Without question, the functions of BA45 are significatively coincidental with the functions of BA44, supporting the proposal that they both, at least partially, correspond to a single system. Nonetheless, BA45 seems to be involved in relatively more complex verbal functions, for instance, processing of metaphors and reasoning processes. As observed with BA44, BA45 participate in a diversity of functions difficult to interpret with our current understanding of the brain (e.g., smelling of familiar odors) and probably reflecting some inner speech during the performance of those tasks. BA45 participation in working memory may also reflect the internal rehearsal of the information.
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