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Dysgraphia should be distinguished from agraphia (sometimes called acquired dysgraphia), which is an acquired loss of the ability to write resulting from brain injury, progressive illness, or a stroke. [7] The prevalence of dysgraphia throughout the world is not known, due to difficulties in diagnosis and lack of research.
Phonological dyslexia is a reading disorder in which the patient has impaired reading of nonwords. The symptoms of phonological dyslexia are very similar to those of deep dyslexia. The major difference between these two dyslexias is that phonological dyslexics do not make semantic errors associated with deep dyslexia.
Pure alexia, also known as agnosic alexia or alexia without agraphia or pure word blindness, is one form of alexia which makes up "the peripheral dyslexia" group. [1] Individuals who have pure alexia have severe reading problems while other language-related skills such as naming, oral repetition, auditory comprehension or writing are typically ...
In 1993, Castles and Coltheart described developmental dyslexia as two prevalent and distinct varieties using the subtypes of alexia (acquired dyslexia), surface and phonological dyslexia. [23] Understanding these subtypes is useful in diagnosing learning patterns and developing approaches for overcoming visual perception impairments or speech ...
Disorder of written expression is a type of learning disability in which a person's writing ability falls substantially below normally expected range based on the individual's age, educational background, and measured intelligence. Poor writing skills must interfere significantly with academic progress or daily activities that involves written ...
Acquired disorders result from brain injury, stroke or atrophy, many of these issues are included under the Aphasia umbrella. Brain damage, for example, may result in various forms of aphasia if critical areas of the brain such as Broca's or Wernicke's area are damaged by lesions or atrophy as part of a dementia.
Dyscalculia (/ ˌdɪskælˈkjuːliə /) [1][2][3][4] is a learning disability resulting in difficulty learning or comprehending arithmetic, such as difficulty in understanding numbers, numeracy, learning how to manipulate numbers, performing mathematical calculations, and learning facts in mathematics. It is sometimes colloquially referred to ...
Orthographic dyslexia, a subtype of dyslexia, results in difficulty decoding and encoding skills due to slow and inaccurate rates of storing word and letter formations into memory. Orthographic dyslexics have difficulty in storing mental representation of words, especially phonetically irregular words such as word spellings that end in -ight ...