Representation-mediated Aversion as a Model to Study Psychotic-like States in Mice

Area of Science:

• Neuroscience
• Psychiatry
• Animal Models

Background:

• Schizophrenia research often focuses on cognitive and negative symptoms in rodent models.
• Studying the pathophysiology of positive symptoms in schizophrenia remains challenging.
• Representation-mediated learning offers a potential avenue for modeling positive symptoms.

Purpose of the Study:

• To develop and describe a novel mouse task for modeling positive psychotic-like states.
• To adapt a sensory preconditioning task to assess "reality testing" in mice.
• To investigate mental sensory representations and their alterations.

Main Methods:

• Adapted a sensory preconditioning task in mice.
• Utilized associations between neutral stimuli (odor, taste) and selective devaluation.
• Measured accuracy of mental representations of reality ("reality testing").

Main Results:

• The developed mouse task allows for the study of "reality testing" impairments.
• This task models alterations in perception relevant to positive psychotic states.
• Demonstrated the utility of sensory preconditioning for studying mental representations.

Conclusions:

• The described mouse task is a valuable tool for modeling positive psychotic-like states in schizophrenia research.
• This model facilitates the study of perceptual alterations associated with positive symptoms.
• Further research can utilize this paradigm to explore schizophrenia pathophysiology.