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Technique for assessing visual discrimination learning in mice.

T E Levine, R L Bornschein, I A Michaelson

    Pharmacology, Biochemistry, and Behavior
    |December 1, 1977
    PubMed
    Summary
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    A new automated method using nose-pokes effectively studies visual discrimination learning in mice. This technique is valuable for assessing how drugs and toxins impact learning and behavior in young and adult mice.

    Area of Science:

    • Behavioral Neuroscience
    • Animal Models
    • Cognitive Science

    Background:

    • Automated behavioral techniques are crucial for objective learning studies.
    • Nose-poke responses offer a reliable operant measure in rodents.
    • Assessing visual discrimination is key to understanding cognitive processes.

    Purpose of the Study:

    • To develop and validate an automated system for studying visual discrimination learning in mice.
    • To assess the utility of a nose-poke operant response for this paradigm.
    • To evaluate the learning capabilities of CD-1 mice in different discrimination tasks.

    Main Methods:

    • An automated apparatus was designed utilizing a nose-poke as the operant response.
    • CD-1 mice were tested on simultaneous and successive brightness discrimination tasks.

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  • An optimal intertrial interval (20 sec) was determined for simultaneous discrimination acquisition.
  • Reversal learning was assessed following initial discrimination acquisition.

    • Main Results:

    • The nose-poke response required no shaping and allowed measurement of exploratory behavior.
    • Mice acquired simultaneous brightness discrimination readily.
    • Successive brightness discrimination was more challenging for the mice.
    • Reversal learning proved to be a slow process in this paradigm.

    Conclusions:

    • The automated nose-poke technique provides a robust method for visual discrimination learning studies in mice.
    • This procedure is suitable for evaluating the effects of pharmacological and toxic agents on learning.
    • The method is applicable to both weanling and adult mice, offering versatility in research.