A team of researchers from the Brain Research Institute of the University of Zurich and the Swiss Federal Institute of Technology (ETH) have developed a fully automated brain registration method that could be used to segment brain regions of interest in mice. Neuroscientists are always seeking out new methods of exploring the structure and function of different brain regions, which are initially applied on animals but could eventually lead to important discoveries about the organization of the human brain. "My lab aims to reveal how the mammalian brain develops its abilities to process and react to sensory stimuli," Theofanis Karayannis, one of the researchers who carried out the study told Tech Xplore. "Most of the work we do is on the experimental side, utilizing the mouse as a model system and techniques that range from molecular-genetic to functional and anatomical." This study is part of a larger project, which also includes "Exploring Brain-wide Development of Inhibition through Deep Learning," a study in which Karayannis and his colleagues use deep learning algorithms to comprehensively track the so-called inhibitory neurons over time in order to gauge the development of capabilities of the brain at specific points in time.
It turns out that in larger human brains, regions involved in bringing together information are hyperexpanded – but we don't know what affect this might have on intelligence yet. Armin Raznahan at the US National Institute of Mental Health in Maryland and his colleagues discovered this by comparing brain images from around 3,000 people. They compared the area of 80,000 points across the cortex – the large part of our brains that is involved in higher functions like thinking. Analysing these, they found that some particular areas expanded more than others in people who had an overall larger brain size. These regions seem to be involved in integrating information from across the brain, he says.
A groundbreaking study to investigate how dog brains process speech has revealed canines care about both what we say and how we say it. It discovered that dogs, like people, use the left hemisphere to process words, and the right hemisphere brain region to process intonation. It found praise activates dog's reward centre only when both words and intonation match, according to the new study in Science. Trained dogs around the fMRI scanner used in the study: Dogs, like people, use the left hemisphere to process words, and the right hemisphere brain region to process intonation, according to the new study in Science. The brain activation images showed that dogs prefer to use their left hemisphere to process meaningful but not meaningless words.
It's difficult to identify whether or not someone is feeling suicidal by asking. According to studies, roughly 80 percent of those who go through with the act denied feeling suicidal the last time they spoke to a mental health care expert. However, AI-related technology -- which is also being applied to things like spotting cancerous cells -- might offer a way to identify these thoughts and prompt a timely intervention.
Researchers already know that the human brain isn't static, but it's now clear just how dynamic the mind can be. A Stanford University team has discovered that the networking between brain regions will fluctuate depending on the complexity of tasks. If you're at rest, your brain's components are relatively isolated. Handle a complicated activity, however, and the level of networking ramps up. The more interconnected your brain is, the better your performance -- in a memory test, those with the most integrated brains were the quickest and most accurate.