Forskning i talebehandling har haft svært ved at definere den funktionelle neuroanatomy. En ny model beskriver en dual-stream tilgang: en ventral strøm, der behandler talesignaler til forståelse, og en dorsal strøm, der forbinder akustiske signaler til artikulatoriske netværk i frontalområdet. Den ventrale strøm er bilateral, mens den dorsale strøm er domineret af venstre hjernehalvdel.
Titel på undersøgelse:
The Cortical Organization of Speech Processing.
| |
Hele abstrakt på originalsprog:
Despite decades of research, the functional neuroanatomy of speech processing has been difficult to characterize. A major impediment to progress may have been the failure to consider task effects when mapping speech-related processing systems. We outline a dual-stream model of speech processing that remedies this situation. In this model, a ventral stream processes speech signals for comprehension, and a dorsal stream maps acoustic speech signals to frontal lobe articulatory networks. The model assumes that the ventral stream is largely bilaterally organized–although there are important computational differences between the left- and right-hemisphere systems–and that the dorsal stream is strongly left-hemisphere dominant.