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Related Experiment Videos

When encoding yields remembering: insights from event-related neuroimaging.

A D Wagner1, W Koutstaal, D L Schacter

  • 1Department of Psychology, Harvard University, Cambridge, MA 02138, USA. adwagner@nmr.mgh.harvard.edu

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|August 31, 1999
PubMed
Summary

Understanding human memory encoding requires examining neural activity differences. Event-related functional magnetic resonance imaging (fMRI) and event-related potentials (ERPs) help reveal why some experiences are remembered and others forgotten.

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Human Memory

Background:

  • Understanding memory formation is crucial for neuroscience.
  • Historically, lesion studies informed memory encoding research.
  • Functional neuroimaging now offers new insights into brain mechanisms of memory.

Purpose of the Study:

  • To review the contributions of PET and fMRI to memory encoding.
  • To emphasize event-related fMRI studies on the subsequent memory effect (Dm effect).
  • To integrate findings from fMRI and ERPs for a comprehensive understanding of memory encoding.

Main Methods:

  • Review of Positron Emission Tomography (PET) studies.
  • Analysis of functional Magnetic Resonance Imaging (fMRI) studies, particularly event-related fMRI.

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  • Examination of Event-Related Potentials (ERPs) literature.

    • Main Results:

    • Event-related fMRI allows trial-by-trial analysis of neural activity during encoding.
    • The Dm effect, neural activity differences related to subsequent memory, is a key focus.
    • Integration of high temporal resolution ERPs and high spatial resolution fMRI is promising.

    Conclusions:

    • Neuroimaging techniques like fMRI and ERPs significantly advance memory encoding research.
    • Understanding the Dm effect is vital for explaining memory success or failure.
    • Combining methodologies offers a more complete picture of the neural basis of memory.