Abstract
Visual perceptual load has been shown to modulate brain activation to emotional facial expressions. However, it is unknown whether cross-modal effects of visual perceptual load on brain activation to threat-related auditory stimuli also exist. The current fMRI study investigated brain responses to angry and neutral voices while subjects had to solve an easy or a demanding visual task. Although the easy visual condition was associated with increased activation in the right superior temporal region to angry vs. neutral prosody, this effect was absent during the demanding task. Thus, our results show that cross-modal perceptual load modulates the activation to emotional voices in the auditory cortex and that high visual load prevents the increased processing of emotional prosody.
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