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The Funny in Your Mind

12/1/2012

4 Comments

 
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Have you ever asked yourselves what makes something funny? Why do we laugh when something is funny? What goes on in our brain when we hear something funny? Why do we seek the funny? Well, as it turns out neuroscientists have been hard at work in this area for a while using the most up to date technologies to answer these questions. One way to study these questions is to look at the areas of the brain that increase in activity while subjects listen to jokes. For this, scientists have used a technique called functional magnetic resonance imaging (fMRI) that can identify those regions of the brain that become more active in response to a stimulus.

In a recent study, scientists imaged the brain of volunteers who listened to jokes or non-jokes. The scientists also asked the subjects to complete a questionnaire to rate the level of "funniness" of what they heard. The results indicate that funny is not something that is localized to one structure in the brain. When what the subjects heard was funny, several dispersed structures in the brain were activated. Some of the structures like the amygdala, ventral striatum, and midbrain, are associated with the experience of positive reward. This means that "getting a joke" produces pleasure. The extent to which these areas were activated correlated with the subjective ratings of funniness that the participants ascribed to the jokes. The researchers could tell whether a person thought something was funny just by evaluating the increases in activity in these brain areas.

One interesting aspect of this study was the evaluation of jokes with semantic ambiguity. There is an area of the brain called the inferior frontal gyrus (IFG) that increases in activity when subjects are exposed to funny things. The IFG also becomes active when a person encounters semantic ambiguity. For example:

"What was the problem with the other coat? It was difficult to put on with the paint roller."

This sentence activates your IFG briefly because of the ambiguity associated with the word "coat" (a garment vs. a layer of paint). The IFG is a brain structure involved in resolving ambiguities. Now consider the following joke:

"Why don't cannibals eat clowns? Because they taste funny!"

When you listen to this joke, your IFG also becomes active in response to the ambiguity regarding the meaning of the word "funny" (odd or bad vs. amusing), but in this case the resolution of the ambiguity is more difficult than with the example about the coat. As a result of this your IFG remains active for a longer time. The authors of the study found that this increased activity of the IFG was an important component associated with the funniness of jokes with semantic ambiguity.

This study evaluated the neurological complexity behind something as seemingly mundane as finding a joke funny. Of course, when scientists study these processes they try to simplify things as much as possible to make them amenable to research. One aspect that was not evaluated is whether we find a joke funny when we are the object of the joke. For example if an author received a review of their book that stated:

"Your book was both good and original. Unfortunately the part that was good was not original and the part that was original was not good."

Would the author find that funny? I can't even begin to imagine how the brain scan would look!

What do you think? (Image courtesy of smokedsalmon)

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4 Comments
Adriene link
12/2/2012 10:25:09 pm

So the more difficult the ambiguity, the better the joke? Because I liked the clown joke the best!

Reply
Rolando link
12/3/2012 01:57:40 am

I'm not sure about more difficult, because you need to get the joke to find it funny, but certainly ambiguity makes for a more interesting joke. Thanks for your comment Adrienne!

Reply
Laura Zera link
12/13/2012 01:08:54 pm

Interesting. I bet this study could be useful in the context of understanding and treating depression. I heart science.

Reply
Rolando link
12/14/2012 01:42:52 am

Yes, the funny bone has a lot to do with combating depression too. If that power could be harnessed it would be great! Thanks for your comment Laura!

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