Have you ever heard a song and instantly been transported somewhere else? Not just remembering a moment, but almost stepping back into it.
A certain smell reminding you of childhood. A place bringing back emotions you hadn’t thought about in years, or a song making you feel connected to a version of yourself you thought had disappeared.
These experiences can feel surprisingly powerful. Sometimes comforting. Sometimes emotional, or sometimes completely unexpected. According to Dr Charan Ranganath in Why We Remember, there’s a very good reason for that; Memory is deeply connected to context.
Memory doesn’t exist in isolation
We often think of memory as something stored neatly away, waiting to be retrieved when needed, but memory is much more interconnected than that.
When experiences are formed, the brain doesn’t just store the central event itself. It also stores elements of the surrounding context – the environment, emotions, sounds, smells, sensations, and even what was happening around us at the time.
This is what makes certain cues so powerful.
A particular song isn’t just a song.
It may also be connected to:
- a specific relationship
- a period of life
- a place
- a feeling
- or a version of ourselves we associate with that time
So when we encounter that cue again, the brain begins pulling connected pieces of experience back into awareness, sometimes almost instantly.
Why music feels so emotionally powerful
Music seems to have a particularly strong relationship with memory.
Many people can recall songs from adolescence or early adulthood with remarkable clarity, even when other details from that period feel distant or blurred.
Part of this is because music often becomes tied to emotionally significant moments. But it’s also because music tends to engage multiple systems in the brain at once: emotion, attention, rhythm, sensory processing, and autobiographical memory.
In Why We Remember, Dr Ranganath explores how contextual cues can unlock episodic memories – memories tied to specific experiences and moments in time.
Music appears to act as one of the strongest cues we have, which might explain why hearing a certain song can create such an immediate emotional shift, sometimes before we’ve even consciously recognised why.
The role of place and smell
Smell is another particularly powerful trigger for memory.
Unlike some other senses, smell has a very direct relationship with brain systems involved in emotion and memory processing. This is why certain scents can evoke vivid emotional memories almost immediately.
A perfume, freshly cut grass, a specific type of food.
Suddenly, you’re not just thinking about the past, you’re feeling connected to it.
Places can work in a similar way.Returning somewhere familiar can reactivate memories that seemed inaccessible before. Not because the memories were gone, but because the context that originally helped organise them has returned.
Dr Ranganath describes context as critical to memory. It acts almost like a framework the brain uses to organise experiences, which means that when the right context reappears, dormant memories can resurface too.
Nostalgia isn’t always simple
We often speak about nostalgia as something comforting, and sometimes it is.
Looking back can create a sense of connection, continuity, and identity. Certain memories remind us who we were, what mattered to us, and how we’ve changed over time, but nostalgia can also feel complicated.
Research discussed in Why We Remember suggests that for people already feeling lonely or disconnected, nostalgia can sometimes intensify those feelings rather than soothe them, which makes sense when we think about memory not just as recall, but as interpretation.
The emotional meaning of a memory changes depending on where we are in the present.
A memory that feels warm one day may feel painful another, not because the memory itself changed – but because we did.
Why some periods of life feel more vivid
You may also notice that certain years feel especially easy to revisit emotionally.
For many people, memories from adolescence and early adulthood feel more emotionally charged than memories from later periods of life. This is sometimes referred to as the “reminiscence bump”. During those years, identity is forming. Experiences often feel newer, more emotionally intense, and more connected to our developing sense of self.
So when music, places, or smells from that period reappear, they don’t just activate memory, they reconnect us to who we were becoming at the time.
Memory as connection
I think one of the most interesting ideas in Dr Ranganath’s work is that memory isn’t simply about preserving the past, it’s also about helping us maintain continuity with ourselves over time.
The things we remember, and the things that trigger those memories, help shape our understanding of who we are, where we’ve been, and what matters to us, which means these sudden moments of recall are often about more than memory alone.
Sometimes they’re about identity, emotion, meaning, or connection.
And perhaps that’s why they can feel so powerful, because for a brief moment, the distance between past and present becomes much smaller, and something that once felt far away suddenly feels close again.
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