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Anomic aphasia, also known as dysnomia, nominal aphasia, and amnesic aphasia, is a mild, fluent type of aphasia where individuals have word retrieval failures and cannot express the words they want to say (particularly nouns and verbs). [1]
Aphasia, also known as dysphasia, [a] is an impairment in a person’s ability to comprehend or formulate language because of damage to specific brain regions. [2] The major causes are stroke and head trauma; prevalence is hard to determine, but aphasia due to stroke is estimated to be 0.1–0.4% in developed countries. [3]
There is a regularity effect associated with lexical agraphia in that individuals are less likely to correctly spell words without regular, predictable spellings. [2] Additionally, spelling ability tends to be less impaired for common words. [2] Individuals also have difficulty with homophones. [2]
The most common cause of expressive aphasia is stroke. A stroke is caused by hypoperfusion (lack of oxygen) to an area of the brain, which is commonly caused by thrombosis or embolism. Some form of aphasia occurs in 34 to 38% of stroke patients. [23] Expressive aphasia occurs in approximately 12% of new cases of aphasia caused by stroke. [24]
Dysgraphia can be difficult to diagnose because the handwriting starts out clear and slowly degrades, making the writer appear lazy. Motor dysgraphia (sometimes called peripheral dysgraphia) [16] is due to deficient fine motor skills, poor dexterity, poor muscle tone or unspecified motor clumsiness.
Problems may include difficulties in spelling words, reading quickly, writing words, "sounding out" words in the head, pronouncing words when reading aloud and understanding what one reads. [3] [7] Often these difficulties are first noticed at school. [2] The difficulties are involuntary, and people with this disorder have a normal desire to ...
Neologistic paraphasias, a substitution with a non-English or gibberish word, follow pauses indicating word-finding difficulty. [13] They can affect any part of speech, and the previously mentioned pause can be used to indicate the relative severity of the neologism; less severe neologistic paraphasias can be recognized as a distortion of a real word, and more severe ones cannot.
Dyslexia is a learning difficulty that primarily affects the skills involved in accurate and fluent word reading and spelling. Characteristic features of dyslexia are difficulties in phonological awareness, verbal memory and verbal processing speed. Dyslexia occurs across the range of intellectual abilities.