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Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
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Autobiographical memory, future imagining, and the medial temporal lobe.

Adam J O Dede1,2, John T Wixted2, Ramona O Hopkins3,4,5

  • 1Veterans Affairs San Diego Healthcare System, San Diego, CA 92161.

Proceedings of the National Academy of Sciences of the United States of America
|November 9, 2016
PubMed
Summary

Patients with medial temporal lobe (MTL) damage can construct autobiographical narratives, especially with support. Their memory impairment primarily affects narrative coherence, not content generation for the remote past or future.

Keywords:
anterograde amnesiahippocampusremote memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Memory Research

Background:

  • Autobiographical memory relies on the medial temporal lobe (MTL).
  • Anterograde amnesia can impact narrative construction.
  • Previous studies show mixed results regarding MTL and autobiographical memory.

Purpose of the Study:

  • To investigate autobiographical narrative production in patients with MTL damage.
  • To examine the role of anterograde memory in narrative construction.
  • To clarify the contribution of MTL to remote past and future event recall.

Main Methods:

  • Two experiments involving patients with MTL damage and healthy controls.
  • Participants produced narratives about past and future events.
  • Experiment 2 used supportive questioning to aid narrative construction.

Main Results:

  • Patients with MTL damage produced fewer episodic details than controls.
  • Anterograde memory impairment hindered narrative coherence.
  • Supportive questioning improved narrative detail production and aided recall of distant past events.

Conclusions:

  • MTL structures are not essential for remote past/future narrative construction, barring anterograde amnesia effects.
  • Narrative deficits in MTL patients are linked to anterograde memory impairment.
  • Variations in patient brain damage explain differing findings in autobiographical memory research.