Communication Sciences and Disorders 4411A/B Lecture Notes - Lecture 13: Substantia Nigra, White Matter, Pragmatics
4 Jan 2021
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Communication sciences and disorders 4411a lecture 11a: neurogenic communication disorders i. Central nervous system brain and spinal cord. Peripheral nervous system nerves that connect body to brain and spinal cord. Altered brain development or brain damage can lead to many types of communication disorders. Brainstem and spinal cord provide sensory and motor pathways between body and brain. Brainstem or spinal cord damage can disrupt biological support for speech. Frontal primary motor cortex, executive functions. Parietal primary sensory cortex, cognitive functions. Temporal primary auditory cortex, language comprehension. First area of cortex to process auditory information. Along with cerebellum and subcortical structures (i. e. basal ganglia, thalamus) Located in temporal lobe, beside primary auditory cortex. Unilateral in left hemisphere in most people. Motor (innervate muscles of chest, abdomen, limbs) Anterior (exit front portion of spinal cord) Usually brain-based, acquired disorder: acquired motor speech disorders. Caused by weakness, paralysis, slowness, or incoordination of muscles responsible for speech.
