Differential effects of viewpoint on object-driven activation in dorsal and ventral streams

Neuron. 2002 Aug 15;35(4):793-801. doi: 10.1016/s0896-6273(02)00803-6.

Abstract

Using fMRI, we showed that an area in the ventral temporo-occipital cortex (area vTO), which is part of the human homolog of the ventral stream of visual processing, exhibited priming for both identical and depth-rotated images of objects. This pattern of activation in area vTO corresponded to performance in a behavioral matching task. An area in the caudal part of the intraparietal sulcus (area cIPS) also showed priming, but only with identical images of objects. This dorsal-stream area treated rotated images as new objects. The difference in the pattern of priming-related activation in the two areas may reflect the respective roles of the ventral and dorsal streams in object recognition and object-directed action.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Brain Mapping
  • Functional Laterality / physiology
  • Humans
  • Magnetic Resonance Imaging
  • Orientation / physiology*
  • Parietal Lobe / anatomy & histology
  • Parietal Lobe / physiology*
  • Pattern Recognition, Visual / physiology*
  • Photic Stimulation
  • Psychomotor Performance / physiology
  • Space Perception / physiology*
  • Temporal Lobe / anatomy & histology
  • Temporal Lobe / physiology*
  • Visual Cortex / anatomy & histology
  • Visual Cortex / physiology*
  • Visual Pathways / anatomy & histology
  • Visual Pathways / physiology*