The results confirm that vowel normalization begins in auditory cortex at an early point in the hierarchy of speech processing.
The sensitivity of phase locking in auditory areas to speech intelligibility suggests that regions that are anatomically early in the hierarchy of speech processing show sensitivity to linguistic information.
This has led to the suggestion that voice pitch and mean formant frequency (MFF) are extracted early in the hierarchy of hearing/speech processing and used to normalize the internal representation of vowel sounds.
The stronger BOLD response in L2a correlates with its central place in the hierarchy of ascending processing stages found in the auditory telencephalon [46].
The LCD model proposes that word recognition is achieved by a hierarchy of processing stages that occur in a strictly feedforward manner.
47– 49 The finding in WS of ERP impairment across the hierarchy of auditory processing could potentially underlie the language deficits recognized in these patients.
Previous data [44], [45] also support the hierarchy of feature processing seen in the current study, demonstrating the ability of human subjects to rapidly and accurately identify changes in color apart from variations in other stimulus attributes of multi-feature stimuli.
The ACC is near the top of the hierarchy of brain processing.
We thus conclude that, at least in the rat neocortex, hierarchy of processing does not predict the degree of change in relative metabolic rate for NREMS.
In the hierarchy of need, Mr. Robins suggests starting there.
