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Emotional hangovers are seen in the brain for the first time – here's why they affect how you feel
We don't forget emotional experiences in a hurry, and they change how we see events in the future.
By Martha Henriques (Ibtimes)
Emotional experiences tend to linger and affect how we perceive new situations for a long time, a brain-scan study shows
We may all have had an emotional hangover at one point or another – whether it's struggling to get over a bad experience or reeling with happiness after a good one. Now scientists have mapped what goes on in the brain when one emotional experience affects how you feel about the events that follow.
Neuroscientists scanned the brains of people while they viewed an image that stirred them up emotionally and then when they viewed a neutral image about 12 to 30 minutes later. They found that the subjects' brain activity still showed echoes of the emotional experience when they viewed the second image.
Lasting emotions
Activity in several parts of the brain – the amygdala, hippocampus and medial temporal lobe – is linked to the formation and sticking power of emotional memories and it takes longer than was previously known for this activity to die down.
"Emotion is a state of mind," says study author Lila Davachi, of New York University's department of psychology and Center for Neural Science.
"These findings make clear that our cognition is highly influenced by preceding experiences and, specifically, that emotional brain states can persist for long periods of time."
This persistence is the key to how emotional hangovers work – it was known previously that emotional states could persist for a few seconds and affect how people process new information immediately after the experience. But this research shows that emotional hangovers last a lot longer than that.
"How we remember events is not just a consequence of the external world we experience, but is also strongly influenced by our internal states – and these internal states can persist and colour future experiences," Davachi says.
We're more likely to remember stirring experiences, too, as they are the most deeply impressed in our memory. An emotional hangover makes new memories more likely to stick, too, the study found.
The persisting emotional state made the participants in the study more likely to be able to recall the neutral image about six hours later – in other words, the emotional colouring of the second picture made it more memorable. Study participants who viewed the images the other way around – the neutral image before the emotional one – were less likely to remember the neutral image hours later.
The study is published in the journal Nature Neuroscience.
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