The ultimate intra-/extra-dimensional attentional set-shifting task for mice.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Executive control and cognitive flexibility deficits are key in neuropsychiatric diseases.
• Current rodent models for attentional set-shifting are limited, hindering translational research.
• Established human and primate tasks include the Wisconsin Card Sorting Test and Cambridge Neuropsychological Test Automated Battery ID/ED task.

Purpose of the Study:

• To develop a novel, operant-based rodent task that mimics primate attentional set-shifting tests.
• To establish a preclinical tool for investigating executive dysfunction in mouse models.

Main Methods:

• Development of a two-chamber, operant-based Intra-/Extra-Dimensional (ID/ED) set-shift task for mice, named 'Operon'.
• Utilized genetic manipulations (COMT enzyme activity) and pharmacological agents (phencyclidine) to test task sensitivity.

Main Results:

• The Operon task successfully measured attentional set shifting in mice.
• Reduced catechol-O-methyltransferase activity selectively improved extradimensional shift abilities.
• Phencyclidine impaired extradimensional shift and decreased response latency.

Conclusions:

• The ID/ED Operon task is a viable preclinical tool for drug testing and genetic screening in psychiatric research.
• This task can help elucidate the biological underpinnings of executive dysfunction and cognitive symptoms in psychiatric disorders.
• Findings may bridge the gap between rodent and human studies on cognitive flexibility.