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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]
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]
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
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]
Transcortical sensory aphasia is characterized as a fluent aphasia. Fluency is determined by direct qualitative observation of the patient’s speech to determine the length of spoken phrases, and is usually characterized by a normal or rapid rate; normal phrase length, rhythm, melody, and articulatory agility; and normal or paragrammatic speech. [5]
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]
Other information about the patient can be retrieved from medical records, patient referrals from physicians, and the nursing staff. [35] In non-speaking patients who use manual languages, diagnosis is often based on interviews from the patient's acquaintances, noting the differences in sign production pre- and post-damage to the brain. [18]
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