Tag: "eye" at biology news
To train the eye, keep it simple
... line with other studies that have shown the human eye
to be highly trainable. The difference came in the...ystem. In clear display training, by contrast, the eye
can focus entirely on reducing the intrinsic noise of human visual processes (the researchers refer ...
Solving sleep problems helps epileptic children
...in duration, the children spent less time in rapid eye
movement, or REM, sleep, a period in the sleep cycle when brain activity is highest and people dream intensely. The children in the study spent 17 percent of total sleep time in the REM stage. The norm for young adults is 25 percent. "Removing the sl...
Ophthalmologists and physicists team up to design 'bionic eye'
Stanford physicists and eye
doctors have teamed up to design a "bionic eye," o...sparent goggles reflect an infrared image into the eye
and onto the retinal chip. Just as a person with normal vision cannot see the infrared signal coming...
Growth disorder gene plays a big role in normal size variation
...ms - as you find in a classic Mendelian trait like eye
color - suggests that the phenotype is controlled by a very small number of genes. In contrast, a complex trait such as body size is influenced by multiple genes as well as environmental factors, giving rise to a continuous spectrum of phenotypes. Th...
Alfred G. Knudson Jr., receives American Association for Cancer Research Lifetime Acheivement Award
..., particularly retinoblastoma, a type of pediatric eye
cancer. While a child may have inherited a predisposition to the disease through a genetic mutation from a parent, Knudsen hypothesized that this hereditary form would constitute only the first "hit" leading to the cancer. The disease would develop o...
Microarrays as phenotype
...genotype. For example, a person may have genes for eye
color. That is that individual's genotype. Blue eyes is the phenotype. The microarray data Shaulsky and his collaborators used show that they can determine the order in which genes act in a cascade that results in a particular phenotype. Shaulsky an...
Whooping cranes stabilize vision to find food
...visual fields only transiently, through the use of eye
movements alone, and accept quite a lot of so-called "visual flow" when in motion. In new work addressing this question, Thomas Cronin and Matthew Kinloch at the University of Maryland, Baltimore County, with the collaboration of Glenn Olsen of the P...
Royal Society study on adaptability of fish to warming oceans
...elephant. Much is known about the relation between eye
size and visual acuity, and between ear size and the frequency range of hearing. It is now possible to investigate the relation between the size of the organ of smell and olfactory performance. Contact: Dr H Pihlstrom, Dept of Biosciences, University...
Ophthalmologists implant five patients with artificial silicon retina microchip
...vertant scientific bias. "We operated on the right eye
of each of the initial 10 patients. For the next 20 patients we will randomly select which eye
will receive the ASR chip. In addition, post-operative vision testers will be masked as to which eye...
ASU researcher creates novel 'bioelectronic signatures' to detect DNA mutations
...will necessarily cause a mutation or determine our eye
or hair color but, on average, SNPs occur about once in every 1,000 DNA bases, adding up to 3 million potential individual differences across the human genome. Wang's method allows for an accurate, ultra-sensitive, rapid and low-cost identification ...
Variation in immune response gene causes age-related macular degeneration when triggered
...nvolve delivering healthy Factor H directly to the eye
to short-circuit the disease process; extracting stem cells from the eye
so they could be reengineered and re-implanted; or partial transplantation of the liver - the body's...
Six previously blind patients detect light, motion, identify objects with retinal prostheses
...tle or no sight perception due to the degenerative eye
disease retinitis pigmentosa (RP). Ultimately, however, the device is likely to be used for the millions of people suffering from age-related macular degeneration, or AMD, as well. In fact, notes Humayun, there are 25 million people across the globe,...
New tool reveals secrets of migrating cells
... of cell movement is just the beginning. The human eye
and brain can't pick out patterns of movement easily, so statistical techniques are needed to identify cells with different patterns of movement. As an immunologist, Robey focuses on the lives of T cells produced in the thymus and distributed via the...
Slow balls take the swing out of young ball players
...and her team began detecting a correlation between eye
problems and perception. For instance, children born with cataracts and treated as early as a few months of age were found to encounter problems with seeing motion later in life. Deficits in motion perception are particularly pronounced when a person...
How monarch butterflies are wired for navigation
...ht-detecting navigation sensors in the butterfly's eye
and the creature's circadian clock--a critical link if the butterflies are to compensate for the time of day in using their "sun compass." The researchers' techniques include molecular analysis of butterfly brain proteins, as well as flight tests in ...
Researcher gets NSF grant to create mutant maize lines
...esses in ways that are easily visible to the naked eye
or through biochemical or physiological analysis. Such experimentation will give researchers a better understanding of the relationships between specific genes and complex plant systems. The database will be invaluable to academic researchers intere...
Eye candy: Transcriptional control of vertebrate eye development
...lular effectors of Shh signaling in the developing eye
field and are required for proper optic nerve form...sion of Pax6 expression, the ventralization of the eye
field, and subsequent development of the optic nerve. Dr. Lemke notes that "in many respects, the ey...
Unrestrained retina too much of a good thing
...Calif. When primitive nerve cells begin forming an eye
in the mouse embryo, they are programmed to build ...cue at the right time, they mistakenly form a huge eye
that consists entirely of retina and lacks the optic nerve. The discovery that the retina is the 'de...
The lopsided brain: Attention bias is shared by humans and birds
...n it comes to the world laid before us, our mind's eye
has a bias. For reasons that are not entirely clear, during some tasks humans have a tendency to devote more visual attention to the left side of the visual world than the right side, a phenomenon known as pseudoneglect. Researchers now report that p...
Retina adapts to light changes by rewiring itself
...ight-sensitive sheet of neurons in the back of the eye
that encodes three basic features of the objects in our environment color, shape and motion and sends the coded information to the brain. The early processing steps for vision, therefore, occur in the retina. Deep inside this sheet of interconnecte...
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