How Do Common Marmosets Maintain the Balance Between Response Execution and Action Inhibition?

Area of Science:

• Neuroscience
• Cognitive Science
• Primate Research

Background:

• Cognitive control, balancing response execution and inhibition, is vital for socio-dynamic situations.
• Imbalances in inhibition are linked to neurodevelopmental and neuropsychological disorders.
• Comparative primate studies are essential for understanding cognitive control mechanisms.

Purpose of the Study:

• To characterize the behavioral inhibition capabilities of marmosets.
• To develop a reliable marmoset stop-signal task for assessing action inhibition with millisecond resolution.
• To establish a translational model for studying executive functions in marmosets.

Main Methods:

• Developed and implemented a novel marmoset stop-signal task.
• Utilized a performance-dependent tracking procedure to maintain ~50% accuracy on stop trials.
• Measured response time (RT) and stop-signal reaction time (SSRT) with millisecond resolution.
• Administered oxytocin to assess its effects on response execution and inhibition.

Main Results:

• Marmosets demonstrated high accuracy (≥70%) on Go trials and successfully performed Stop trials.
• Reliable SSRT estimates were obtained for the first time in marmosets, ranging from 677 to 1464 ms.
• The task proved suitable for examining executive functions, with oxytocin influencing response execution and inhibition.

Conclusions:

• The novel marmoset stop-signal task enables reliable, millisecond-resolution assessment of action inhibition.
• This model facilitates research into developmental changes in inhibition and the impact of various factors on executive functions.
• Marmosets serve as a valuable translational model for studying cognitive control and related deficits.