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This YouTube Video Could Help Cure Vertigo

The idea that YouTube could help with any medical disorder sounds outrageous. But in the case of benign paroxysmal positional vertigo (BPPV), treatment through YouTube is entirely possible.

That's because the treatment of BPPV usually involves moving your head in a specific manner in order to realign the calcium crystals in your ear. When these crystals, known as otoliths, are out of place, they distort your perception of motion; by realigning them, you can cure your vertigo.

While you might not want to jump onto YouTube to seek out treatments for most disorders, the video above and the four other top videos for curing BPPV follow the exact maneuver developed and recommended by the American Academy of Neurology.

[via io9]

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Experts Say Trying to Force Yourself to Be Happy Doesn't Work
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A new study published in the Journal of Personality and Social Psychology finds that people who accept their difficult emotions are better off in the long run than those who try to force their way into a better mood.

Many psychologists and meditation teachers endorse a practice called radical acceptance. The basic idea is that when something bad happens—say, a dear friend moves away—you have two options. You can either deny or fight that reality, or you can accept it, deal with the loss, and move on. Or, to put it a different way: Pain is inevitable, but suffering, like the kind caused by denial, is optional.

Radical acceptance works because it teaches practitioners to accept reality and hard situations. Could the same framework help with hard emotions like anger, sadness, and grief? 

To find out, psychologists conducted three separate studies. The first was an online survey, in which 1003 people described how they related to their emotions. Participants were asked how strongly they agreed or disagreed with statements like "I tell myself I shouldn't be feeling the way that I'm feeling."

The second study took place in the lab and was framed as a mock job interview. The researchers told 156 people that they would be giving a speech extolling their job skills and qualifications. They were told the taped speech would be shown to a panel of judges as part of a mock job application. Then they were given two minutes to prepare. 

The last study invited 222 people to spend two months journaling about tough moments in their lives. Six months later, the researchers surveyed these people to see how they were feeling.

All three experiments yielded the same basic result: People who let themselves feel their feelings were, on average, less stressed, anxious, and depressed than those who tried to avoid or control them. 

"We found that people who habitually accept their negative emotions experience fewer negative emotions, which adds up to better psychological health," senior author Iris Mauss of UC Berkeley said in a statement. 

"Maybe if you have an accepting attitude toward negative emotions, you're not giving them as much attention," Mauss said. "And perhaps, if you're constantly judging your emotions, the negativity can pile up."

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The Body
13 Intriguing Facts About the Sciatic Nerve

The human body is an amazing thing. For each one of us, it's the most intimate object we know. And yet most of us don't know enough about it: its features, functions, quirks, and mysteries. Our series The Body explores human anatomy, part by part. Think of it as a mini digital encyclopedia with a dose of wow.

If you say someone's getting on your nerves, you could just cut to the chase and say they're getting on your sciatic nerve—this nerve is plenty big enough for both minor and major irritations. It's the largest nerve in the body, running a lengthy route from each side of your lower spine, deep into your buttock, wrapping around to the back of the thigh and into the foot. Mental Floss spoke to Loren Fishman, medical director of Manhattan Physical Medicine and Rehabilitation in NYC and associate clinical professor at Columbia Medical School. Here are 13 things we learned about this important part of the nervous system.

1. AT ITS LARGEST POINT, IT'S ABOUT AS BIG AROUND AS A MAN'S THUMB.

No wonder this nerve hurts when it gets irritated—at its biggest point, it's one heck of a large nerve, says Fishman. 

2. THE SCIATIC NERVE IS ACTUALLY MADE UP OF FIVE NERVES.

The sciatic nerve is more accurately five nerves that come together on the right and left sides of the lower spine. Technically, the fourth and fifth lumbar nerves and the first three nerves in the sacral spine come together and merge into the unified sciatic.

3. WITHOUT SCIATIC NERVES, YOUR LEGS WOULD BE WEAK NOODLES.

"The sciatic nerve gives feeling and strength to the muscles and skin of the calf and foot, supplies sensation from the joints, bones, and just about everything else below the knee," says Fishman.

