Another prominent view is that stuttering is caused by neural synchronization problems in the brain. Recent research indicates that stuttering may be correlated with disrupted fibers between the speech area and language planning area, both in the left hemisphere of the brain. Such a disruption could potentially be due to early brain damage or to a genetic defect.
Structural neuroimaging, where the anatomy of the brain can be visualized and analyzed, has shown an anatomical difference between the brains of those who stutter and those who do not: see research by Sommer et al. and Jaehnke et al. And, functional neuroimaging, where processes in the brain can be observed, has shown some differences in the state of stuttering. Differences in brain activity have been observed in other areas that are associated with speech motor function, such as the area of the primary motor cortex that controls mouth movements, the areas associated with perceiving and decoding sounds, the areas involved with the formulation and expression of language, and the area that controls the human body's Valsalva mechanism.