AFNI: software for analysis and visualization of functional magnetic resonance neuroimages
Computers and Biomedical Research
Graded Functional Activation in the Visuospatial System with the Amount of Task Demand
Journal of Cognitive Neuroscience
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To recognize phonemes across variation in talkers, listeners can use information about vocal characteristics, a process referred to as ''talker normalization.'' The present study investigates the cortical mechanisms underlying talker normalization using fMRI. Listeners recognized target words presented in either a spoken list produced by a single talker or a mix of different talkers. It was found that both conditions activate an extensive cortical network. However, recognizing words in the mixed-talker condition, relative to the blocked-talker condition, activated middle/superior temporal and superior parietal regions to a greater degree. This temporal–parietal network is possibly associated with selectively attending and processing spectral and spatial acoustic cues required in recognizing speech in a mixed-talker condition.