Tag: "visual" at biology news
Is there a pilot in the insect?
... from front to back across the central part of the visual
field, creating an "optic flow", which is defined as the angular speed at which the ground contrasts move past. By definition, this angular speed is equal to the ratio of the horizontal speed and the altitude. What these authors call an "optic flow...
Ready when you are
...ty competitors. Both sexes are unconsciously using visual
cues to increase their likely mating opportunities...justs its rate of sexual maturation in response to visual
cues. While our study focused on green swordtail fish, it seems unlikely that this attribute is limi...
Folate and B12 may influence cognition in seniors
...tudes such as response speed, sustained attention, visual
spatial skills, associative learning, and memory. Cognitive impairment was identified when a subject fell into the bottom 20th percentile of the distribution on the test. "People with normal vitamin B12 status performed better if their serum folat...
Microsurgery and Super Glue show how antennae aid moth navigation
...information too, and when the light is low and the visual
cues are hard to see they have to depend more on the mechanosensory system." Hawk moths are among crepuscular insects, which are most active during low-light times of the day, at twilight or just before dawn. Like other insects, their antennae all...
UTSA researchers examine effects of global warming on Antarctic
...said Xie. During the journey, Xie and Cicek made visual
observations of the sea ice for their own research and also transmitted meteorological data regularly into the world weather observing network for a variety of factors including water and air temperatures, wind speed and direction, visibility, cloud...
Female Antarctic seals give cold shoulder to local males
...ies have shown links between genetic variation and visual
traits. The scientists believe that female fur seals may be able to assess male genetic traits visually by examining body size and condition, dominant behaviours, or territory quality. Another possibility is that females can use smell to determine ...
Huddling and a drop in metabolism allow penguins to survive the South Pole cold
...ionally, using external devices during pairing and visual
observations of implanted males during incubation, they sought to study deep body temperature variations when the birds were huddling. Study Published in American Journal of Physiology-Regulatory/Comparative The authors of the study entitled "B...
The time it takes to reassemble the world
... enough to perceive a seamless and richly detailed visual
world. But instead of "photographic snapshots, inf...through individual nerve cells, or neurons, to the visual
center in the brain. How the brain puts the scene back to together has been hotly debated ever since...
Academy honors 18 for major contributions to science
...ering cholesterol, and insights into how the human visual
system learns to recognize objects. The awards an...sen "for elucidating how humans learn to recognize visual
objects, and for developing computational models of the mechanisms that mediate this learning." The...
News tips from the Journal of Neuroscience
...eality system in which they presented monkeys with visual
or vestibular cues separately while recording from...estibular, or combined stimulation. Neurons in the visual
condition largely used an eye-centered reference frame, and vestibular tuning was largely head cente...
Microtubule protein interactions visualized en masse
...namics via application of their new method, called visual
immunoprecipitation (VIP), which enables simultaneous visualization of multiple protein interactions in cell extracts. When eukaryotic cells undergo cell division, a dramatic reorganization occurs during the transition from interphase to metaphase...
Lost dogs found more often than lost cats, study suggests
...r of veterinary preventive medicine. "Some form of visual
identification is also critical to the recovery of a pet, and can result in a faster recovery." Although Ohio law requires that dogs be licensed, just 41 percent of the lost dogs in the study wore a license at the time of their disappearance. Less t...
Trusting your instincts leads you to the right answer
... to each individual's search for their target. The visual
display screen was switched off at various time intervals either before or after the subjects' eyes landed on the target. When the on-screen image was hidden immediately after the subjects' eyes had landed on the target, the subjects often believed t...
New study challenges 'critical period' in childhood vision development
...hopes of shedding some light on the acquisition of visual
skills. The goal of his "Project Prakash" is to fi... This case demonstrated that a person can acquire visual
function even after being deprived of sight for an extended period during childhood. The evidence g...
Reduced frontal-lobe activity and impulsivity may be linked to alcoholism risk
...a. All participants were assessed with a standard visual
oddball task, where the subject presses a button o...reduced frontal-lobe activity while processing the visual
target signals. "This is the first study to demonstrate that reduced brain activity in the fronta...
Imaging pinpoints brain regions that 'see the future'
...ral network, patterns of activity suggest that the visual
and spatial context for our imagined future often ... including memories of specific body movements and visual
perspective changes data stored as we navigated through similar settings in the past. These findin...
News tips from the Journal of Neuroscience
...tion tuning, somewhat akin to that observed in the visual
cortex. This week Pramodsingh et al. honed in on a single finger pad of two rhesus monkeys and show that this orientation tuning involves multiple mechanisms. They indented the skin of a finger pad with a motorized bar at eight different orientations...
Squirrels place winning bet in unpredictable world
...quirrels every summer. "Squirrels could be using a visual
cue or a hormonal cue they gain from eating the buds," said Boutin. "These squirrels are very clever because they use reliable cues to invest in extra offspring not when they can but when it makes sense evolutionarily."...
Buildup of damaged DNA in cells drives aging
...cluding weight loss, muscle wasting, hearing loss, visual
impairment, anemia, hypertension and kidney failure. The boys family had immigrated to Germany to seek better medical treatment for his condition. Extreme sensitivity to ultraviolet (UV) radiation from sunlight is a hallmark of diseases caused by d...
Watching with intent to repeat ignites key learning area of brain
...e intention of the observer rather than simply the visual
stimulus that is being viewed," Frey said. "If the goal is to be able to do what you are seeing, then it appears that activity through your motor system is up-regulated substantially." Using fMRI, researchers are able to monitor changes in activity...
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