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Common clinical features of ataxic dysarthria include abnormalities in speech modulation, rate of speech, explosive or scanning speech, slurred speech, irregular stress patterns, and vocalic and consonantal misarticulations. [13] [14] Ataxic dysarthria is associated with damage to the left cerebellar hemisphere in right-handed patients. [15]
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]
A speech sound disorder (SSD) is a speech disorder affecting the ability to pronounce speech sounds, which includes speech articulation disorders and phonemic disorders, the latter referring to some sounds not being produced or used correctly. The term "protracted phonological development" is sometimes preferred when describing children's ...
The most common types of dysprosody are associated with dysarthria and developmental coordination disorder, which affect motor processing in speech. Among the most studied types are: Flaccid dysarthria is characterized by little control over pitch and voice volume, reduced speech rate, and impaired voice quality
FOXP2 is also required for the proper development of speech and language in humans. [7] In humans, mutations in FOXP2 cause the severe speech and language disorder developmental verbal dyspraxia. [7] [8] Studies of the gene in mice and songbirds indicate that it is necessary for vocal imitation and the related motor learning.
Developmental verbal dyspraxia (DVD), also known as childhood apraxia of speech (CAS) and developmental apraxia of speech (DAS), [1] is a condition in which an individual has problems saying sounds, syllables and words. This is not because of muscle weakness or paralysis.
Speech-language pathologists create plans that cater to the individual needs of the patient. If speech is not practical for a patient, the SLP will work with the patient to decide upon an augmentative and alternative communication (AAC) method or device to facilitate communication. They may work with other patients to help them make sounds ...
Speech production is a highly complex and extremely rapid process, and thus research into the involved mental mechanisms proves to be difficult. [10] Investigating the audible output of the speech production system is a way to understand these mental mechanisms.