that alters the way the brain processes written material. The effects of dyslexia vary from person to person. The only common trait among people with dyslexia is that they read at levels significantly lower than typical for people of their age and intelligence. Dyslexia is different from reading retardation which may, for example, reflect mental retardation or cultural deprivation. Treatment of dyslexia should be directed to the specific learning problems of affected individuals. The usual course is to modify teaching methods and the educational environment to meet the specific needs of the individual with dyslexia. The prognosis (outlook) for people with dyslexia is mixed. The disability affects such a wide range of people, producing different symptoms and varying degrees of severity, that predictions are hard to make. The prognosis is generally good, however, for individuals whose dyslexia is identified early, who have supportive family and friends and a strong self-image, and who are involved in a proper remediation program. This entry is based in part upon information from the National Institute of Neurological Disorders and Stroke, the National Institutes of Health (NIH).
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Impaired reading ability with a competence level below that expected on the basis of the individual's level of intelligence, and in the presence of normal vision and letter recognition and normal recognition of the meaning of pictures and objects. SYN: incomplete alexia. [dys- + G. lexis, word, phrase]

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dys·lex·ia dis-'lek-sē-ə n a variable often familial learning disability involving difficulties in acquiring and processing language that is typically manifested by a lack of proficiency in reading, spelling, and writing

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a developmental disorder selectively affecting a child's ability to learn to read and write. The condition affects boys more often than girls and can create serious educational problems. It is sometimes called specific dyslexia, developmental reading disorder, or developmental word blindness to distinguish it from acquired difficulties with reading and writing. Compare alexia.
dyslexic adj.

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dys·lex·ia (dis-lekґse-ə) [dys- + lexis word + -ia] inability to read, spell, and write words, despite the ability to see and recognize letters; a familial disorder with autosomal dominant inheritance that occurs more frequently in males. Cf. alexia. dyslexic adj

Medical dictionary. 2011.

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Look at other dictionaries:

  • dyslexia — n. an impaired ability to read. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • dyslexia — c.1887, from Ger. dyslexie (1883), from Gk. dys bad, abnormal, difficult (see DYS (Cf. dys )) + lexis word, from legein speak (see LECTURE (Cf. lecture) (n.)). Dyslexic (n.) is first recorded 1961; dyslectic (adj.) from 1964 …   Etymology dictionary

  • dyslexia — ► NOUN ▪ a disorder involving difficulty in learning to read or interpret words, letters, and other symbols. DERIVATIVES dyslexic adjective & noun. ORIGIN from Greek lexis speech (apparently by confusion of Greek legein to speak and Latin legere… …   English terms dictionary

  • dyslexia — [dis lek′sē ə] n. [ModL < DYS + lexis, speech < legein, to speak: see LOGIC] impairment of the ability to read, often as the result of genetic defect or brain injury dyslexic [dislek′sik] adj., n. dyslectic [dislek′tik] …   English World dictionary

  • Dyslexia — This article is about developmental dyslexia. For acquired dyslexia, see Alexia (acquired dyslexia). Dyslexia Classification and external resources ICD 10 R48.0 ICD 9 …   Wikipedia

  • dyslexia — /dis lek see euh/, n. Pathol. any of various reading disorders associated with impairment of the ability to interpret spatial relationships or to integrate auditory and visual information. [1885 90; < NL < Gk dys DYS + léx(is) word + ia IA] * * * …   Universalium

  • dyslexia — [[t]dɪ̱sle̱ksiə[/t]] N UNCOUNT If someone suffers from dyslexia, they have difficulty with reading because of a slight disorder of their brain. [TECHNICAL] …   English dictionary

  • dyslexia —    A lack of ability to read, often characterized by reversals. To a dyslexic person, a printed page may appear to be a jumble of incoherent data. Dyslexia is a common learning disability. (pr. diss leck see uh) …   Glossary of Art Terms

  • dyslexia — n. a developmental disorder selectively affecting a child s ability to learn to read and write. The condition affects boys more often than girls and can create serious educational problems. It is sometimes called specific dyslexia, developmental… …   The new mediacal dictionary

  • dyslexia — n. an abnormal difficulty in reading and spelling, caused by a condition of the brain. Derivatives: dyslexic adj. & n. dyslectic adj. & n. Etymology: G Dyslexie (as DYS , Gk lexis speech) * * * dyslexia, dyslexic see dys …   Useful english dictionary

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