An old song comes on the radio, and before you know it, you're singing every word. You may not have heard it in decades. Yet at a party, someone tells you their name, and a minute later it's gone. Why does the brain hang on to one and drop the other?
The short answer is that music and names are handled quite differently by memory. Researchers have found evidence that musical memory may be stored somewhat separately from ordinary language. Songs also come packed with repetition, melody, and emotion, while a new name is usually a single word heard once, with nothing to hold it in place.
Music Has Its Own Filing System
Scientists have noticed differences between how we remember language and how we remember music, which has led to the theory that musical memory may be encoded in its own way. Studies of people with damage to different parts of the brain suggest that the words of a song and its melody may even be stored with two separate memory codes.
Music also has a knack for unlocking personal memories. Researchers call these music-evoked autobiographical memories, and they are estimated to happen anywhere from once to a few times a day. In one early experiment, about 30 percent of the popular songs played to students brought back a personal memory.
Why the Songs of Your Youth Stick
If the songs you know best come from your teens and early twenties, you're not alone. Psychologists have found that adults over 40 tend to recall more memories from roughly ages 15 to 25 than from other periods. This is called the reminiscence bump, and memories triggered by music show it too.
Songs have long been used as memory tools. The most familiar example is how children learn the alphabet by singing the ABCs. Jingles work the same way, which is why advertisers love them.
Sometimes music sticks a little too well. About 98 percent of people get earworms, those catchy bits of music that loop in your head. They usually last 15 to 30 seconds, and songs with lyrics account for most of them.
The Trouble With Names
That frustrating feeling when a name is right there but won't come out has a name of its own: the tip-of-the-tongue state. It's a failure to retrieve a word, along with partial recall and a strong sense that it's about to pop up.
These moments become more common as we get older. Older adults generally report more tip-of-the-tongue states than younger adults. Reassuringly, research has found that frequent tip-of-the-tongue moments are not linked to dementia.
Timing matters too. Words learned early in life tend to be recalled more quickly and accurately, while words learned later are more likely to get stuck on the tip of the tongue. The names of people we meet as adults are, of course, learned late.
Music That Lasts a Lifetime
Music's staying power shows up even in illness. The brain areas involved with music are among the last to be affected as Alzheimer's disease progresses, and music memory can be preserved in some people with the disease. Results vary from person to person, though. If you have concerns about memory, talk to your doctor.
So the next time a name slips away but a 50-year-old chorus comes right back, go easy on yourself. Your brain isn't failing. It's just a much bigger music fan than it is a name collector.
