Neural components of topographical representation

Proc Natl Acad Sci U S A. 1998 Feb 3;95(3):839-46. doi: 10.1073/pnas.95.3.839.

Abstract

Studies of patients with focal brain damage suggest that topographical representation is subserved by dissociable neural subcomponents. This article offers a condensed review of the literature of "topographical disorientation" and describes several functional MRI studies designed to test hypotheses generated by that review. Three hypotheses are considered: (i) The parahippocampal cortex is critically involved in the acquisition of exocentric spatial information in humans; (ii) separable, posterior, dorsal, and ventral cortical regions subserve the perception and long term representation of position and identity, respectively, of landmarks; and (iii) there is a distinct area of the ventral occipitotemporal cortex that responds maximally to building stimuli and may play a role in the perception of salient landmarks. We conclude with a discussion of the inferential limitations of neuroimaging and lesion studies. It is proposed that combining these two approaches allows for inferences regarding the computational involvement of a neuroanatomical substrate in a given cognitive process although neither method can strictly support this conclusion alone.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • Agnosia / physiopathology
  • Animals
  • Brain / anatomy & histology
  • Brain / pathology
  • Brain / physiology*
  • Brain / physiopathology
  • Brain Mapping*
  • Head Injuries, Closed / pathology
  • Head Injuries, Closed / physiopathology*
  • Humans
  • Magnetic Resonance Imaging
  • Maze Learning / physiology*
  • Models, Neurological
  • Space Perception / physiology*
  • Temporal Lobe / anatomy & histology
  • Temporal Lobe / physiology