Study: Forget a Word? Make a Fist

Clenching a hand increases focal brain activity. Make sure to do it correctly, though.
More
make a fist main 570.jpg
moonwaves / flickr

PROBLEM: Sometimes a word is on the tip of your tongue, and it's so close a slight breeze would blow it out. But it doesn't come. Why? Maybe because you were sitting there with your hands just hanging open like a paper doll.

Making a fist with one hand has been shown to increase activity in the brain on the opposite site of your body about 90 seconds later. Right-hand clenching (which activates parts of the brain's left hemisphere) has been associated with experiencing emotions of the sort controlled by the left brain (those involved in "approach," e.g., happiness and anger). Left-hand clenching, meanwhile, is believed to bring on "withdrawal" emotions (e.g., sadness and anxiety). We also know that athletes perform better under pressure when they make a fist with their left hand. What other cognitive functions can we mess with by making fists?

METHODOLOGY: Researchers at Montclair State University led by Ruth Propper gave memory tests to 51 right-handed individuals -- they were right-handed in that they scored of 80 or higher on the Edinburgh Handedness Inventory, which exists. The subjects had to memorize and then recall words, which they did while clenching and relaxing their hands around a tiny pink ball in specific sequences.

RESULTS: People who memorized the words immediately after clenching their right hand and then recalled them immediately after clenching their left hand did the best. They did significantly better than people who did the reverse sequence. They did slightly better than the people who made no fists at all, "though not significantly so."

IMPLICATIONS: According to prior research, left prefrontal brain regions seem to be associated with encoding memories, while right prefrontal regions retrieve them. Purposely increasing activity in those parts of the brain logically could give these functions a little boost. The effect in this small study was minimal (and contested), but it's an interesting idea. Now we just need a trick to remember which fist to make when. (Right before left -- if you're right-handed. It could be opposite that if they tested left-handed people.) If you're having trouble remembering the sequence, I'm sure there's a simple, elegant memory trick you can do with your feet.


The full study, "Getting a Grip on Memory: Unilateral Hand Clenching Alters Episodic Recall" is published in PLOS One.

Jump to comments
Presented by

James Hamblin, MD, is a senior editor at The AtlanticHe is the host of If Our Bodies Could Talk.

 
 
More

Get Today's Top Stories in Your Inbox (preview)

CrossFit Versus Yoga: Choose a Side

How a workout becomes a social identity


Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register. blog comments powered by Disqus

Video

CrossFit Versus Yoga: Choose a Side

How a workout becomes a social identity

Video

Is Technology Making Us Better Storytellers?

The minds behind House of Cards and The Moth weigh in.

Video

A Short Film That Skewers Hollywood

A studio executive concocts an animated blockbuster. Who cares about the story?

Video

In Online Dating, Everyone's a Little Bit Racist

The co-founder of OKCupid shares findings from his analysis of millions of users' data.

Video

What Is a Sandwich?

We're overthinking sandwiches, so you don't have to.

Video

Let's Talk About Not Smoking

Why does smoking maintain its allure? James Hamblin seeks the wisdom of a cool person.

Writers

Up
Down

More in Health

Just In