Scientific News

Can words influence pupil dilation?

We know that our pupils dilate (mydriasis) and contract (mycosis) depending on ambient light and our mood. A recent study conducted by researchers at Aix-Marseille University’s laboratories of Cognitive Psychology, and Speech and Language, along with the University of Groningen (Netherlands) shows that the meaning of a word also influences the size of our pupils. How can a word trigger pupil dilation or contraction?

During the 70s, Eckward Hess, a pioneer in pupillometry (and former head of the psychology department at the University of Chicago) observed that, in general, pupil size increases when a person observes something or someone "stimulating." Ads for cosmetics have ...

Do ravens hold a grudge?

Many studies have already demonstrated the intellectual abilities of corvids, such as crows, magpies, and ravens. A scientific team from the University of Vienna (Austria) and the department of cognitive sciences at Lund University (Sweden) tested the memory capacities of crows. By subjecting them to a rather unusual experiment, the researchers discovered that ravens are rather spiteful creatures…

J.J.A. Müller and colleagues tested the memory of nine ravens in an exchange paradigm with humans (reciprocity). Laggie, Horst, Louise, Nobel, and the other ravens had the opportunity to exchange a low-quality food (bread) for a high-quality food (cheese); experiments have shown ...

Can spider venom protect your brain?

Its name: Hadronyche infensa or the “Darling Downs funnel web spider” (the name of a vast farming area in Australia): a very toxic poisonous spider. But this creature may also have an unexpected virtue: protecting the brain from neural damage caused by a stroke. How did Australian researchers chance upon this discovery? Read on to find out more about this study published in PNAS.

One of the studies main authors, Professor Glenn King from the Institute for Molecular Bioscience at the University of Queensland (Australia) says, “We believe that we have, for the first time, found a way to minimize the effects of brain damage after a stroke.” These encouraging remarks are ...

Is GPS bad for your brain?

For many people GPS is a beneficial form of technology. But letting yourself be guided vocally (or even just visually) by a GPS could actually be harmful to your brain in the long run. A study published in the review Nature Communication tells us why following the instructions given by a virtual guidance device could impair our brain’s orientation functions, e.g. our internal GPS.

It began in 2014 when a team of researchers (Edvard and May-Britt Moser, and John O’Keefe) shed light on the existence of a tracking and navigation system in the human brain. Their research showed that cells in the hippocampus helped animals to record spatial information in order to orient ...

How to become a memory athlete

You’re undoubtedly already familiar with memory champions that are capable of easily memorizing tens, hundreds, or thousands of pieces of information (word, numbers, faces, etc.) A recent study published in Neuron shows that, from a cerebral point of view, they’re not really so different from the rest of us. And that with training we can also considerably increase our memorization abilities and even compete with these athletes!

In order to better understand the brain features of people with highly developed memorization skills, the research team led by Martin Dresler (of the Radboud University Medical Center in the Netherlands) decided to study the 23 top participants in ...

Can an eye that's disconnected from the brain see?

In regenerative medicine, in cases of transplantation or graft, innervation, or the supply of nerves to a body part, remains a major difficulty. This is particularly true for the sensory organs since they must be connected to the brain in order to communicate auditory, visual, and tactile information. But a recent study, carried out on tadpoles seems to indicate that it's possible to use the eye without it being directly connected to the brain.

In a previous study, D.J. Blackiston, K. Vien and M. Levin succeeded in demonstrating that eyes grafted to the outside of the tadpole’s head were sensitive to light. However, visual tests were disappointing, since innervation failed ...

How does the brain of a believer function?

People who have had a religious experience often describe feelings of joy, warmth and peace. The same feelings are associated with falling in love. However, the brain mechanisms of a believer remain unknown. The current study aimed to improve understanding of the neurobiology underlying spiritual and religious experiences. How does the brain of a believer function?

Hypotheses about the neurobiology of a religious experience are conflicting. Discovering the neuroscience of religious experiences seems vital if we are to understand the motivation for religious behavior. The study undertaken by American researchers from the University of Utah and published in the review ...

Which social media platform is the most dangerous for our mental health?

YouTube, Twitter, Facebook, Snapchat, Instagram. The five most popular social media platforms ranked in order from the least to the most harmful for teenage mental health. This classification was made following the results of a British study by The Royal Society for Public Health and the Young Mental Health Movement, published in May 2017. The study was carried out on 1500 young people aged 14 to 24, of whom 91% use the internet for social networking. So, what were the findings?

In the introduction to the study, Shirley Cramer (President of the Royal Society for Public Health) and Becky Inkster (Department of Neuroscience Cambridge University) remind us of the significance ...

Do creative people's brains look different?

The implications of the “two-brain” theory (right hemisphere/left hemisphere) have already been explored; particularly their use in branding people’s strengths and flaws. Various research has highlighted the importance of connections between the two hemispheres and has demonstrated that our personality can't be explained by our use of one or the other. A new study supports this point of view by showing that creative people have better brain connections.

The research conducted by two statisticians is supported by a study on neuroanatomy and creativity previously carried out by R. Jung and colleagues at the University of New Mexico. Using a special MRI technique, the team ...

Using subliminal images to overcome phobias?

What if arachnophobia could be overcome without the sufferer even realizing it? According to a study conducted by American researchers, ending one of our population’s most common phobias, a fear of spiders, could be achieved simply by exposing arachnophobes to subliminal images. Rather than putting them face-to-face with a tarantula, a subconscious exposure to photos might prove to be quite effective. How did the scientists make this surprising discovery?

Directed by Bradley S. Petersen (director of the Institute for the Developing Mind at Children's Hospital Los Angeles) and Paul Siegel (associate professor of psychology at NYU’s Purchase College), the team of researchers ...

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