What pattern is common in neurodegenerative etiologies of apraxia of speech?

• A. Progressive worsening of speech planning and sequencing with relatively preserved comprehension early on
• B. Rapid recovery of speech with worsening comprehension
• C. Normal progression of speech but impaired nonverbal cognition
• D. Early severe dysphagia with preserved speech

Answer: (A)

In neurodegenerative apraxia of speech, the defining pattern is a gradual decline in the ability to plan and sequence the movements needed for speech, while understanding spoken language stays relatively intact early on. This motor-planning impairment causes speech to become slow, effortful, and often groped, with errors that worsen as the disease progresses. Because the problem lies in programming articulatory movements rather than language content, comprehension and nonverbal thinking are usually preserved early, even as speech deteriorates. The other patterns don’t fit this picture: rapid recovery would be inconsistent with a degenerative course, and a normal speech trajectory with early nonverbal cognitive impairment points away from primary motor planning for speech. Early severe dysphagia with preserved speech also suggests a different pattern of bulbar involvement rather than apraxia of speech itself.