Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 109, Issue 31, Pages 12764-12769Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1210797109
Keywords
goal-directed behavior; perseveration; transmission modulation; neurotransmission blockade; striatal neurons
Categories
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [2222005, 23120011, 23680034]
- Japan Science and Technology Agency Precursory Research for Embryonic Science and Technology Program
- Takeda Science Foundation
- Naito Foundation
- Senri Life Science Foundation
- Grants-in-Aid for Scientific Research [22220005, 23680034] Funding Source: KAKEN
Ask authors/readers for more resources
In the basal ganglia, inputs from the nucleus accumbens (NAc) are transmitted through both direct and indirect pathways and control reward-based learning. In the NAc, dopamine (DA) serves as a key neurotransmitter, modulating these two parallel pathways. This study explored how reward learning and its flexibility are controlled in a pathway-specific and DA receptor-dependent manner. We used two techniques (i) reversible neurotransmission blocking (RNB), in which transmission of the direct (D-RNB) or the indirect pathway (I-RNB) in the NAc on both sides of the hemispheres was selectively blocked by transmission-blocking tetanus toxin; and (ii) asymmetric RNB, in which transmission of the direct (D-aRNB) or the indirect pathway (I-aRNB) was unilaterally blocked by RNB techniques and the intact side of the NAc was infused with DA agonists or antagonists. Reward-based learning was assessed by measuring goal-directed learning ability based on visual cue tasks (VCTs) or response-direction tasks (RDTs). Learning flexibility was then tested by switching from a previously learned VCT to a new VCT or RDT. D-RNB mice and D1 receptor antagonist-treated D-aRNB mice showed severe impairments in learning acquisition but normal flexibility to switch from a previously learned strategy. In contrast, I-RNB mice and D2 receptor agonist-treated I-aRNB mice showed normal learning acquisition but severe impairments not only in the flexibility to the learning switch but also in the subsequent acquisition of learning a new strategy. D1 and D2 receptors thus play distinct but cooperative roles in reward learning and its flexibility in a pathway-specific manner.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available