Damage to C (motor) wouldn’t explain fluency problems. Fluency (=Latin
flow; the ease with which the brain formulates words). Slurred speech is your brain knowing and formulating the words easy but your mouth muscles not co-operating!
So, dis-fluency ≠ slurred speech. This gentleman is dis-fluent in the same way you’re dis-fluent when you visit Paris: your brain struggles to formulate French words in the first place! The only lesion that explains that in your native tongue is a lesion to the language synthesis center = Broca’s area.
I put C because I thought that the weakness of the lower 2/3 face meant there was something more going on than just speech problems from Broca's aphasia.
Can anyone tell me why I'm wrong?