Post List

  • July 13, 2011
  • 04:55 AM

Muscular forces shape bone circumference

by Elazar Zelzer in the Node

The massive cow femur I keep on a shelf right in front of me in my office clearly demonstrates that the shaft of a long bone is anything but a straight, smooth, symmetric tube. It is unevenly flattened and covered with ridges and grooves, bulges and depressions. This extremely intricate topography matches perfectly with adjacent [...]... Read more »

Amnon Sharir, Tomer Stern, Chagai Rot, Ron Shahar, & Elazar Zelzer. (2011) Muscle force regulates bone shaping for optimal load-bearing capacity during embryogenesis. Development, 138(15), 3247-3259. info:/10.1242/dev.063768

Kahn, J., Shwartz, Y., Blitz, E., Krief, S., Sharir, A., Breitel, D., Rattenbach, R., Relaix, F., Maire, P., & Rountree, R. (2009) Muscle Contraction Is Necessary to Maintain Joint Progenitor Cell Fate. Developmental Cell, 16(5), 734-743. DOI: 10.1016/j.devcel.2009.04.013  

  • July 13, 2011
  • 04:51 AM

More pretty, ugly people

by sciencebase in Sciencebase Science Blog

On Monday I posted a Youtube clip revealing a weird perception phenomenon in which even the prettiest girl seems to appear, fleetingly, as if she were an ogre or a troll. Take a look at the ugly pretty girl phenomenon here. I’m never satisfied to simply echo what others have said, so contacted co-discoverer of [...]More pretty, ugly people is a post from: Sciencebase Science Blog
... Read more »

Caputo, G. (2010) Strange-face-in-the-mirror illusion. Perception, 39(7), 1007-1008. DOI: 10.1068/p6466  

  • July 13, 2011
  • 03:56 AM

The Brain Is Not Made of DNA

by Neuroskeptic in Neuroskeptic

A new paper claims to have found A novel functional brain imaging endophenotype of autism.They used fMRI to show that the brains of teenagers with autism showed no activation differences to looking at smiling happy faces, or afraid faces, compared to unemotional ones. In teens without autism, there was strong activation in many emotional and face-related brain regions. The unaffected brothers and sisters of the autistic people showed intermediate effects.This is a fine study. The finding that si........ Read more »

  • July 13, 2011
  • 03:39 AM

Less than 1% of Amazonia is made of Terra Preta. Is that enough?

by Umberto in Up and Down in Moxos

I’ve just read a review written by William Balée (2010) about the book ‘Amazonian Dark Earths: Origins, Properties, Management’. Balée considers that the discovery of Terra Preta is proof that people in pre-Columbian Amazonia, rather than adapting to environmental conditions, ‘created’ the environment they inhabited. This allowed the development of complex societies in the region regardless of environmental constraints (such as poor soils, floods, lack of protein...). People overcame........ Read more »

William Balée. (2010) Amazonian Dark Earths. Tipit´ı: Journal of the Society for the Anthropology of Lowland South America. info:/

  • July 13, 2011
  • 02:17 AM

Early Clinical Experience for Med Students

by Dr Shock in Dr Shock MD PhD

Dealing with emotions and even your own emotions in a stress full job as medical professional is still an underestimated skill. Dealing with emotions is a highly informal and implicit learning process, part of "the hidden curriculum". Dealing with emotions, your emotions is still something hidden, part of the socialization process instead of learning appropriate emotion skills training.

No related posts.... Read more »

Helmich, E., Bolhuis, S., Laan, R., & Koopmans, R. (2011) Early clinical experience: do students learn what we expect?. Medical Education, 45(7), 731-740. DOI: 10.1111/j.1365-2923.2011.03932.x  

  • July 12, 2011
  • 08:15 PM

What IS lupus, anyway?

by NerdyOne in Try Nerdy

“It’s always lupus.”

I’ve watched enough episodes of House, M.D. (and it doesn’t take many) to know that when Dr. Gregory House and his medical team try to nail down each episode’s tricky medical condition, they often suggest a diagnosis of lupus along the way to the right answer.

