Yes stuttering can be detected by brain measurement scanners. For example: [Research](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10158639/): fNIRS has been validated as a tool to measure DLPFC activation associated with stuttering anticipation [Research](https://www.sciencedirect.com/science/article/abs/pii/S0306452218300678): MRI results: Anticipatory anxiety, critically influence speech communication behavior in adults who stutter. Activity in the right amygdala, a key anatomical region in the limbic system involved in emotion, was significantly correlated with stuttering occurrences in adults who stutter. Right amygdala activity from pooled data of all participants also showed a significant correlation with discomfort level during the experiment. Activity in the prefrontal cortex, which forms emotion regulation neural circuitry with the amygdala, was decreased in adults who stutter than in fluent controls. [Research](https://www.nyu.edu/about/news-publications/news/2024/february/how-our-brains--beta-waves-predict-stuttering.html): MEG results: Can a device finally see when we are about to stutter? NEW research (2024): "How our brains' Beta Waves predict stuttering" [Research](https://www.researchgate.net/publication/352029918_STUTTERING_DOPAMINE_AND_INCENTIVE_LEARNING): Perceiving stuttering anticipation as a problem and to be avoided - can lead to a drop in striatal post-synaptic dopamine release resulting in stuttering. This is not the case when people who stutter - speak fluently.