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Diazepam and memory: retrograde facilitation produced by interference reduction.

J V Hinrichs, M M Ghoneim, S P Mewaldt

    Psychopharmacology
    |January 1, 1984
    PubMed
    Summary
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    Diazepam (Valium) can surprisingly improve memory for past events, a phenomenon called retrograde facilitation. This occurs because the drug impairs new learning, which in turn reduces interference with older memories.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Pharmacology

    Background:

    • Diazepam (Valium) is known to impair new learning and memory (anterograde amnesia).
    • However, it can sometimes enhance retention of information learned before administration (retrograde facilitation).

    Purpose of the Study:

    • To investigate the conditions and magnitude of retrograde facilitation caused by diazepam.
    • To test hypotheses explaining this memory enhancement effect.

    Main Methods:

    • Three experiments were conducted to examine retrograde facilitation.
    • Hypotheses regarding differential effort, enhanced consolidation, and reduced interference were tested.

    Main Results:

    • Differential effort and enhanced consolidation hypotheses were not supported.

    Related Experiment Videos

  • Evidence favored the reduced interference interpretation.

    • Conclusions:

    • Retrograde facilitation of predrug memories by diazepam is attributed to reduced interference.
    • Impaired postdrug learning minimizes interference from new information, thereby preserving older memories.