health Archives | Page 4 of 15

Taghealth

Using Swarm Intelligence to Build Targeted Anti-Cancer Nano-Drugs

July 11, 2011 / Klint Finley

Nanoparticles and insect swarms

The results of Geoffrey von Maltzahn et al. in their Nature Materials publication reveal that nanoparticles that communicate with each other can deliver more than 40-fold higher doses of chemotherapeutics (anti-cancer drugs) to tumors than nanoparticles that do not communicate can deliver. These results show the potential for nanoparticle communication to amplify drug delivery over that achievable by nanoparticles that work alone, similar to how insect swarms perform better as a group than the individual insects do on their own.

Scientific American: Learning from Insect Swarms: Smart Cancer Targeting

(via Social Physicist)

5 Reasons Why Having a High IQ Ain’t All It’s Cracked-Up to Be

June 10, 2011 / Klint Finley

Odd John

Yes, it’s from Cracked, but it’s interesting:

#5.You’re Probably a Night Owl — And That’s a Bad Thing
#4.You’re Less Likely to Pass On Your Genes
#3. You’re More Likely to Lie
#2. You’re More Likely to Believe Bullshit
#1. You’re More Likely to Be Self-Destructive

Cracked: 5 Unexpected Downsides of High Intelligence

N-Back Training Exercise Still Holding Up in Tests

June 1, 2011 / Klint Finley

soakyourhead screenshot
Above: the Soak Your Head Dual N-Back Application

I’ve covered research on how most brain training exercises don’t actually hold-up in tests. The good news is that dual n-back training, also covered here previously, is continuing to hold up in tests:

Jonides, who is the Daniel J. Weintraub Collegiate Professor of Psychology and Neuroscience, collaborated with colleagues at U-M, the University of Bern and the University of Tapei on a series of studies with more than 200 young adults and children, demonstrating the effects of various kinds of n-back mental training exercises. The research was supported by the National Science Foundation and by the Office of Naval Research.

According to Jonides, the n-back task taps into a crucial brain function known as working memory—the ability to maintain information in an active, easily retrieved state, especially under conditions of distraction or interference. Working memory goes beyond mere storage to include processing information.

Medical Express: A Brain Training Exercise That Really Does Work

(Thanks Bill!)

Soak Your Head offers a free Web-based n-back training program, but it requires Microsoft Silverlight. You can find a list of other applications here.

Another way to boost your mental capabilities? Play first person shooters. This NPR story provides an overview of the research. You can also find a research paper that looks at multiple studies here (PDF).

The best way to stave off cognitive decline, however, may be to spend time socializing with friends.

THC Cuts Lung Cancer Tumors in Half, Study Finds

May 16, 2011 / Klint Finley

THC molecule illustration

Then, for three weeks, researchers injected standard doses of THC into mice that had been implanted with human lung cancer cells, and found that tumors were reduced in size and weight by about 50 percent in treated animals compared to a control group. There was also about a 60 percent reduction in cancer lesions on the lungs in these mice as well as a significant reduction in protein markers associated with cancer progression, Preet says.

Although the researchers do not know why THC inhibits tumor growth, they say the substance could be activating molecules that arrest the cell cycle. They speculate that THC may also interfere with angiogenesis and vascularization, which promotes cancer growth.

Preet says much work is needed to clarify the pathway by which THC functions, and cautions that some animal studies have shown that THC can stimulate some cancers. “THC offers some promise, but we have a long way to go before we know what its potential is,” she said.

Science Daily: Marijuana Cuts Lung Cancer Tumor Growth In Half, Study Shows

(via Socialphysicist)

Previously: Does Marijuana Shrink Tumors?

How Little Sleep Can You Get Away With?

April 18, 2011 / Klint Finley

Sleep

Almost everyone needs at least eight, and no you can’t train yourself to get by on less:

In what was the longest sleep-restriction study of its kind, Dinges and his lead author, Hans Van Dongen, assigned dozens of subjects to three different groups for their 2003 study: some slept four hours, others six hours and others, for the lucky control group, eight hours — for two weeks in the lab. […]

Not surprisingly, those who had eight hours of sleep hardly had any attention lapses and no cognitive declines over the 14 days of the study. What was interesting was that those in the four- and six-hour groups had P.V.T. results that declined steadily with almost each passing day. Though the four-hour subjects performed far worse, the six-hour group also consistently fell off-task. By the sixth day, 25 percent of the six-hour group was falling asleep at the computer. And at the end of the study, they were lapsing fives times as much as they did the first day.

New York Times: How Little Sleep Can You Get Away With?

