In an article in today's Nature, Uppsala researcher Martin Brazeau describes the skull and jaws of a fish that lived about 410 million years ago. The study may give important clues to the origin of jawed vertebrates, and thus ultimately our own evolution.
Brain
In 2002, a group of scientists at the University of Toronto was able to identify a gene which they dubbed DREAM (downstream regulatory element antagonistic modulator). The gene's function was highly interesting: it obviously served as a key regulator in the perception of pain. Mice who lacked the gene showed clear signs of markedly reduced sensitivity to all kinds of pain, whether chronic or acute. Otherwise, the mice appeared perfectly normal.
MADISON — In the rogues' gallery of microscopic infectious agents, the prion is the toughest hombre in town.
DALLAS – Jan. 15, 2009 – In a national clinical trial, adolescents with moderate to severe depression first given a placebo treatment and then an antidepressant medication alone or in combination with therapy responded just as well over the long term as participants who received active treatment throughout the study, UT Southwestern Medical Center researchers report.
Looking at the retina in the eyes of patients with cerebral malaria has provided scientists with a vital insight into why malaria infection in the brain is so deadly. In a study funded by the Wellcome Trust and Fight for Sight and published today in the Journal of Infectious Diseases, researchers in Malawi have shown for the first time in patients that the build-up of infected blood cells in the narrow blood vessels of the brain leads to a potentially lethal lack of oxygen to the brain.
Rats whose mothers were fed alcohol during pregnancy are more attracted to the smell of liquor during puberty. Researchers writing in BioMed Central's open access journal Behavioral and Brain Functions have shown that rats exposed during gestation find the smell of alcohol on another rat's breath during adolescence more attractive than animals with no prior fetal exposure.
Scientists at St. Jude Children's Research Hospital have teased apart the biological details distinguishing two related neurological diseases—ataxia telangiectasia-like disease (ATLD) and Nijmegen breakage syndrome (NBS).
PITTSBURGH, Jan. 14 – A standard pediatric vaccine used to prevent several common types of life-threatening infections also effectively reduced the rates of another disease, pneumococcal meningitis, in children and adults, according to a multi-center study led by the University of Pittsburgh School of Medicine. The study, published in the Jan. 15 issue of the New England Journal of Medicine and based on a detailed review of pneumococcal meningitis cases, also noted an increase in strains of pneumococcal meningitis not covered by the vaccine and those resistant to antibiotics.
Imagine being forced to say no to a child crying for more food at supper. Sadly, Margie Fischer doesn't have to imagine it; that was normal life at her family's dinner table for years. Her daughter Maggie, now 20, suffers from phenylketonuria (PKU), a genetic disease that means her body can't tolerate anything more than a low-protein diet.
PKU is described by scientists as an autosomal recessive genetic disease that is characterized by a deficiency in an enzyme called phenylalanine hydroxylase (PAH).
Anyone who has visited a science museum, gone on a nature walk, or watched a science program on public television knows that one need not be in a classroom or lecture hall to learn about science. Indeed, opportunities to be immersed in science present themselves to people of all ages, backgrounds and abilities, in a myriad of locations.
ALBUQUERQUE, N.M. — The worldwide attempt to increase the speed of supercomputers merely by increasing the number of processor cores on individual chips unexpectedly worsens performance for many complex applications, Sandia simulations have found.
New research reveals the brain activity that underlies our tendency to "follow the crowd." The study, published by Cell Press in the January 15th issue of the journal Neuron, provides intriguing insight into how human behavior can be guided by the perceived behavior of other individuals.
Many studies have demonstrated the profound effect of group opinion on individual judgments, and there is no doubt that we look to the behavior and judgment of others for information about what will be considered expected and acceptable behavior.
New research from University of California, Davis, shows why a species of tiny worm can learn to ignore an odor – information that could have implications for how human memories are formed.
Scientists have known for decades that sensory neurons – nerves in places like our fingers, ears and eyes – begin the complex task of processing sights, sounds and other stimuli before forwarding the job to the body's mainframe computer: the brain. But just how these neurons accomplish their task has not been well understood.
A tug-of-war between the two sides of the brain causes it to become asymmetrical, according to research published today in the journal Neuron. Asymmetry in the brain is thought to be important to enable the two hemispheres to specialise and operate more efficiently.
WASHINGTON -- Each year, tens of millions of Americans, young and old, choose to learn about science in informal ways -- by visiting museums and aquariums, attending after-school programs, pursuing personal hobbies, and watching TV documentaries, for example. There is abundant evidence that these programs and settings, and even everyday experiences such as a walk in the park, contribute to people's knowledge and interest in science, says a new report from the National Research Council.