Which finding would most strongly suggest a neurological etiology for a language impairment rather than a developmental language disorder?

• A. Isolated delay in spoken language only
• B. Coexisting motor signs or abnormal hearing tests
• C. Normal imaging
• D. Onset after age 5

Answer: (B)

When a language impairment has a neurological basis, you expect signs beyond just language delay. Coexisting motor signs or abnormal hearing tests point to involvement of the nervous system or sensory pathways that support language. Motor signs—such as abnormal movements, dysarthria, or gait abnormalities—suggest underlying neurological dysfunction affecting speech planning or execution. Abnormal hearing tests indicate a sensory problem that can disrupt language development from the start, signaling a neuro-sensory contribution rather than a purely developmental language disorder.

In contrast, an isolated delay in spoken language with no other neurological or sensory findings is more typical of a developmental language disorder. Normal imaging doesn’t rule out neurological issues, since some neuro conditions aren’t visible on scans, whereas the presence of motor or hearing signs provides stronger, direct evidence of neurological involvement. Onset after age five is less characteristic of a primary developmental language disorder and doesn’t by itself establish a neurological etiology the way motor or sensory signs do.