(Via Barking Up the Wrong Tree)

There are a few people who get by on four or less hours per night, but they’re rare. There are a lot more people who think they need six or less, but actually need a full eight. This Wall Street Journal Article covers the “sleepless elite” and how rare they. Current research indicates that there’s no way to modify your sleep requirements – they’re genetic.

Coffee: The Original Smart Drug and Aphrodisiac

April 18, 2011 / Klint Finley

Coffee: Grounds for Debate, a title in the Philosophy for Everyone series, argues that coffee is a performance-enhancing drug for thinkers. “The appropriate analogy is that coffee and philosophy go together like foreplay and sex,” insist editors Scott F Parker and Michael W Austin. “You can have one without the other, but the latter is better with the former and the former often leads to the latter.” Philosopher Basam Romaya says: “With the use of coffee, critical thinking abilities are sharpened, attention to detail enhanced.” This is a venerable claim: in the 16th century, Sheik Abd-al-Kadir, an Arab scholar, said: “No one can understand the truth until he drinks of coffee’s frothy goodness.” […]

So what about impotence? That does seem to have been overstated. The Women’s Petition Against Coffee prompted a broadside from men who argued that it “makes the erection more Vigorous, the Ejaculation more full, adds spiritualescency to the Sperme”. Initially I wasn’t sure what “spiritualescency” means, either, until I read in this book that caffeine increases sperm motility. That said, some say coffee may harm the sperm while speeding it on its way, which makes a kind of sense.

The Guardian: Can coffee wreck your marriage?

(via James Governor)

More Happiness and Longevity Research: Working During Retirement is Good for You?

March 18, 2011 / Klint Finley

Slate has some coverage of the Longevity Project, a decades long research project tracking the lives of geniuses. This could just be propaganda to make us happier about the fact that many of us will never be able to retire, but it makes sense. I don’t want to spend my golden years eating TV dinners and watching Jeopardy reruns.

Retirement is usually seen as the severing of oneself from the work of a lifetime. Friedman, who is 60, dislikes this notion, and from his research he’s come to believe such an attitude is bad both for society and individuals. Of course, for those in miserable work situations, a departure can mean liberation. But most of the Terman males (given the attitudes of the times, far fewer of the women Termites worked) had solid, sometimes even exceptional careers. Interviews done with successful Termites in their 70s, several of them lawyers, showed a striking number continued to work part time.

For those who contemplate retirement as decades filled with leisure and relaxation, The Longevity Project serves as a warning. As Friedman says, “fun can be overrated” and stress can be unfairly maligned. Many study participants who lived vigorously into old age had highly stressful jobs. Physicist Norris Bradbury, who died at age 88, succeeded J. Robert Oppenheimer as director of the Los Alamos National Laboratory, overseeing the transition of the U.S. atomic weapons research lab from World War II into the Cold War.

Slate: Don’t Stop Working!

(via Alex Pang)

Top 9 Vegetarian Geniuses

February 25, 2011 / Klint Finley

Tesla

It’s a bad idea to fetishize intelligence, or to think that vegetarianism is going to make you a genius, but I found this list of famous vegetarian geniuses interesting:

Elephant Journal: The World’s Greatest Geniuses are Vegetarians!

And, because it’s bound to come up, here’s the Wikipedia entry on Hitler’s vegetarianism. Some question whether he was really a strict vegetarian, despite contemporaneous accounts.

New Evidence Suggests Neanderthals Cooked and Ate Vegetables

February 25, 2011 / Klint Finley

Neanderthal

Researchers in the US have found grains of cooked plant material in the teeth of the remains.

The study is the first to confirm that the Neanderthal diet was not confined to meat and was more sophisticated than previously thought.

The research has been published in the Proceedings of the National Academy of Sciences.

The popular image of Neanderthals as great meat eaters is one that has up until now been backed by some circumstantial evidence. Chemical analysis of their bones suggested they ate little or no vegetables.

BBC News: Neanderthals cooked and ate vegetables

New Study Fails to Prove That MDMA Causes Cognitive Impairment

February 15, 2011 / Klint Finley

obama ecstasy pills

In contrast to many prior studies, ecstasy users in the new study showed no signs of cognitive impairment attributable to drug use: ecstasy use did not decrease mental ability.

The resulting experiment whittled 1500 potential participants down to 52 carefully chosen ecstasy users, whose cognitive function was compared against 59 closely-matched non-users, with tests administered at several stages to make sure participants were telling the truth about their drug and alcohol use.

Science Daily: New Study Finds No Cognitive Impairment Among Ecstasy Users

A small sample size, but this study does not make the same errors that many other studies did.

Theme by Anders Norén — Up ↑

Technoccult

Mutate Your Mind