Impulsive choice predicts poor working memory in male rats.

Area of Science:

• Neuroscience
• Behavioral Science

Background:

• Impulsive choice, preferring immediate rewards over larger delayed ones, is linked to maladaptive behaviors like substance abuse and obesity.
• Working memory deficits are common in individuals with these maladaptive behaviors, suggesting a potential cognitive link.

Purpose of the Study:

• To reevaluate the association between working memory and impulsive choice in rats.
• To investigate the relationship between cognitive control and decision-making under delay in a rodent model.

Main Methods:

• Utilized psychophysical adjusting procedures to quantify working memory (titrating-delay match-to-position) and impulsive choice (adjusting delay).
• 19 male Long-Evans rats were assessed and partitioned into low- and high-impulsive groups based on task performance.

Main Results:

• Rats with lower impulsivity demonstrated significantly better working memory performance.
• A negative correlation was observed between impulsive choice and working memory performance across all subjects.

Conclusions:

• Findings support the hypothesis that prefrontal cortex function, particularly working memory, is associated with impulsive choice.
• Future research should explore interventions targeting working memory to potentially mitigate impulsive behaviors.