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What-Where-When Memory in the Rodent Odor Span Task.

Carrie L Branch1, Mark Galizio1, Katherine Bruce1

  • 1University of North Carolina Wilmington, 601 S. College St., Wilmington, NC 28403.

Learning and Motivation
|September 23, 2014
PubMed
Summary
This summary is machine-generated.

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Rodents

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Cognitive Science

Background:

  • The Odor Span Task (OST) assesses rodent working memory.
  • OST performance is influenced by odor identity (What) and time since reinforcement (When).

Purpose of the Study:

  • To investigate if rodents can incorporate spatial location (Where) into OST performance.
  • To determine if the OST can assess episodic-like memory in rodents.

Main Methods:

  • A modified Odor Span Task (OST) was used, incorporating a "Where" dimension.
  • Rats were exposed to target scents in a holding cage before OST sessions (What-Where-When condition).
  • Control probes assessed familiarity and timing effects on scent discrimination.

Main Results:

Keywords:
Odor Span Taskepisodic-like memoryolfactory scentsrats

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  • Rats treated pre-session scents as novel during the OST, showing performance similar to baseline.
  • Control conditions indicated rats could discriminate based on familiarity and timing.
  • Adding reinforcement for pre-session scent presentation did not alter these findings.

Conclusions:

  • Rodent performance on the OST is influenced by stimulus identity (What), location (Where), and timing (When).
  • The OST-probe methodology shows potential for studying episodic-like memory in non-human subjects.