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Assessment of Social Cognition in Non-human Primates Using a Network of Computerized Automated Learning Device ALDM Test Systems
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[Basal Ganglia Circuit Mechanisms in Cognitive Learning].

Takatoshi Hikida, Tom MacPherson, Makiko Morita

    Nihon Shinkei Seishin Yakurigaku Zasshi = Japanese Journal of Psychopharmacology
    |November 30, 2018
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    Summary
    This summary is machine-generated.

    The nucleus accumbens direct pathway is key for learning, while the indirect pathway enables behavioral flexibility and strategy changes. This research offers insights into compulsive behaviors like addiction.

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    Area of Science:

    • Neuroscience
    • Behavioral Neuroscience
    • Systems Neuroscience

    Background:

    • The nucleus accumbens (NAc), a key component of the basal ganglia, is vital for motivation, learning, and cognition.
    • NAc outputs are processed via parallel direct and indirect pathways, influencing behavior.

    Purpose of the Study:

    • To investigate the distinct roles of the NAc direct and indirect pathways in learning and behavioral flexibility.
    • To elucidate the basal ganglia circuit mechanisms underlying adaptive and maladaptive behaviors.

    Main Methods:

    • Development of a reversible neurotransmission blocking (RNB) technique using a transmission-blocking tetanus toxin.
    • Selective blockade of NAc direct (D-RNB) and indirect (I-RNB) pathways.
    • Assessment of learning and flexibility using cross-maze (visual cue, reversal) and IntelliCage (place discrimination, serial reversal) tasks.

    Main Results:

    • The NAc direct pathway is critical for initial learning acquisition.
    • The NAc indirect pathway is essential for learning flexibility and acquiring new strategies.
    • The NAc indirect pathway suppresses previously learned strategies during reversal learning, promoting behavioral flexibility.

    Conclusions:

    • Distinct roles of NAc direct and indirect pathways in learning and behavioral flexibility are elucidated.
    • These findings provide insights into the neural basis of compulsive behaviors, such as addiction and obesity.
    • Understanding these basal ganglia circuits can inform therapeutic strategies for related disorders.