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Memory modulation by post-training glucose or insulin remains evident at long retention intervals
1Laboratorio de Neurofarmacologia de Procesos de Memoria, Universidad de Buenos Aires, Argentina.
Neurobiology of Learning and Memory
|March 1, 1996
Summary
Post-training glucose administration enhances memory retention in mice, while insulin impairs it. These memory effects persist for up to one month, indicating long-term modulation of learning and memory.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Metabolic Neuroscience
Background:
- Memory consolidation is a critical process influenced by various physiological factors.
- Glucose and insulin play significant roles in brain function and energy metabolism.
- Understanding the impact of these substances on memory can offer insights into cognitive enhancement and disorders.
Purpose of the Study:
- To investigate the long-term effects of post-training glucose and insulin administration on memory retention.
- To determine if the modulatory effects of glucose and insulin on memory persist over extended periods.
Main Methods:
- Male Swiss mice were trained on a one-trial step-through inhibitory avoidance task.
- Immediate post-training intraperitoneal injections of alpha-D[+]-glucose or insulin were administered.
- Memory retention was assessed at 24 hours, 1 week, and 1 month post-training.
Main Results:
- Post-training glucose administration significantly facilitated memory retention at all tested intervals.
- Post-training insulin administration impaired memory retention at all tested intervals.
- The effects of both glucose and insulin on memory were consistent across short (24-h) and long (1 week, 1 month) retention periods.
Conclusions:
- Post-training administration of glucose and insulin can modulate memory consolidation.
- These modulatory effects on memory are long-lasting and evident even after one month.
- This suggests a significant role for glucose and insulin in the enduring processes of learning and memory.