Every December, without fail, the same phenomenon occurs: Christmas carols invade the shops, the streets, your playlist and, if you’re not careful, even your dreams, becoming one of those intrusive choruses that won’t leave you and keep repeating on a loop in your head.
And although some consider them cloying or repetitive, the truth is that these songs act as a bridge between the past and the present, triggering shared memories and emotions that envelop us in the Christmas spirit. What is it about them that makes them so popular Christmas after Christmas?
Music made to make us feel good
Let’s start with the basics: music directly influences our brain. It’s as if it has a priority lane that allows it to reach our limbic system (the area responsible for processing emotions) before reaching the prefrontal cortex (the more rational area).
Neuroscientists at McGill University have found that the amygdala responds in a unique way to music. This explains why we like some songs so much, even if their lyrics leave much to be desired: the initial emotional impact they have on us is usually the one that prevails.
Christmas carols, in particular, have two great characteristics that psychologically captivate us:
- Major tones that we automatically associate with joyful feelings
- Simple, repetitive, and catchy rhythms
This allows our brains to quickly recognize and anticipate musical patterns. In fact, a study published in the journal Nature found that familiar music stimulates the release of dopamine, which floods the striatum , a part of the brain linked to reward, motivation, and addiction.
The curious thing is that the dopamine level increases just a few seconds before the climax of the melody arrives, which means that our brain anticipates what will happen and enjoys it in advance, generating a feeling of pleasure and well-being that hooks us to that music.
Nostalgia, the “emotional memory” of Christmas
Nostalgia is another key ingredient in the “recipe” of Christmas carols. All music, in general, is deeply linked to our memories, but Christmas carols in particular often evoke classic Christmas scenes: family gatherings, gifts, lights, dinners, games, childhood…
That means that when we listen to “Jingle Bells” or “Silent Night”, we are not simply hearing a song, but we are activating a network of emotional memories that evoke that pleasant feeling of “coming home”, a place we associate with comfort and safety.
In fact, beyond personal memories, Christmas carols trigger collective nostalgia . They are melodies known by entire generations that are repeated every year with hardly any changes. This constant repetition creates what psychologists call the “mere exposure effect.” That is, the more familiar something is to us, the more it attracts us (although it should be clarified that for some it has the opposite effect, in which case Christmas music could affect emotional balance).
But for most of us, Christmas carols aren’t just songs; they’re part of a cultural ritual we’ve grown up with, one that, whether we like it or not, “hacks” our brains, activating pleasant memories that evoke nostalgia, familiarity, and security. That’s why Christmas carols sound like Christmas. And they’ll probably continue to be with us for a long time.
References:
Salimpoor, V. N. et. Al. (2011) Anatomically distinct dopamine release during anticipation and experience of peak emotion to music. Nature Neuroscience; 14: 257–262.
Blood, A. J. & Zatorre, R. J. (2001) Intensely pleasurable responses to music correlate with activity in brain regions implicated in reward and emotion. PNAS; 98(20): 11818–11823.
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