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Tag: "eye" at biology news

Study ties 'new' cell-death mechanism to developmental and degenerative brain disorders

...uch as walking and speaking. They also may lead to eye movement abnormalities, cognitive decline, epilepsy and other significant deficits. Twenty-seven specific locations on human chromosomes have been identified for involvement in the development of ataxias, and 10 causative genes or mutations have bee...

Picking particles faster than one at a time

.... Adiga separately inspected the 55 micrographs by eye and "manually" selected particles, well over 80 percent of which turned out to be the same as those picked by the program. Fewer than 10 percent of the images chosen by the program were false positives. A coauthor of the paper, William Baxter, inde...

Fossil find: 'Godzilla' crocodile had head of a dinosaur, fins like a fish

... of the larger species. The shape of the nostrils, eye sockets, and other areas of the skull combined with a telltale groove in its jaw to prove its lineage. “This is the most remarkable change in the size and shape of the teeth and snout in the history of marine crocs,?Pol said. The three fossil speci...

Finding the mind's eye

... understanding of the brain's interaction with the eye by identifying the neural basis of conscious experience, a relationship important to the fields of medicine, neurology and psychology. Tse and his co-authors, Susana Martinez-Conde, Alexander A. Schlegel and Stephen L. Macknik of the Barrow Neurolog...

Scientists observe how a close bond activates the immune system

...re physically held in the outer ring of the bull's eye rather than the center. "We locked the receptors...rchers had speculated that the concentrated bull's eye structure somehow allowed T cells to maintain their state of activation. But the new work shows that...

Male elephants woo females with precise chemistry

...lephants from a temporal gland located between the eye and ear, comes in two forms, each representing one half of the enantiomer pair and identified as either "plus" or "minus." The OHSU and New Zealand team showed that the enantiomers of frontalin are released in the elephants in specific ratios that d...

Retinal scans eyed for New Mexico show cattle

...to each animal's eye. The scanner senses when the eye is open, automatically makes an image, and downloads the data to a computer database. In addition to the retinal image, the device records the date, time and a global positioning satellite coordinate of the location. "It's as simple as taking a pict...

Scientists characterize proteome of human cornea

... and proteins. Its functions include shielding the eye from germs, dust, UV light, and other harmful matter and acting as the eye's outermost lens. Approximately 120 million people in the United States wear eyeglasses or contact lenses to correct nearsightedness, farsightedness, or astigmatism. These vi...

Protein behind autumn color splendor identified

...all (nearly a million times smaller than the human eye can perceive), but it is possible see them if there are many of them together. LHCII is probably the most commonly prevalent membrane protein on earth. There is so much of it, in fact, that it is visible from space--in satellite images of the earth ...

Gene therapy works in mice to prevent blindness that strikes boys

...vent blindness in mice with a form of an incurable eye disease that strikes boys. Writing in the August ...ransfer method eventually could be applied to many eye diseases caused by single gene defects, including a host of retinal disorders. Retinoschisis is usu...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...es come over.?/p> Interested females initially eye the males, who select their burrows based upon their body size, and if they’re interested, partially or fully enter a burrow to size it up. “The burrow openings, which are circular, are just big enough for the owners to get in,?deRivera said. “Crabs...

On a wing and a prayer - Alaska researchers seek clues to bird flu

... the world are beginning to cast an equally uneasy eye toward migratory birds, especially in Alaska, following recent outbreaks of avian influenza in Southeast Asia and, last week, in Siberia. Alaska is at the intersection of the Asian and North American flyways for migratory birds and scientists say th...

Color perception is not in the eye of the beholder: It's in the brain

... count the color-receptive cones in a living human eye for the first time, and we were astonished at the ...Williams that maps out the topography of the inner eye in exquisite detail. The technology, known as adaptive optics, was originally used by astronomers in...

Out of sight, out of mind? Not necessarily

...y when the area of the brain that records what the eye sees is temporarily shut down, according to resear...a at the back of the brain that processes what the eye sees - to interrupt the normal visual pathway. The volunteers looked at a computer screen, and duri...

Molecular trigger for Huntington's disease found

...t deleting p53 suppresses damage to neurons in the eye of fruit flies engineered to have the abnormal HD protein. And in mice with the abnormal protein, knocking out p53 corrects behavioral abnormalities that the mice otherwise display. These behaviors include abnormal reflexes such as an inhibited start...

Retina adapts to seek the unexpected, ignore the commonplace

... "Apparently our thirst for novelty begins in the eye itself," says Markus Meister, the Jeff C. Tarr Pro...anglion cells, which convey visual images from the eye to the brain. These cells generally record local spatial differences and changes over time rather th...

Insight into our sight: A new view on the evolution of the eye lens

...cally remarkable structures such as the vertebrate eye has long been a focus of intrigue and theorizing b...nt Biology, the evolutionary history of a critical eye protein has revealed a previously unrecognized relationship between certain components of vertebrate...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...ressure. Notably large waves are seen around the eye of Hurricane Rita in the radar image. ASAR measure...casters to obtain reliable characterization of the eye wall dimension and the radii of gale- tropical storm- and hurricane-force winds in order to provide ...

'Shifty-eyed' Monkeys Offer Window Into Brain's Social Reflexes

...In their experiments, the researchers compared the eye movements of humans and rhesus macaque monkeys whe...hnique to measure with high accuracy and speed the eye movements of the subjects. Explained Platt, 'Our prediction was that if seeing a monkey looking in o...

Scientists focus on 'dwarf eye'

...lteration in a gene called MFRP that helps control eye growth and regulates the organ's shape and focus. ... a tiny portion of the human eye, and it can alter eye refraction, or focus," said Olof Sundin, Ph.D., assistant professor of ophthalmology at the Johns Ho...

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