Novi, MI, August 27 – Some 42 former professional athletes suffering from the results of Traumatic Brain Injuries (TBI) that occurred during their playing careers will participate in a groundbreaking research project to help them eliminate the lasting effects of their injuries.
The neural substrates underlying speech perception are still not well understood. Previously, we found dissociation of speech and nonspeech processing at the earliest cortical level (AI), using speech and nonspeech complexity dimensions. Acoustic differences between speech and nonspeech stimuli in imaging studies, however, confound the search for linguistic– phonetic regions. Presently, we used sinewave speech (SWsp) and nonspeech (SWnon), which replace
Candidate brain regions constituting a neural network for preattentive phonetic perception were identified with fMRI and multivariate multiple regression of imaging data. Stimuli contrasted along speech/nonspeech, acoustic, or phonetic complexity (three levels each) and natural/synthetic dimensions. Seven distributed brain regions’ activity correlated with speech and speech complexity dimensions, including five left-sided foci [posterior superior temporal gyrus (STG), angular gyrus, ventral