et some areas of the superior temporal gyrus seemed to respond to the onset of speech just as quickly as the primary auditory cortex responded to simple sound characteristics, like frequency.
The observation invited a tantalizing hypothesis: that the two brain regions were processing different aspects of the same input in parallel, and that “this parallel pathway for speech perception can bypass the primary auditory cortex — which is where we thought all of the information was supposed to go,” Hamilton said.
...
Complex musical and speech elements are processed separately, with their representations forming at least partly in parallel.
, the primary auditory cortex receives signals that have already undergone much more processing, and it represents information in a much more context-sensitive way. It’s “functionally much more downstream than primary visual cortex is,” said David Poeppel, a neuroscientist at New York University.
https://www.quantamagazine.org/the-brain-processes-speech-in-parallel-with-other-sounds-20211021
No comments:
Post a Comment