Wednesday, January 31, 2018

Kristen Stewart and Jesse Eisenberg's Awkward Interview


Symmetrical eyes indicates dyslexia - NEUROSCIENCE

Scientists have found that dyslexics have an unusual pattern of cells in their eyes which makes letters appear back to front.

The proposed cause of dyslexia has mainly focused on the brain.
But scientists have discovered that in those with the condition the central area of the retina may have developed in a way that makes letters difficult to read.

In a study, the researchers found dyslexics had light detecting cells – called cones – arranged in a circular way in both of their retinas.

In people with ‘normal’ reading ability, this circular arrangement is only found in the dominant eye. The less dominant eye had an oval arrangement – which leads to a slightly less good image.

During vision, the brain has to ‘knit together’ the two images – each of which goes to a separate side of the brain. For non-dyslexics, the brain grants priority to the dominant eye for the scene – with the other eye playing a less important role.

In the complex task of visually making sense of the world, the brain generates mirror images of what we see, as well as those the right way round.

But in a dyslexic, both eyes were found to have a symmetrical, circular pattern. This means each eye battles for dominance – causing confusion in the brain and leading to some letters such as ‘b’ and ‘d’ becoming confused.

Journal article:

Source: Corina Marinescu

The First Explorer - UNIVERSE

Sixty years ago, on January 31, 1958, the First Explorer was successfully launched by the Army Ballistic Missile Agency on a Jupiter-C rocket.  Inaugurating the era of space exploration for the United States, Explorer I was a thirty pound satellite that carried instruments to measure temperatures, and micrometeorite impacts, along with an experiment designed by James A. Van Allen to measure the density of electrons and ions in space.

The measurements made by Van Allen's experiment led to an unexpected and then startling discovery of two earth-encircling belts of high energy electrons and ions trapped in the magnetosphere. Now known as the Van Allen Radiation belts, the regions are located in the inner magnetosphere, beyond low Earth orbit. Explorer I ceased transmitting on February 28, 1958, but remained in orbit until March of 1970.

Image & info via APOD
Image Credit:  NASA

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Tuesday, January 30, 2018

Brain Responds Differently to Food Rewards in Bulimia Nervosa - NEUROSCIENCE

Findings could contribute to new treatment therapies targeting specific brain pathways

Researchers at University of California San Diego School of Medicine have discovered differences in how the brain responds to food rewards in individuals with a history of bulimia nervosa (BN), an eating disorder characterized by frequent episodes of binge eating followed by efforts of purging to avoid weight gain. The findings further define specific brain mechanisms involved in eating disorders and could help lead to new treatment therapies.

Metabolic (hunger) and hedonic (reward) brain mechanisms both contribute to the regulation of eating. The findings, published July 10 in the Journal of Abnormal Psychology, address the question of whether binge eating in BN results from disruption of one or both mechanisms, or is the product of their interaction.

“Our study suggests that adults with bulimia nervosa may have elevated reward-related brain activation in response to taste. This altered neural response may explain why these individuals tend to remain driven to eat even when not hungry,” said Alice V. Ely, PhD, principal author of the study in the Department of Psychiatry at UC San Diego School of Medicine.

Source & further reading:
Source: Corina Marinescu

Physicists create Star Wars-style 3D projections — just don’t call them holograms — SCI- TECH

They may not technically be holograms, but they're pretty impressive: Researchers have created moving 3D images that are viewable from any angle. The technique, called volumetric display, comes from the lab of Daniel Smalley at Brigham Young University. Smalley's team uses two sets of lasers—one traps and moves a particle around, while the other projects color onto the particle. The particle moves so quickly that our eyes perceive the projection as a solid-line image.

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