Paralexia is a reduction in reading ability characterized by the transposition or supplementation of

words A word is a basic element of language that carries an objective or practical meaning, can be used on its own, and is uninterruptible. Despite the fact that language speakers often have an intuitive grasp of what a word is, there is no consen ...

syllables A syllable is a unit of organization for a sequence of speech sounds typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "bu ...

. It usually is an acquired condition associated with

brain A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a v ...

injury such as alexia or acquired

dyslexia Dyslexia, also known until the 1960s as word blindness, is a disorder characterized by reading below the expected level for one's age. Different people are affected to different degrees. Problems may include difficulties in spelling words, r ...

, for example, as the result of a

stroke A stroke is a medical condition in which poor blood flow to the brain causes cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. Both cause parts of the brain to stop functionin ...

. There are several types of paralexias depending on the type of reading errors: orthographic paralexias, semantic paralexias, inflectional and derivational paralexias, function word substitutions, regularization errors and orthographic-then-semantic paralexias.Alexia, Rhonda B. Friedman, Georgetown University Medical Center
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References

{{Reflist Alexia (condition) Dyslexia