Cognitive phenotyping is becoming more and more important in terms of analyzing mouse models because cognitive deficits could be an early predictor for neuropsychiatric diseases. For large-scale functional mouse phenotyping, learning and memory tests are necessary which are as time-saving as possible and easily transferable to other laboratories.
The Object Recognition Test is a good option to this end, since the task can be performed in a short time span compared to e.g. operant conditioning procedures, which require training.
Memory for objects is defined by the ability of a mouse to distinguish an unfamiliar object from familiar objects after learning, i.e. the difference in exploration times between a previously encountered object and a novel object is taken as an index of memory performance.
The Object Recognition Test has been applied in many laboratories using different arenas, different objects and even different procedures. Contradictory results in all these tests might be due to discrepancies in performing the test. Therefore, the application of a well-established and targeted Object Recognition Procedure is recommended, with taking into consideration the possible results and their interpretation. I validated the Object Recognition Procedure by means of three basic tests, which were here called Object Preference Test, Counterbalance Test and Retroactive Interference Test. Male and female C57BL/6J mice displayed an intact object recognition memory after varying retention intervals of 3 hours, 24 hours, 48 hours, 72 hours and 7 days.
The established Object Recognition Test could be applied in three different mouse models. For a more detailed analysis of these mouse models, the Y-maze Spontaneous Alternation Test and the Social Discrimination Test were performed. The Y-maze Spontaneous Alternation Test refers to working memory, measured by the exploration of a Y-formed maze. The Social Discrimination Test is based on the discrimination of familiar and unfamiliar conspecifics and refers to social memory. Furthermore, I validated a food-rewarded Hole Board Test with the inbred strains C57BL/6J and Balb/c, which can be used to investigate working and reference memory.
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Cognitive phenotyping is becoming more and more important in terms of analyzing mouse models because cognitive deficits could be an early predictor for neuropsychiatric diseases. For large-scale functional mouse phenotyping, learning and memory tests are necessary which are as time-saving as possible and easily transferable to other laboratories.
The Object Recognition Test is a good option to this end, since the task can be performed in a short time span compared to e.g. operant conditioning p...
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