9 medical reasons your short-term memory is getting worse

Short-term memory is the type of memory you need to accomplish your immediate goals, explains Dr Patrick Lyden, chair of the department of neurology at Cedars-Sinai Hospital. That may be working your way through tasks during the workday, remembering someone’s name, email, or phone number, or recalling where you tossed your keys when you got home.

When someone rattles off their phone number, you file it away in brain circuits that include the hippocampus (your memory centre) and the amygdala (your emotional hub). Depending on how important the short-term memory item may be (your address, someone you call all the time), it can be converted into long-term memory, says Dr Lyden.

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Short-term memory isn’t just about being able to quickly recall new info; there are three phases. “You have to register the information, store the information, and retrieve the information,” says Dr Lyden. Registering means that you’re paying attention in the first place. Storing the info means you’ve filed it away in your brain. Retrieval is the ability to access the memory again. Any of these steps can break down, he says.

Many people assume they have a memory problem when the explanation is something else entirely, says Dr Lyden. Maybe you’re not paying attention because you’re gazing at your phone or texting, for example. The first step to figuring out if something is going on is to “pay closer attention,” he says. Repeat the new information three times to commit it to memory.

If you can’t pass the “pay attention test” despite repeating the information, your next step, advises Dr Lyden, is to determine if your problem is storing new memories or retrieving them. If you’re having a problem remembering a new acquaintance’s name, ask them to give you three choices – like Carrie, Lauren, or Janet. If your problem is storing new memories, you won’t be able to remember. But if your problem is retrieval, you’ll remember that her name is Janet once you hear the correct name.

Having trouble with retrieving a short-term memory isn’t as serious as being unable to store them. “The storage problem is a serious problem, and you should see a neurologist,” he says.

Blood flow is good for your brain – it keeps it young. “Exercising boosts blood flow to your brain. If you stay active, you’ll have a better memory,” says Dr Daniel G. Amen, author of Memory Rescue: Supercharge Your Brain, Reverse Memory Loss, and Remember What Matters Most. Dr Lyden suggests daily exercise and it doesn’t have to be intense. “A one-kilometre run daily is better than a 10-kilometre run one day a week,” he says.

According to Dr Amen, marijuana a toxin that impairs memory. “Marijuana lowers every area of the brain and ages it. On average, pot smokers have brains three years older than non-smokers,” he says. Alcohol abuse can also harm your memory.

People tend to miss their own depression. But if you’re suffering from depression, anxiety, or chronic stress, get help or your memory can also pay the price. “These conditions may all hurt the brain,” says Dr Amen. Getting relief will not only improve your life and outlook but save your brain.

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When considering short-term memory loss causes, poor sleep is a big one. “If you don’t sleep seven hours a night or more, you’ll be in trouble. Your brain cleans itself at night. When you don’t get enough, it’s like the garbage collectors didn’t come to clean up,” says Dr Amen.

Before you panic, there’s some good news: “The vast majority of people who are healthy will not have a degenerative neurological condition causing short-term memory loss,” says Dr Lyden. But dementia or Alzheimer’s is a possibility in some groups. If you’re over 60 and have risk factors like diabetes, high blood pressure, or obesity, then you may be more prone to problems and need to be evaluated, he says.

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