I’m not unashamed to admit that until recently I couldn’t actually answer the question, “What is lupus?”…. Can you?... Read more »

  • July 12, 2011
  • 08:00 PM

"They're doing WHAT?!" Revisiting ridiculed research

by NerdyOne in Try Nerdy

Fruit flies in France. Bear DNA in Montana. Catfish genome mapping in Alabama. The way some politicians tell it, taxpayers are footing the bill for a lot of really stupid research. But before you take their word for it, why not read on and do your own research so you can make that call for yourself?... Read more »

  • July 12, 2011
  • 05:11 PM

Normal people more likely to recover from depression (probably)

by Tom Rees in Epiphenom

Patients who participate in medical trials are rarely asked about their religious beliefs, so we should be grateful for any studies that do. Here's one, and it's a study of citalopram (sold as Cilexa and Cipromil), which is a modern antidepressant - a bit like Prozac.

So they got religion info on 148 patients out of the 300-odd who took part in the trial (they were a slightly unusual bunch - 64% black, 64% women, and 79% single). And they asked them about their 'Religious well-being' (i.e. whet........ Read more »

  • July 12, 2011
  • 05:07 PM

Cadence and injuries: Once more, with science

by Dave Munger in Science-Based Running

The plan for this site has always been to supplement discussion of peer-reviewed science with other reasoned discussions based on anecdotes and experience. When I’m discussing the peer-reviewed research, I always include the Research Blogging icon you see at the top of this post. When I’m discussing books or other non-peer-reviewed sources, I don’t. That [...]... Read more »

  • July 12, 2011
  • 04:12 PM

Face off

by Africa Gomez in BugBlog

Ectemnius wasps are skilled fly hunters. Not only they hunt flies, but some species specialise in hoverflies, those masters of controlled flight. Like their prey, Ectemnius wasps are able to hover. As their large eyes suggest, they hunt visually and inspect flower patches that hoverflies frequent, hovering a bit, changing body direction, inspecting their terrain thoroughly. Once they detect a hoverfly, they try to approach from behind, and when at about 10 cm they aim and attack. Ectemnius provi........ Read more »

Justh, E., & Krishnaprasad, P. (2006) Steering laws for motion camouflage. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 462(2076), 3629-3643. DOI: 10.1098/rspa.2006.1742  

Mizutani, A., Chahl, J., & Srinivasan, M. (2003) Insect behaviour: Motion camouflage in dragonflies. Nature, 423(6940), 604-604. DOI: 10.1038/423604a  

  • July 12, 2011
  • 04:00 PM

Rats, Bees, and Brains: The Death of the “Cognitive Map”

by Jason Goldman in The Thoughtful Animal

Humans, just like all other animals, face the same problem every day: how do we get around the world? I don’t mean how do we walk, swim, crawl, or fly. I mean, how do we navigate? If I leave in search of food, how do I find my way back home? ... Read more »

Tolman, E. (1948) Cognitive maps in rats and men. Psychological Review, 55(4), 189-208. DOI: 10.1037/h0061626  

O'Keefe J, & Speakman A. (1987) Single unit activity in the rat hippocampus during a spatial memory task. Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale, 68(1), 1-27. PMID: 3691688  

Simons, D., & Wang, R. (1998) Perceiving Real-World Viewpoint Changes. Psychological Science, 9(4), 315-320. DOI: 10.1111/1467-9280.00062  

  • July 12, 2011
  • 12:42 PM

Drive a lot? Housing density may not be to blame

by Tim De Chant in Per Square Mile

Pushing high density living may seem like a good way to get people out of their cars—saving them money, curbing emissions, and reducing oil dependence—but densification may not be a silver bullet, according to one recent study. The authors dug into the National Household Transportation Survey to examine per household vehicle ownership rates, vehicle miles [...]... Read more »

  • July 12, 2011
  • 12:34 PM

It's Magnetic Moment Season: Measuring Various g-Factors

by Chad Orzel in Uncertain Principles

Among the articles highlighted in this week's Physics is one about a new test of QED through a measurement of the g-factor of the electron in silicon ions. This comes on the heels of a measurement of proton spin flips (this includes a free PDF) a couple of weeks ago, and those, in turn, build on measurements of electrons from a few years back, which Jerry Gabrielse talked about at DAMOP. Evidently, it's magnetic moment season in the world of physics.

