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The effect of midazolam on implicit memory tests.

E Hirshman¹, A Passannante, A Henzler

¹Department of Psychology, University of North Carolina, Chapel Hill 27599-3270, USA. ellioth@email.unc.edu

Brain and Cognition

|December 10, 1999

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Midazolam, a sedative, impacts both explicit and implicit memory. While it reduces performance on both, the effect is more pronounced on explicit memory, complicating its use in studying implicit memory.

Area of Science:

Cognitive Neuroscience
Psychopharmacology

Background:

Distinct forms of explicit and implicit memory are supported by empirical evidence.
Methodological challenges, including explicit memory contamination and issues with amnesiac subjects, hinder the study of memory processing.
Midazolam, a benzodiazepine, is explored for its potential to selectively affect memory types.

Purpose of the Study:

To investigate whether midazolam produces selective effects on explicit versus implicit memory.
To assess the utility of midazolam as a tool for studying implicit memory.
To understand the impact of midazolam on different memory systems.

Main Methods:

An experiment was conducted using free recall, fragment completion, and perceptual identification tests.
Midazolam was administered to participants to assess its effects on memory performance.

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Pharmacokinetic properties of midazolam were considered to minimize sedative effects.

Main Results:

Midazolam diminished memory performance across both implicit and explicit memory tests.
The reduction in memory performance was proportionally larger for explicit memory compared to implicit memory.
These findings suggest a non-selective impact of midazolam on memory.

Conclusions:

Midazolam affects both explicit and implicit memory, with a greater impact on explicit memory.
The use of midazolam to study implicit memory is constrained by its effects on explicit memory.
Further research is needed to clarify the selective or non-selective effects of benzodiazepines on memory processes.