Which item is NOT listed as an 'other' cause of AOS?

• A. Damage to the insula and basal ganglia
• B. Degenerative disease
• C. Trauma
• D. Stroke

Answer: (D)

The idea here is recognizing how etiologies of apraxia of speech are categorized. In many references, causes that are not acute stroke—such as damage to the insula and basal ganglia, degenerative diseases, and trauma—are grouped together as “other” etiologies. Stroke, on the other hand, is typically treated as its own category because it is a distinct acute vascular event that can directly produce AOS. Since the question asks which item is NOT listed as an “other” cause, the one describing stroke fits that distinction: stroke is not included in the “other” group because it’s categorized separately. The other listed items—insular/basal ganglia damage, degenerative disease, and trauma—are examples of non-stroke etiologies that can lead to AOS, which is why they belong in the “other” category.