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Healthy Living How To

Vanessa Rae Romero

Can Coffee Really Improve Memory?

January 21, 2014 By Healthy Living How To

Can Coffee Really Improve Memory? | healthylivinghowto.com

For some, it's the tradition of steeping tea leaves to brew the perfect cup of tea. For others, it's the morning shuffle to a coffee maker for a hot jolt of java. Then there are those who like their wake up with the kind of snap and a fizz usually found in a carbonated beverage.

Regardless of the routine, the consumption of caffeine is the energy boost of choice for millions to wake up or stay up. Now, however, researchers at the Johns Hopkins University have found another use for the stimulant: memory enhancer.

Michael Yassa, assistant professor of psychological and brain sciences in the Krieger School of Arts and Sciences at Johns Hopkins, and his team of scientists found that caffeine has a positive effect on long-term memory in humans. Their research, published by the journal Nature Neuroscience, shows that caffeine enhances certain memories at least up to 24 hours after it is consumed.

“We've always known that caffeine has cognitive-enhancing effects, but its particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans,” said Yassa, senior author of the paper. “We report for the first time a specific effect of caffeine on reducing forgetting over 24 hours.”

The Johns Hopkins researchers conducted a double-blind trial; which participants who did not regularly eat or drink caffeinated products received either a placebo or a 200-milligram caffeine tablet five minutes after studying a series of images. Salivary samples were taken from the participants before they took the tablets to measure their caffeine levels. Samples were taken again one, three and 24 hours afterwards.

The next day, both groups were tested on their ability to recognize images from the previous day's study session. On the test, some of the visuals were the same as from the day before, some were new additions and some were similar but not the same as the items previously viewed. More members of the caffeine group were able to correctly identify the new images as “similar” to previously viewed images versus erroneously citing them as the same.

Can Coffee Really Improve Memory? | healthylivinghowto.comThe brain's ability to recognize the difference between two similar but not identical items, called pattern separation, reflects a deeper level of memory retention, the researchers said.

“If we used a standard recognition memory task without these tricky similar items, we would have found no effect of caffeine,” Yassa said. “However, using these items requires the brain to make a more difficult discrimination — what we call pattern separation, which seems to be the process that is enhanced by caffeine in our case.”

The memory center in the human brain is the hippocampus, a seahorse-shaped area in the medial temporal lobe of the brain. The hippocampus is the switchbox for all short-term and long-term memories. Most research done on memory — the effects of concussions in athletics to war-related head injuries to dementia in the aging population — are focused on this area of the brain.

Until now, caffeine's effects on long-term memory had not been examined in detail. Of the few studies done, the general consensus was that caffeine has little or no effect on long-term memory retention.

The research is different from prior experiments because the subjects took the caffeine tablets only after they had viewed and attempted to memorize the images.

“Almost all prior studies administered caffeine before the study session, so if there is an enhancement, it's not clear if it's due to caffeine's effects on attention, vigilance, focus or other factors. By administering caffeine after the experiment, we rule out all of these effects and make sure that if there is an enhancement, it's due to memory and nothing else,” said Yassa.

According to the U.S. Food and Drug Administration, 90 percent of people worldwide consume caffeine in one form or another. In the United States, 80 percent of adults consume caffeine every day. The average adult has an intake of about 200 milligrams — the same amount used in the Yassa study — or roughly one strong cup of coffee or two small cups of coffee per day.

Yassa's team completed the research at Johns Hopkins before his lab moved to the University of California-Irvine at the start of this year.

“The next step for us is to figure out the brain mechanisms underlying this enhancement,” he said. “We can use brain-imaging techniques to address these questions. We also know that caffeine is associated with healthy longevity and may have some protective effects from cognitive decline like Alzheimer's disease. These are certainly important questions for the future.”

The lead author of the paper is Daniel Borota, an undergraduate student in Yassa's lab who received an undergraduate research award from Johns Hopkins to conduct the study.

Original Article Posted on Natural Blaze

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Filed Under: Healthy Body, Healthy Food Tagged With: brain, caffeine, coffee, memory, science & research

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ABOUT VANESSA

Hello, I'm Vanessa! I once had someone tell me they did not like my purple hair, said it was for the birds. My nickname is Birdie. Sometimes, The Bird. I am a Christ-follower, wife, mother, grandmother, business owner, city slicker, purple lover, and health nut. I blog about healthy living; from food freedom to financial freedom and everything in between.

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