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A neurodevelopmental disorder, causing persistent difficulty with language, affecting about 7–9% of the population. Developmental verbal dyspraxia In individuals with normal muscle tone and speech muscle coordination, partial loss of the ability to consistently pronounce words. Dizziness
Speech disorders affect roughly 11.5% of the US population, and 5% of the primary school population. [5] Speech is a complex process that requires precise timing, nerve and muscle control, and as a result is susceptible to impairments. A person who has a stroke, an accident or birth defect may have speech and language problems. [6]
There is a considerable similarity among aphasia syndromes in terms of picture-naming behavior, however anomic aphasiacs produced the fewest phonemic errors and the most multiword circumlocutions. These results suggest minimal word-production difficulty in anomic aphasia relative to other aphasia syndromes. [17]
Dysarthria does not include speech disorders from structural abnormalities, such as cleft palate and must not be confused with apraxia of speech, which refers to problems in the planning and programming aspect of the motor–speech system. [4] Just as the term "articulation" can mean either "speech" or "joint movement", so is the combining form ...
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]
Expressive language disorder – characterized by difficulty expressing oneself beyond simple sentences and a limited vocabulary. Individuals can better understand than use language; they may have a lot to say, but have more difficulty organizing and retrieving the words than expected for their developmental stage. [9]
Apraxia of speech (AOS), also called verbal apraxia, is a speech sound disorder affecting an individual's ability to translate conscious speech plans into motor plans, which results in limited and difficult speech ability. By the definition of apraxia, AOS affects volitional (willful or purposeful) movement
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.