Amygdala oscillations and the consolidation of emotional memories

@article{Par2002AmygdalaOA,
  title={Amygdala oscillations and the consolidation of emotional memories},
  author={Denis Par{\'e} and Dawn R. Collins and J. Guillaume Pelletier},
  journal={Trends in Cognitive Sciences},
  year={2002},
  volume={6},
  pages={306-314}
}
The amygdala receives multi-modal sensory inputs and projects to virtually all levels of the central nervous system. Via these widespread projections, the amygdala facilitates consolidation of emotionally arousing memories. How the amygdala promotes synaptic plasticity elsewhere in the brain remains unknown, however. Recent work indicates that amygdala neurons show theta activity during emotional arousal, and various types of oscillations during sleep. These synchronized neuronal events could… 
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References

SHOWING 1-10 OF 76 REFERENCES
The amygdala: Neurobiological aspects of emotion, memory, and mental dysfunction.
Anatomical Organization of the Primate Amygdaloid Complex Distribution of Monoamines Within the Amygdala Neurophysiology and Functions of the Primate Amygdala Emotional Neurophysiology of the Human
Mechanisms of emotional arousal and lasting declarative memory
TLDR
Human-subject studies confirm the prediction of animal work that the amygdala is involved with the formation of enhanced declarative memory for emotionally arousing events and suggest that the amygdaloid complex serves to influence memory-storage processes in other brain regions.
Amygdala activity related to enhanced memory for pleasant and aversive stimuli
TLDR
It is shown that bilateral amygdala activity during memory encoding is correlated with enhanced episodic recognition memory for both pleasant and aversive visual stimuli relative to neutral stimuli, and that this relationship is specific to emotional stimuli.
Organization of intra-amygdaloid circuitries in the rat: an emerging framework for understanding functions of the amygdala
TLDR
These findings suggest that after the stimulus enters the amygdala, the highly organized intra-amygdaloid circuitries provide a pathway by which the representation of a stimulus becomes distributed in parallel to various amygdaloids nuclei.
Combinatorial amygdalar inputs to hippocampal domains and hypothalamic behavior systems
The expression of innate reproductive, defensive, and ingestive behaviors appears to be controlled by three sets of medial hypothalamic nuclei, which are modulated by cognitive influences from the
The anatomy, physiology and functions of the perirhinal cortex
  • W. Suzuki
  • Medicine, Psychology
    Current Opinion in Neurobiology
  • 1996
TLDR
These results are consistent with neuroanatomical research showing that this area has strong and reciprocal connections with widespread cortical sensory areas and with other memory-related structures, including the hippocampal formation and amygdala.
Theta Oscillations in the Hippocampus
TLDR
Theta oscillations represent the "on-line" state of the hippocampus and are believed to be critical for temporal coding/decoding of active neuronal ensembles and the modification of synaptic weights.
Cortical pathways to the mammalian amygdala
  • A. McDonald
  • Psychology, Medicine
    Progress in Neurobiology
  • 1998
TLDR
There is anatomical evidence which suggests that there are important differences in the extent of convergence of cortical projections in the primate versus the nonprimate amygdala.
The Amygdala : a functional analysis
1. The amygdala - what's happened in the last decade 2. Connectivity of the rat amygdaloid complex 3. Synaptic plasticity in the amygdala 4. Plasticity in the amygdala and kindling 5. The amygdala:
Reactivation of hippocampal ensemble memories during sleep.
TLDR
Recordings from large ensembles of hippocampal "place cells" in three rats showed that cells that fired together when the animal occupied particular locations in the environment exhibited an increased tendency to fire together during subsequent sleep, in comparison to sleep episodes preceding the behavioral tasks.
...
1
2
3
4
5
...