Answer :
Final answer:
It is associated with spastic dysarthria is b) Amyotrophic lateral sclerosis (ALS), which is a progressive neurodegenerative disorder.The correct option is b) Amyotrophic lateral sclerosis (ALS).
Explanation:
Spastic dysarthria is a speech disorder that can occur in various degenerative diseases. It is characterized by slow, labored speech and can be associated with muscular rigidity and spasms. A key feature of ALS, also known as Lou Gehrig’s disease, is the degeneration of the motor neurons that control voluntary movements, ultimately leading to muscle weakness and stiffness. As ALS progresses, it can cause spastic dysarthria due to the impact on muscles that control speech, resulting in a distinct speech pattern that is often slow and difficult to understand.
Other neurodegenerative disorders such as Parkinson’s disease, Multiple sclerosis (MS), and Huntington's disease can also affect speech but are associated with different types of dysarthria and varying underlying mechanisms. Parkinson’s disease usually leads to hypokinetic dysarthria, MS can cause several forms including spastic, while Huntington’s disease often results in hyperkinetic dysarthria due to the excessive movements characteristic of this condition.
