Which condition is described as verbal apraxia in childhood and involves the left frontal lobe affecting the precentral gyrus and premotor cortex?

• A. Aphemia
• B. Alexia with agraphia
• C. Wernicke's aphasia
• D. Conduction aphasia

Answer: (A)

Verbal apraxia is a motor planning disorder for speech that stems from damage to the left frontal speech-motor network, including the precentral gyrus and premotor cortex. When this network is disrupted, the person knows what they want to say and understands language, but the brain’s program for the articulatory movements cannot be executed smoothly. In childhood, this presentation is often called aphemia, characterized by severe speech disturbance with relatively preserved language abilities and other non-speech movements.

This differs from alexia with agraphia, which is a reading and writing impairment from posterior language areas; from Wernicke’s aphasia, which involves fluent but meaningfully impaired speech with poor comprehension; and from conduction aphasia, which features fluent speech and good comprehension but impaired repetition due to a disconnection between language areas. The left frontal motor planning involvement best fits the described verbal apraxia (aphemia).