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Separable neuronal circuitries for manipulable and non-manipulable objects in working memory.

Axel Mecklinger1, Christin Gruenewald, Mireille Besson

  • 1Department of Psychology, Saarland University, Saarbrücken, Germany. mecklinger@mx.uni-saarland.de

Cerebral Cortex (New York, N.Y. : 1991)
|October 16, 2002
PubMed
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Visual working memory for manipulable objects activates motor programs in the brain. This suggests hand motor programs, like speech programs, aid in short-term object maintenance.

Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Human Brain Function

Background:

  • Perceiving or imagining object actions activates premotor cortex regions.
  • Previous studies linked object perception/imagination to action execution areas.

Purpose of the Study:

  • To investigate if similar brain regions activate during working memory maintenance of objects.
  • To examine the neural basis of visual working memory for manipulable objects.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used in human participants.
  • Participants maintained information about manipulable and non-manipulable objects in working memory.

Main Results:

  • Maintaining manipulable objects activated left ventral premotor cortex and Broca's area.

Related Experiment Videos

  • Non-manipulable objects activated Broca's area and left angular gyrus.
  • Manipulable objects selectively engaged ventral premotor cortex and anterior intraparietal sulcus.

    • Conclusions:

    • Visual working memory for manipulable objects relies on associated motor programs.
    • Hand motor programs may facilitate short-term object maintenance in working memory.
    • Findings suggest a link between action representation and object working memory.