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The Induction of Long-Term Potentiation at Amygdalo-Hippocampal Synapses in Vivo
Open accessAbstract
Electrical stimulation of the basolateral amygdala (BLA) evoked synaptic potentials in the dentate gyrus (DG) of the hippocampus in anesthetized rats. To determine if this pathway possesses synaptic plasticity, we investigated the impact of several conditions of high-frequency stimulation on BLA-DG synaptic potentials in these rats. Application of two trains of 100-pulse, 100-Hz stimulation or theta-burst stimulation to the BLA reproducibly induced long-term potentiation (LTP) of BLA-DG synaptic potentials. Paired-pulse facilitation was unchanged during LTP, suggesting that postsynaptic mechanisms are involved in the expression of LTP. In addition, the induction of LTP was not affected by the N-methyl-D-aspartate (NMDA) receptor antagonist 2-amino-5-phosphonovalerate, suggesting that activation of NMDA receptors is not required. This novel form of LTP should be a valuable model for elucidating neural mechanisms underlying the formation of emotional memory.
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The great enhancement and durability of memory for the details of arousing experiences is produced in part by the rapid induction of neuroplasticity in the hippocampus in phase 1, mediated by arousal-related afferents, including the amygdala, hypothalamus, ventral tegmental area, and locus coeruleus.
“We hypothesize that the great enhancement and durability of memory for the details of arousing experiences is produced in part by the rapid induction of neuroplasticity in the hippocampus in phase 1 (Figure 3), mediated by arousal-related afferents, including the amygdala (Abe [18]; Roozendaal et al. [315]; Abe et al. [316]; Richter-Levin [20]; McGaugh [88]; Akirav and Richter-Levin [22]),”
From The Temporal Dynamics Model of Emotional Memory Processing: A Synthesis on the Neurobiological Basis of Stress-Induced Amnesia, Flashbulb and Traumatic Memories, and the Yerkes-Dodson Law (2007) · cites this paper as Abe et al. [316]
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NMDA-Receptor-Independent Long-Term Potentiation
Johnston, D., Williams, S., Jaffe, D., & Gray, R. (1992) · Annual Review of Physiology · doi:10.1146/annurev.ph.54.030192.002421 · Cited by 300
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Diamond, D. M., Campbell, A. M., Park, C. R., Halonen, J., & Zoladz, P. R. (2007) · Neural Plasticity · doi:10.1155/2007/60803 · Cited by 762
Metadata
- Authors
- Abe, K., Niikura, Y., & Misawa, M.
- Affiliations
- Hoshi University (JP)
- Venue
- Biological and Pharmaceutical Bulletin
- Publisher
- Pharmaceutical Society of Japan
- Published
- 2003
- Volume
- 26
- Issue
- 11
- Pages
- 1560-1562
- ISSN
- 0918-6158 (ISSN-L)
- 1347-5215
- OpenAlex
- W2055919134
- Cited by
- 20
- References
- 1
- Citations by year
- 2023: 1 · 2021: 1 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 1
- FWCI
- 0.58
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Biological and Pharmaceutical Bulletin (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- long-term potentiation, basolateral amygdala, dentate gyrus, synaptic plasticity, theta burst stimulation, paired-pulse facilitation, NMDA receptor, emotional memory, high-frequency stimulation
- MeSH terms
- Amygdala, Animals, Electric Stimulation, Hippocampus, Male, Synapses, Rats, Wistar, Long-Term Potentiation, Excitatory Amino Acid Antagonists, Rats
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