Electrical activity of the human amygdala during all-night sleep and wakefulness

Several studies have established a close relationship between sleep and emotion (Deliens et al., 2014). In particular, rapid eye movement (REM) sleep has been implicated in emotion during dreams and nightmares (Desseilles et al., 2011; Ross et al., 1994), also in posttraumatic sleep disorder (Mellman et al., 2002), and in next day emotional regulation. For example, emotional reactivity to threatening images is exacerbated after selective REM sleep deprivation (Rosales-Lagarde et al., 2012), as are fear responses to previously extinguished stimuli (Spoormaker et al., 2012).

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