But new research indicates that in stutterers , there is a decreased blood flow in the brain 🧠 part called broca area in the left frontal lobe. Blood flow refers to the amount of neural activity. The less the blood flow the lower the neural activity thus severer the stutter. In both cases , the deficit is in the broca s area. I do agree thAt for broca s aphasia patients , stuttering is just the accompanying problem with many other kinds of speech difficulties other than disfluency Are you saying that if we go to a neurologist he does a brain scan , he wont be able to differentiate a stutterers brain from a normal without a control. Would he just say there is nothing wrong with your brain even despite the new studies that found abnormal neural activity and structural abnormalities?