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A multimodal cortical network for the detection of changes in the sensory environment.

Sensory stimuli undergoing sudden changes draw attention and preferentially enter our awareness. We used event-related functional magnetic-resonance imaging (fMRI) to identify brain regions responsive to changes in visual, auditory and tactile stimuli. Unimodally responsive areas included visual, auditory and somatosensory association cortex. Multimodally responsive areas comprised a right-lateralized network including the temporoparietal junction, inferior frontal gyrus, insula and left cingulate and supplementary motor areas. These results reveal a distributed, multimodal network for involuntary attention to events in the sensory environment. This network contains areas thought to underlie the P300 event-related potential and closely corresponds to the set of cortical regions damaged in patients with hemineglect syndromes.

Pubmed ID: 10700261

Authors

  • Downar J
  • Crawley AP
  • Mikulis DJ
  • Davis KD

Journal

Nature neuroscience

Publication Data

March 11, 2000

Associated Grants

None

Mesh Terms

  • Adolescent
  • Adult
  • Attention
  • Auditory Perception
  • Brain Mapping
  • Cerebral Cortex
  • Dominance, Cerebral
  • Event-Related Potentials, P300
  • Evoked Potentials, Somatosensory
  • Female
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Perceptual Disorders
  • Physical Stimulation
  • Touch
  • Visual Perception