Research Article

Experimental Brain Research

, Volume 153, Issue 2, pp 140-145

First online:

FMRI evidence for a 'parietal reach region' in the human brain

  • Jason D. ConnollyAffiliated withCIHR Group on Action and Perception, Department of Psychology, University of Western Ontario
  • , Richard A. AndersenAffiliated withDivision of Biology, California Institute of Technology
  • , Melvyn A. GoodaleAffiliated withCIHR Group on Action and Perception, Department of Psychology, University of Western Ontario Email author 

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Abstract

Event-related functional magnetic resonance imaging was used to examine activation in the posterior parietal cortex when subjects made pointing movements or saccades to the same spatial location. One region, well positioned to be homologous to the monkey parietal reach region (PRR), responded preferentially during memory-delay trials in which the subject planned to point to a specific location as compared to trials in which the subject planned to make a saccade to that same location. We therefore conclude that activation in this region is related to specific motor intent; i.e. it encodes information related to the subject's intention to make a specific movement to a particular spatial location.

Keywords

fMRI Intention-related activity Posterior parietal cortex Reaching