In differentiating childhood apraxia of speech from flaccid dysarthria in a child, which information provides the most diagnostic value?

• A. The child's willingness to function in sociocommunicative events
• B. A history of the child's language development
• C. The child's articulation performance at the sentence level
• D. A history of the child's development of chewing, eating, and swallowing

Answer: (D)

The most diagnostic information is a history of how feeding, chewing, and swallowing developed. A pattern of early or persistent difficulties with eating and safe swallowing signals bulbar weakness impacting the muscles of the mouth and throat. That bulbar involvement is characteristic of a motor speech disorder like flaccid dysarthria, where weakness of the lips, tongue, palate, and related muscles can affect both speech and swallowing.

In contrast, childhood apraxia of speech is a motor planning/programming issue for speech movements, and feeding and swallowing are typically not affected in the same systematic way. So a clear history of feeding and swallowing problems provides stronger evidence for a dysarthria with lower motor neuron involvement than for CAS.

The other options—willingness to participate in social communication, the child’s general language development history, or articulation performance at the sentence level—can be informative for broader developmental or communicative profiles but do not distinguish motor speech disorders as specifically.