Which finding would most clearly indicate a neuromotor basis for speech difficulties?

• A. Normal oral-motor function
• B. Phonological error pattern such as stopping
• C. High palate
• D. Fasciculations on protrusion and high palate

Answer: (D)

The important idea is to look for signs of how well the muscles and nerves that control speech are functioning, not just how the sounds are produced or what the mouth looks like structurally. Fasciculations are spontaneous twitches of muscle fibers that occur when motor neurons or the neuromuscular system aren’t working smoothly. If you see fasciculations during a tongue movement like protrusion, that points to a neuromotor problem affecting the speech muscles.

A high palate is an anatomical variation that can influence resonance or articulation, but on its own it doesn’t reveal ongoing neuromotor control issues. Normal oral-motor function suggests muscles and neural control are intact, so it doesn’t indicate a neuromotor basis. A phonological error pattern such as stopping reflects language planning or phonological processes rather than the neuromotor control of the articulators.

So, the presence of fasciculations during protrusion indicates a neuromotor basis for speech difficulties, making it the most telling finding.