Laughter Really Is the Best Medicine
A growing body of research suggests that laughter can really benefit your health. From improving immune function to lowering blood pressure, a good guffaw is good medicine.
What's the Latest Development?
A new study out of Oxford University suggests that laughter can trigger the release of endorphins, the brain chemical that can make you feel good, distract you from pain and deliver other health benefits. In the study, participants watched sitcoms or stand up comedy, either alone or with others, and were then subjected to pain threshold tests like wearing an ice-cold sleeve around their arm. Those who had laughed out loud with others for 15 minutes experienced a 10 percent increase in their pain threshold.
What's the Big Idea?
Laughing is an energetic activity that "stirs up all of our physiological systems. . .involving strong vocalization, an increase in heart rate and blood pressure and muscle contractions all over the body," says Robert Provine, a neuroscientist at the University of Maryland Baltimore County. Laughter also serves an important social function: bringing people together as a community. Evolutionary biologists say the sound of laughter comes from the "huh-huh" sound heard during the rough-and-tumble play of primates.
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It's one of the most consistent patterns in the unviverse. What causes it?
- Spinning discs are everywhere – just look at our solar system, the rings of Saturn, and all the spiral galaxies in the universe.
- Spinning discs are the result of two things: The force of gravity and a phenomenon in physics called the conservation of angular momentum.
- Gravity brings matter together; the closer the matter gets, the more it accelerates – much like an ice skater who spins faster and faster the closer their arms get to their body. Then, this spinning cloud collapses due to up and down and diagonal collisions that cancel each other out until the only motion they have in common is the spin – and voila: A flat disc.
It turns out, that tattoo ink can travel throughout your body and settle in lymph nodes.
In the slightly macabre experiment to find out where tattoo ink travels to in the body, French and German researchers recently used synchrotron X-ray fluorescence in four "inked" human cadavers — as well as one without. The results of their 2017 study? Some of the tattoo ink apparently settled in lymph nodes.
Image from the study.
As the authors explain in the study — they hail from Ludwig Maximilian University of Munich, the European Synchrotron Radiation Facility, and the German Federal Institute for Risk Assessment — it would have been unethical to test this on live animals since those creatures would not be able to give permission to be tattooed.
Because of the prevalence of tattoos these days, the researchers wanted to find out if the ink could be harmful in some way.
"The increasing prevalence of tattoos provoked safety concerns with respect to particle distribution and effects inside the human body," they write.
It works like this: Since lymph nodes filter lymph, which is the fluid that carries white blood cells throughout the body in an effort to fight infections that are encountered, that is where some of the ink particles collect.
Image by authors of the study.
Titanium dioxide appears to be the thing that travels. It's a white tattoo ink pigment that's mixed with other colors all the time to control shades.
The study's authors will keep working on this in the meantime.
“In future experiments we will also look into the pigment and heavy metal burden of other, more distant internal organs and tissues in order to track any possible bio-distribution of tattoo ink ingredients throughout the body. The outcome of these investigations not only will be helpful in the assessment of the health risks associated with tattooing but also in the judgment of other exposures such as, e.g., the entrance of TiO2 nanoparticles present in cosmetics at the site of damaged skin."
Do you have a magnetic compass in your head?
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