4. THE SPINAL CORD'S CONNECTED TO THE THIGH BONE.

The nerve connects the spinal cord with the outside of the thigh, the hamstring muscles in the back of the thigh, and the muscles in your lower leg and feet. This is why sciatic nerve impingement often results in muscle weakness, numbness and/or tingling in the leg, ankle, foot, and toes.

5. INJURIES TO THE SCIATIC NERVE OFTEN AFFECT THE CONNECTION TO THE BRAIN RATHER THAN THE NERVE ITSELF.

After severe spinal cord injury, the nerve itself is often just fine, but the connection between it and the brain has been severed, Fishman says. Until now, there's been no way to fix such injuries, but "recent work with stem cells has begun to restore the connection in dogs and other animals."

6. BACK INJURIES ARE THE MOST COMMON CAUSE OF SCIATIC PAIN.

A variety of lower back problems can lead to pain that radiates along the sciatic nerve. Most commonly, sciatica pain is caused when a herniated disc at the L5 (lower lumbar back) irritates the S1 (sacrum) nerve root in the lower spine. The exiting nerve roots are highly sensitive, and the bits of the disc that herniate contain inflammatory proteins such as interleukin and tumor necrosis factor that can also aggravate the nerve.

7. SCIATIC PAIN CAN BE A MEDICAL EMERGENCY.

In a small number of people, a condition called cauda equina syndrome (so named because the nerve bundle at the base of the spinal cord resembles a horse's tail) can masquerade as sciatica—but it also usually causes weakness that extends to bowel or bladder incontinence and sometimes weakness or loss of sensation in the legs that gets progressively worse. In this case, immediate medical attention should be sought, and recovery may not be as quick as with common sciatica.

8. ANCIENT GREEKS AND ROMANS COULDN'T DISTINGUISH BETWEEN JOINT AND NERVE PAIN …

When the ancient Greek and Roman physicians were treating the pain we now commonly know as sciatica, they believed it stemmed from "diseases of the hip joint," according to a 2007 study in Spinal Cord. It wasn't until 1764, write the authors, "that leg pain of 'nervous' origin was distinguished from pain of 'arthritic' origin."

9. …AND HIPPOCRATES TREATED IT WITH THE BOILED MILK OF A FEMALE ASS.

Among the many treatments Hippocrates and his ilk came up with for this painful condition were: "Fumigations, fasting, and subsequently, laxatives, and ingestion of boiled milk of the female ass." In his Treatise of the Predictions, Hippocrates noted that elderly patients with "cramps and colds at the loin and the legs" would experience their pain for up to a year, whereas young people could be free of pain in about 40 days.

10. SCIATICA DERIVES ITS NAME FROM THE 15TH CENTURY.

The modern name for the disease, according to Fishman, comes from 15th-century Florence. "They called sciatica ischiatica, since they thought it came from tuberculosis that worked its way down to the ischial tuberosity (the sit-bones)," Fishman says. These medieval doctors had the cause wrong, but the name stuck.

11. SOMEWHERE BETWEEN 1900 AND 1925 PHYSICIANS CONNECTED HERNIATED DISCS TO SCIATIC PAIN.

Different researchers in different countries began to make sciatic breakthroughs when doing autopsies on corpses with fractured or herniated discs, where they noticed compression on the sciatic nerve.

12. WEIGHT HAS LITTLE INFLUENCE ON SCIATIC PAIN, BUT HEIGHT DOES.

A 1991 cross sectional study of 2946 women and 2727 men published in Spine found that neither gender nor body mass made any difference in the likelihood of developing sciatica. Body height did, however, in males between the ages of 50 and 64, with taller men being more likely to have the condition. Other studies have found a similar link [PDF]. Over 5'8"? Your risk is higher. 

13. SUFFERING FROM SCIATICA? YOU'RE NOT ALONE.

Sciatica has a surprisingly common negative impact on daily life. "Low back pain and sciatica are the second biggest reason for lost days of work—just behind the common cold," says Fishman. The condition is most commonly found in people over 50 and rarely seen in anyone under 20 years old—and then it most often has a genetic cause.

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