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Questions and Answers
Which region of the brain is the origin of the direct activation pathways?
Which region of the brain is the origin of the direct activation pathways?
- Motor cortices (correct)
- Spinal cord
- Brainstem
- Cortex
Which neural pathways are affected in spastic dysarthria?
Which neural pathways are affected in spastic dysarthria?
- Direct activation pathways
- Indirect activation pathways
- Both direct and indirect activation pathways (correct)
- None of the above
Which muscles are not innervated bilaterally by the corticobulbar tract in spastic dysarthria?
Which muscles are not innervated bilaterally by the corticobulbar tract in spastic dysarthria?
- Trapezius and tongue
- Lower face, trapezius, and tongue (correct)
- Lower face and tongue
- Lower face and trapezius
What is the function of the direct activation pathways?
What is the function of the direct activation pathways?
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What are the clinical features of spastic dysarthria?
What are the clinical features of spastic dysarthria?
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Study Notes
Brain Regions and Neural Pathways
- The origin of the direct activation pathways is the primary motor cortex.
- The neural pathways affected in spastic dysarthria are the corticobulbar and corticospinal tracts.
Muscle Innervation
- The muscles not innervated bilaterally by the corticobulbar tract in spastic dysarthria are the lower facial muscles.
Function of Direct Activation Pathways
- The direct activation pathways are responsible for rapid, precise, and voluntary movements of the articulators, lips, tongue, and vocal cords.
Clinical Features of Spastic Dysarthria
- Spastic dysarthria is characterized by excessively strained and effortful speech, articulatory imprecision, and abnormal Prosody.
- Other features include slow speech rate, monopitch, and short phrase length.
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Description
Test your knowledge on the neural pathways and neuropathology involved in spastic dysarthria. Learn about the direct activation pathways and their role in motor control and speech musculatures.
