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Related Experiment Videos

Memory for object features versus memory for object location: a positron-emission tomography study of encoding and

A M Owen1, B Milner, M Petrides

  • 1Montreal Neurological Institute, McGill University, QC, Canada.

Proceedings of the National Academy of Sciences of the United States of America
|August 20, 1996
PubMed
Summary

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This study reveals distinct brain networks for remembering object features versus locations. Memory for features involves ventral temporal and prestriate cortices, while location memory engages dorsal prestriate and parietal areas.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Understanding the neural basis of human memory is crucial for cognitive science.
  • Differentiating brain regions involved in memory for object attributes versus spatial relationships is an ongoing area of research.

Purpose of the Study:

  • To investigate the distinct neural substrates underlying memory for object features and object locations.
  • To compare brain activation patterns during encoding and retrieval for these two types of memory.

Main Methods:

  • Positron-emission tomography (PET) was used to measure regional cerebral blood flow.
  • Participants performed two encoding and two retrieval tasks comparing memory for object features and object locations.

Main Results:

Related Experiment Videos

  • Retrieval of object features, compared to locations, showed increased blood flow in ventral temporal and prestriate cortices.
  • Retrieval and encoding of object locations were associated with activation in dorsal prestriate and posterior parietal cortices.
  • Encoding tasks showed preferential activation in the left frontal lobe, while retrieval tasks activated the right frontal lobe.

Conclusions:

  • Memory for object features is mediated by a distributed system including ventral prestriate and inferior temporal cortices.
  • Memory for object locations is supported by a distinct system involving dorsal prestriate and parietal cortices.
  • Encoding and retrieval processes engage different frontal lobe regions.