A comparison of visual and auditory motion processing in human cerebral cortex. Cereb Cortex 2000 Sep;10(9):873-88
Date
09/13/2000Pubmed ID
10982748DOI
10.1093/cercor/10.9.873Scopus ID
2-s2.0-0033816826 (requires institutional sign-in at Scopus site) 317 CitationsAbstract
Visual and auditory motion information can be used together to provide complementary information about the movement of objects. To investigate the neural substrates of such cross-modal integration, functional magnetic resonance imaging was used to assess brain activation while subjects performed separate visual and auditory motion discrimination tasks. Areas of unimodal activation included the primary and/or early sensory cortex for each modality plus additional sites extending toward parietal cortex. Areas conjointly activated by both tasks included lateral parietal cortex, lateral frontal cortex, anterior midline and anterior insular cortex. The parietal site encompassed distinct, but partially overlapping, zones of activation in or near the intraparietal sulcus (IPS). A subsequent task requiring an explicit cross-modal speed comparison revealed several foci of enhanced activity relative to the unimodal tasks. These included the IPS, anterior midline, and anterior insula but not frontal cortex. During the unimodal auditory motion task, portions of the dorsal visual motion system showed signals depressed below resting baseline. Thus, interactions between the two systems involved either enhancement or suppression depending on the stimuli present and the nature of the perceptual task. Together, these results identify human cortical regions involved in polysensory integration and the attentional selection of cross-modal motion information.
Author List
Lewis JW, Beauchamp MS, DeYoe EAAuthor
Edgar A. DeYoe PhD Adjunct Professor in the Radiology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Acoustic StimulationAdult
Attention
Auditory Cortex
Cerebral Cortex
Discrimination Learning
Eye Movements
Female
Fixation, Ocular
Humans
Male
Memory
Middle Aged
Motion Perception
Neural Inhibition
Occipital Lobe
Parietal Lobe
Perceptual Masking
Photic Stimulation
Pitch Perception
Sound Localization
