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Neural architecture of choice behaviour in a concurrent interval schedule
Tobias Kalenscher1, Bettina Diekamp, Onur Güntürkün
1Institute of Cognitive Neuroscience, Ruhr-University Bochum, GAFO 05-623, 44780 Bochum, Germany. Tobias.Kalenscher@ruhr-uni-bochum.de
The European Journal of Neuroscience
|November 19, 2003
Summary
The neostriatum caudolaterale (NCL) in pigeons integrates reward timing to guide choice behavior. Inactivating the NCL disrupted temporal reward expectancy, affecting response patterns and goal shifting.
Area of Science:
- Neuroscience
- Behavioral Psychology
- Animal Cognition
Background:
- Concurrent interval schedules are key for studying choice behavior.
- Understanding the neural underpinnings of decision-making in pigeons is crucial.
Purpose of the Study:
- To investigate the neural basis of choice behavior under concurrent interval schedules.
- To determine the role of the neostriatum caudolaterale (NCL), caudate-putamen, and nucleus accumbens in reward-based decision-making.
Main Methods:
- Pigeons were trained on a concurrent fixed interval schedule with differential rewards.
- Reversible inactivation of NCL, caudate-putamen, and nucleus accumbens using tetrodotoxin.
- Detailed analysis of choice behavior, response distribution, and temporal modulation.
Main Results:
- NCL inactivation impaired temporal modulation of pecking frequency and switching patterns.
- Caudate-putamen blockade caused a complete behavioral cessation.
- Nucleus accumbens inactivation reduced operant behavior without affecting consummatory responses.
Conclusions:
- The NCL integrates reward expectancy to guide response selection and goal management.
- The NCL likely influences motor command execution via projections to the caudate-putamen.
- Distinct roles for NCL, caudate-putamen, and nucleus accumbens in choice behavior and action execution were identified.
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