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Título del libro: Sleep, Cognition And Emotion: From Molecules To Social Ecology
Título del capítulo: Amygdala oscillations and plasticity during sleep

Autores UNAM:
ZEIDY VANESSA MUÑOZ TORRES; CORINNE JENNIFER MONTES RODRIGUEZ;
Autores externos:

Idioma:

Año de publicación:
2020
Palabras clave:

Amygdala; Emotion; Memory; Oscillations; Sleep; Synaptic plasticity


Resumen:

This chapter reviews the role of amygdala oscillations in emotional processing during sleep. Sleep is a dynamic global state during which organisms disconnect from the outside world, though intrinsic mechanisms continue to generate specific oscillations. It has been suggested that these patterns of neural activity may reorganize brain circuits to sharpen the meaning of experiences, consolidate memories and release unnecessary information from the system. A bidirectional relationship between emotion and sleep has been revealed by studies of neuropsychiatric disorders and sleep deprivation, while oscillations during Rapid Eye Movement sleep (REM) have been related to the consolidation and regulation of emotional information. Oscillations during non-REM sleep, in contrast, are associated with declarative and contextual memory consolidation. In both stages, amygdala oscillations may play a central role in consolidation fear memories through coherent activity with other brain structures involved in memory, like the hippocampus. It is well-known that sleep-dependent synaptic plasticity in the amygdala and hippocampus correlates with the correct acquisition, consolidation and retrieval of fear memories. While many studies show the hippocampus' central role in memory processes, the amygdala's influence on emotional memory processing in relation to sleep is little-explored to date; hence our understanding of underlying mechanisms is insufficient. This review analyzes amygdala oscillations during sleep as the brain mechanism that generates the plasticity associated with emotional memory processing. © 2020 by Nova Science Publishers, Inc. All rights reserved.


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