Brocaʹs Area: a Supramodal Hierarchical Processor?

Despite the presence of shared characteristics across the different domains modulating Brocaʹs area activity (e.g., structural analogies, as between language and music, or representational homologies, as between action execution and action observation), the question of what exactly the common denominator of such diverse brain functions is, with respect to the function of Brocaʹs area, remains largely a debated issue. Here, we suggest that an important computational role of Brocaʹs area may be to process hierarchical structures in a wide range of functional domains.