RIGHT PARIETAL CORTEX IS INVOLVED IN THE PERCEPTION OF SOUND MOVEMENTIN HUMANS

Changes in the delay (phase) and amplitude of sound at the ears are cu es for the analysis of sound movement. The detection of these cues dep ends on the convergence of the inputs to each ear, a process that firs t occurs in the brainstem. The conscious perception of these cues is l ikely to involve higher centers. Using novel stimuli that produce diff erent perceptions of movement in the presence of identical phase and a mplitude modulation components, we have demonstrated human brain areas that are active specifically during the perception of sound movement. Both functional magnetic resonance imaging (fMRI) and positron emissi on tomography (PET) demonstrated the involvement of the right parietal cortex in sound movement perception with these stimuli.