Mattias
Ragnehed1, Stefan Stenfelt1, Ingrid Johnsrude, 1,2,
Jerker Rnnberg1
Brain
activity induced by auditory speech perception at different noise levels was
captured by fMRI. The analysis revealed noise modulated activity in a number
of relevant areas. In response to increased noise level reduced activity was
found in auditory cortex and lingual gyrus whereas increased activity was
observed in dorsolateral prefrontal cortex. This is in line with the idea
that higher cognitive functions are engaged in order to extract the available
lingual information in an degraded auditory signal.
Keywords