The media reports on the proton experiment t........ Read more »

Sturm, S., Wagner, A., Schabinger, B., Zatorski, J., Harman, Z., Quint, W., Werth, G., Keitel, C., & Blaum, K. (2011) g Factor of Hydrogenlike ^{28}Si^{13 }. Physical Review Letters, 107(2). DOI: 10.1103/PhysRevLett.107.023002  

Ulmer, S., Rodegheri, C., Blaum, K., Kracke, H., Mooser, A., Quint, W., & Walz, J. (2011) Observation of Spin Flips with a Single Trapped Proton. Physical Review Letters, 106(25). DOI: 10.1103/PhysRevLett.106.253001  

  • July 12, 2011
  • 11:57 AM

“Eye of newt” reverses a long-held scientific dogma

by Sanford- Burnham in Beaker

Contrary to long-held belief, at least one animal (the newt) can continue to regenerate tissue even in old age—a finding that might help scientists understand why humans can’t, and allow them to do something about it.... Read more »

Eguchi, G., Eguchi, Y., Nakamura, K., Yadav, M., Millán, J., & Tsonis, P. (2011) Regenerative capacity in newts is not altered by repeated regeneration and ageing. Nature Communications, 384. DOI: 10.1038/ncomms1389  

  • July 12, 2011
  • 11:52 AM

Is Bo Obama a Fraud?

by Elizabeth Preston in Inkfish

A hypoallergenic dog, we're told, is one that politely keeps its dander to itself and makes the air safer for allergy sufferers to breathe. Yet a new study claims to have debunked the whole notion of the allergy-friendly dog. Is this fair?Researchers from the Henry Ford Health System in Detroit studied a group of 173 homes that had both a baby and exactly one dog. After surveying each dog's owners about its breed, size, and how much time the dog spent indoors, the researchers collected a sample ........ Read more »

Charlotte E. Nicholas, M.P.H., Ganesa R. Wegienka, Ph.D., Suzanne L. Havstad, M.A., Edward M. Zoratti, M.D., Dennis R. Ownby, M.D., & Christine Cole Johson, Ph.D. (2011) Dog allergen levels in homes with hypoallergenic compared with nonhypoallergenic dogs. American Journal of Rhinology . info:/

  • July 12, 2011
  • 10:41 AM

Some musings on sustainability and obesity: focusing on BOTH physical activity & diet needed

by Megan Carter in Verdant Nation

There is no disputing that diet and physical inactivity are contributors to the obesity epidemic. A recent debate involving Drs Yoni Freedhoff and Bob Ross showed that both are important (I don’t think there was consensus in the audience as to who won). What I want to highlight in this post is that, from a sustainability perspective (see my previous post for a definition), it is a moot point to argue over the relative importance of each.Our food system has changed dramatically over the la........ Read more »

  • July 12, 2011
  • 10:32 AM

Transgenic mice susceptible to poliovirus

by Vincent Racaniello in virology blog

Yesterday I terminated the last remaining mice in my small colony, including the line of poliovirus receptor transgenic mice that we established here in 1990. Remarkably, I had never written about this animal model for poliomyelitis which has played an important role in the work done in my laboratory. While I was still working on [...]... Read more »

  • July 12, 2011
  • 10:10 AM

No Really – Sitting Is Killing You

by Travis Saunders, MSc, CEP in Obesity Panacea

Earlier this year I posted an infographic on the health impact of sedentary behaviour which has generated plenty of discussion both here and elsewhere.  Many people are understandably skeptical about the relationship between sedentary behaviour and mortality, so I was excited about the recent publication of two recent systematic reviews focusing on just this issue.
The first, published in the American Journal of Preventive Medicine by Karin Proper and colleagues, focused on the prospective a........ Read more »

Proper, K., Singh, A., van Mechelen, W., & Chinapaw, M. (2011) Sedentary Behaviors and Health Outcomes Among Adults. American Journal of Preventive Medicine, 40(2), 174-182. DOI: 10.1016/j.amepre.2010.10.015  

  • July 12, 2011
  • 09:27 AM

New Exercise Guidelines Add Neuromotor Domain

by William Yates, M.D. in Brain Posts

Article first published as New Exercise Guidelines Are Here on Technorati.The American College of Sports Medicine (ACSM) recently published an update on their recommendations for exercise.  These guidelines follow an extensive review of the research literature and update guidelines that were previously published in 1998.The guidelines note four specific areas of exercise: cardiorespiratory fitness and reduction in risk of cardiovascular and metabolic disease, maintenance of muscul........ Read more »

  • July 12, 2011
  • 09:05 AM

Choosing your partner is only as helpful as the partners you have to choose from

by Jeremy Yoder in Denim and Tweed

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Picking teammates. Original photo by humbert15.When you need partners for some sort of cooperative activity—say, teammates for a game of kickball—you'd probably like to have a choice among several candidates. That lets you weigh considerations about kicking strength and running speed—and who promised to give you h........ Read more »

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