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Complex brain function in monkeys as a baseline for studying the effects of exogenous compounds
M G Paule1, G E Schulze, W Slikker
1Division of Reproductive and Developmental Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079.
Neurotoxicology
|January 1, 1988
Summary
This study characterized monkey behavior in a complex test battery assessing brain functions like learning and memory. Results show tasks monitor different brain systems and are uniquely affected by delta-9-tetrahydrocannabinol.
Area of Science:
- Neuroscience
- Behavioral Science
Background:
- Operant test batteries are crucial for studying complex cognitive functions in animal models.
- Understanding the neural basis of cognition requires validated behavioral assays.
Purpose of the Study:
- To characterize population performance in a complex operant test battery.
- To assess if different tasks within the battery reflect distinct brain functions.
- To investigate the differential sensitivity of these tasks to pharmacological challenges.
Main Methods:
- A cohort of 69 monkeys was tested on a battery of operant tasks.
- Tasks were designed to measure learning, memory, attention, time perception, discrimination, and motivation.
- A subset of animals received intravenous delta-9-tetrahydrocannabinol (THC) to assess task sensitivity.
Main Results:
- Performance across different operant tasks was not consistently correlated, suggesting they probe distinct neural systems.
- The various components of the test battery exhibited differential sensitivity to disruption by delta-9-tetrahydrocannabinol.
Conclusions:
- The operant test battery effectively differentiates between various cognitive functions mediated by distinct brain systems.
- This paradigm is suitable for studying the neuropharmacology of cognition, as demonstrated by the differential effects of THC.