Functional relevance of interhemispheric fiber tracts in speech processing

► We discuss the role of the interhemispheric fibers in speech processing. ► Recent fMRI and DTI revealed interindividual differences of interhemispheric fibers between the auditory cortices. ► Shape, amount and size correlate with speech-functions and speech-related symptoms. ► This indicates a specific structure-function relationship. ► Recent fMRI and DTI findings were summarized.