Precuneus-prefrontal Activity During Awareness of Visual Verbal Stimuli

Conscious Cogn. 2001 Sep;10(3):356-65. doi: 10.1006/ccog.2001.0509.

Abstract

Awareness is a personal experience, which is only accessible to the rest of world through interpretation. We set out to identify a neural correlate of visual awareness, using brief subliminal and supraliminal verbal stimuli while measuring cerebral blood flow distribution with H(2)(15)O PET. Awareness of visual verbal stimuli differentially activated medial parietal association cortex (precuneus), which is a polymodal sensory cortex, and dorsolateral prefrontal cortex, which is thought to be primarily executive. Our results suggest participation of these higher order perceptual and executive cortical structures in visual verbal awareness.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Awareness / physiology*
  • Cerebrovascular Circulation / physiology
  • Female
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Prefrontal Cortex / anatomy & histology
  • Prefrontal Cortex / blood supply
  • Prefrontal Cortex / physiology*
  • Speech*
  • Tomography, Emission-Computed
  • Visual Perception / physiology*