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Facilitation of memory retrieval by centrally administered catecholamine stimulating agents
Behavioural Brain Research
|January 1, 1983
Summary
Dopamine agonists like D-amphetamine reversed amnesia for inhibitory avoidance learning in mice. This suggests central dopamine systems are crucial for retrieving learned avoidance behaviors.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Molecular Neuroscience
Background:
- Protein synthesis inhibitors, like anisomycin, can induce amnesia for learned tasks.
- Understanding memory retrieval mechanisms is crucial for addressing memory disorders.
Purpose of the Study:
- To investigate the role of central dopamine systems in the retrieval of inhibitory avoidance learning.
- To determine if dopamine or norepinephrine systems are involved in reversing anisomycin-induced amnesia.
Main Methods:
- Mice received inhibitory avoidance training followed by anisomycin injection to induce amnesia.
- Introcerebroventricular injections of various drugs (D-amphetamine, dopamine, lisuride, norepinephrine, clonidine) were administered before the retention test.
- Behavioral suppression was controlled for by using a different training apparatus.
Main Results:
- D-amphetamine, dopamine, and the dopamine agonist lisuride dose-dependently alleviated amnesia.
- Norepinephrine and the norepinephrine agonist clonidine did not reverse the amnesia.
- Findings were not due to non-specific behavioral suppression.
Conclusions:
- Central dopamine systems appear to play a significant role in the retrieval of inhibitory avoidance learning.
- Targeting dopaminergic pathways may offer therapeutic potential for memory retrieval deficits.