Instead , multiple streams are involved in speech production and comprehension .
Modern models of the neurological systems behind linguistic comprehension and production recognize the importance of Broca 's and Wernicke 's areas , but are not limited to them nor solely to the left hemisphere .
Multiple streams are involved in speech production and comprehension .
Modern models of the neurological systems behind linguistic comprehension and production recognize the importance of Broca 's and Wernicke 's areas , but are not limited to them nor solely to the left hemisphere .