Reduced multisensory integration of self-initiated stimuli.

The processing and perception of stimuli is altered when these stimuli are not passively presented but rather are actively triggered, or "self-initiated", by the participants. For unimodal stimuli, perceptual changes in stimulus timing and intensity have been demonstrated. Initial results have suggested that self-initiation may affect multisensory processing as well.

The role of auditory cortex in the spatial ventriloquism aftereffect.

Cross-modal recalibration allows the brain to maintain coherent sensory representations of the world. Using functional magnetic resonance imaging (fMRI), the present study aimed at identifying the neural mechanisms underlying recalibration in an audiovisual ventriloquism aftereffect paradigm. Participants performed a unimodal sound localization task, before and after they were exposed to adaptation blocks, in which sounds were paired with spatially disparate visual stimuli offset by 14° to the right.