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A novel delayed non-match to sample object recognition task that allows simultaneous in vivo microdialysis
Jouni Ihalainen1, Timo Sarajärvi, Susanna Kemppainen
1A.I. Virtanen Institute, University of Kuopio, Kuopio, Finland. Jouni.Ihalainen@uef.fi
Journal of Neuroscience Methods
|April 17, 2010
Summary
This study introduces a new method combining object recognition memory tests with in vivo microdialysis. Findings show hippocampal acetylcholine release increases during memory tasks, offering a tool for studying memory and neurotransmitters.
Area of Science:
- Neuroscience
- Cognitive Science
- Pharmacology
Background:
- Object recognition memory is crucial for daily function.
- Assessing memory alongside neurotransmitter activity requires integrated methods.
- Hippocampal acetylcholine (ACh) is implicated in memory processes.
Purpose of the Study:
- To present a modified delayed non-match to sample (DNMS) paradigm.
- To enable simultaneous assessment of object recognition memory and in vivo microdialysis.
- To investigate hippocampal ACh release during a recognition memory task.
Main Methods:
- Modification of the delayed non-match to sample (DNMS) paradigm.
- Integration with simultaneous in vivo microdialysis.
- Measurement of hippocampal acetylcholine (ACh) release.
Main Results:
- Hippocampal ACh release increased from baseline during environmental exploration.
- A significant further increase in hippocampal ACh release was observed during recognition memory task performance.
- The modified paradigm successfully allowed simultaneous measurement of neurotransmitter levels and memory performance.
Conclusions:
- The novel experimental model effectively combines memory assessment with neurochemical analysis.
- This model provides a valuable tool for studying the impact of lesions or drugs on memory and neurotransmitter function.
- It facilitates a deeper understanding of the role of hippocampal ACh in object recognition memory.
