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Developmental coordination disorder (DCD), also known as developmental motor coordination disorder, developmental dyspraxia, or simply dyspraxia (from Ancient Greek praxis 'activity'), is a neurodevelopmental disorder [1] characterized by impaired coordination of physical movements as a result of brain messages not being accurately transmitted to the body.
Speaking is an act dependent on thought and timed execution of airflow and oral motor / oral placement of the lips, tongue, and jaw that can be disrupted by weakness in oral musculature or an inability to execute the motor movements needed for specific speech sound production (apraxia of speech or developmental verbal dyspraxia).
Dyspraxia: poor motor planning (more related to the vestibular system and proprioception) Poor bilateral integration: inadequate use of both sides of the body simultaneously; Tactile defensiveness: negative reaction to tactile stimuli; Visual perceptual deficits: poor form and space perception and visual motor functions
Developmental verbal dyspraxia (DVD), also known as childhood apraxia of speech (CAS) and developmental apraxia of speech (DAS), [3] [4] is an inability to utilize motor planning to perform movements necessary for speech during a child's language learning process. Although the causes differ between AOS and DVD, the main characteristics and ...
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.
Apraxia is a motor disorder caused by damage to the brain (specifically the posterior parietal cortex or corpus callosum [1]), which causes difficulty with motor planning to perform tasks or movements.
In psychology and neuroscience, motor planning is a set of processes related to the preparation of a movement that occurs during the reaction time (the time between the presentation of a stimulus to a person and that person's initiation of a motor response).
Since 1905 Liepmann proposed a hypothesis of an action processing system that is found in the left hemisphere of the brain, which is dedicated to skilled, motor planning that guides the movement of the body. Yet, he still was never able to produce two patients with the same brain damage that showed ideational apraxia.