Navigation Links
Pupil in Biological News

Bright lights, not-so-big pupils

... cells bear on behavior, the researchers examined pupil constriction in mice that had been genetically ... in the dark, the team measured the degree of pupil constriction. They found that, on average, ... melanopsin molecules are enough to trigger a pupil response. "But it takes a lot of light to ...

Researchers advance knowledge of little 'nano-machines' in our body

... which allows the transmission of electrical signals along our nerve cells. The size of these small valves is about a million times smaller than the pupil of a human eye. The new technique will allow scientist to measure one single ion channel at the time and investigate how different parts inside the ...

Atomic-resolution views suggest function of enzyme that regulates light-detecting signals in eye

... a striking image of the iris of Heikaus' eye, photographed by UW ophthalmology imaging supervisor Brad Clifton. Superimposed in the center of the pupil was a three-dimensional structure of the GAF domain. In humans, GAF-containing proteins are rare. In plants and bacteria, GAF domains are ...

News tips from the Journal of Neuroscience

... pictures. In order to decrease the associated emotion, subjects were instructed to imagine, for example, a happy out come for a negative image. pupil dilation provided a measure of arousal. During the reappraisal, nondepressed subjects showed increased activity in the left prefrontal cortex (PFC), ...

Female butterflies go for sparkle -- not size -- when choosing to mate

... quantity of eyespots on the wing, eyespot and pupil color, and pupil reflectivity. "Once we found a trait that ... But when the researchers painted the white pupil on the dorsal side with black paint, thereby ...

Computer imaging assists with facial reconstructive surgery

... the distance from the porion (the top of the external ear canal) to the pupil and to the pogonion (the most prominent point on the chin) was measured. ... the porion to pogonion distance and the ratio of the distance between the pupil and the pogonion and the distance between the porion and the pogonion ...

First demonstration of 'teaching' in non-human animals

... In other words, the teacher provides information or guidance for the pupil at a rate suited to the pupil's abilities, and the pupil signals to the teacher when parts of the 'lesson' have been assimilated ...

Transplanted photoreceptor precursor cells restore visual function in mice with retinal degeneration

... or degenerating rods. The transplanted cells survived and were functional for the duration of the study. Scientists observed improvements including pupil response to light and response to light stimuli from ganglion cells, which form the circuitry to the brain. Swaroop explains that ...

Train your brain to hear your friends at a party

... "When we switch on a bright light our eyes detect the increase in light levels and the brain sends a message to the eye to tell it to contract the pupil and let in less light. This is a feedback system where the brain is getting information from the eye about its surroundings, processing that ...

Does missing gene point to nocturnal existence for early mammals?

... This melanopsin photoreceptor is not linked to sight but uses light for non-visual processes, such as regulating our day-night rhythms and pupil constriction." Although the melanopsin gene is present in all vertebrates, the version in mammals was unusually different to that found in fish, ...

Blink, and the brain misses it

... in visual awareness during blinks may be a neural mechanism for preventing the brain from becoming aware of the eyelid sweeping down over the pupil during a blink and the world going dark," explains Professor Frith. In summing up the study's implications, the authors suggest that when we blink, ...
Other Contents
(Date:4/15/2014)... Biologists at UC San Diego have succeeded in ... hormone responsible for growth and resistance to drought. ... studies to determine how the hormone helps plants ... by the continuing increase in the atmosphere,s carbon ... achievement appears in the April 15 issue of ...
(Date:4/15/2014)... Looking at the question of how social behavior has ... universities in Mainz and Basel have gained new insights ... simply compete for food. Rather the siblings share what ... absent," explained Dr. Jol Meunier of the Evolutionary Biology ... University of Mainz (JGU). The team of biologists from ...
(Date:4/15/2014)... (April 15, 2014) The American Association of Anatomists ... All awards will be presented during the Closing ... Hotel on Tuesday, April 29th at 7:30 p.m. during ... , The 2014 award winners are: , ... PhD, of the Icahn School of Medicine at Mount ...
Breaking Biology News(10 mins):Biologists develop nanosensors to visualize movements and distribution of plant hormone 2Sibling cooperation in earwig families gives clues to early evolution of social behavior 2American Association of Anatomists 2014 award winners 2
(Date:4/14/2014)... treat children with uncomplicated acute appendicitis is a reasonable ... fewer missed school days, according to a pilot study. ... Hospital and published online April 12 in the ... the first prospective study on nonoperative management of acute ... , Researchers enrolled 77 patients age 7 to 17 ...
(Date:4/14/2014)... 2014, Perth, Australia. Drug discovery company Proteomics International ... of a companion diagnostic (CDx) test with the ... The research team authenticated the panel of biomarkers ... samples. Seven biomarkers were validated at high stringency ... The mass spectrometry data was then cross-validated using ...
(Date:4/14/2014)... 2014) When it comes to the cost and ... Patients get the best care when they are treated ... extensive experience in their current job, according to a ... and Columbia Business School. The study was published in ... Applied Economics . , The review of more ...
(Date:4/13/2014)... STANFORD, Calif. A low-cost empowerment program for ... and sexual harassment of these girls, who live ... and are frequently attacked, a large new study ... Stanford University School of Medicine, Lucile Packard Children,s ... No Worldwide, validated the program,s effectiveness in combating ...
(Date:4/11/2014)... the processes that control brain cell production could pave ... brain-related disorders. , Scientists have gained new understanding of ... how and when nerve and brain cells are formed ... and keeps it healthy. Their findings could help explain ... which is a fundamental characteristic of many diseases including ...
Breaking Medicine News(10 mins):Health News:Antibiotics alone are a successful treatment for uncomplicated acute appendicitis in kids 2Health News:Antibiotics alone are a successful treatment for uncomplicated acute appendicitis in kids 3Health News:Longer nurse tenure on hospital units leads to higher quality care 2Health News:Empowerment program greatly decreases incidence of rape, Stanford/Packard-led study finds 2Health News:Empowerment program greatly decreases incidence of rape, Stanford/Packard-led study finds 3Health News:Empowerment program greatly decreases incidence of rape, Stanford/Packard-led study finds 4
Other TagsOther Tags