Our brain combines smell with the information about space and time to form episodic vivid memories, according to a recent research, published in the journal Nature Communications. These findings can help improve sniff tests for the Alzheimer’s disease.
In the course of the study, a team of researchers examined the role of the anterior olfactory nucleus (AON) in memory using a mouse model in a range of experiments. They discovered a previously unknown neural pathway between the hippocampus and the AON.
Study co-author Afif Aqrabawi says: “[The findings demonstrate] that we now understand which circuits in the brain govern the episodic memory for the smell. The circuit can now be used as a model to study fundamental aspects of human episodic memory and the other odor memory deficits seen in neurogenerative conditions.”
According to the findings of a new study from Queen’s University Belfast, narcissistic teens may show better results at school.
For the study, a lead researcher Kostas Papageorgiou and his colleagues recruited 340 teenage students from different high schools in Milan, Italy. Having assessed the received data, the scientists concluded that teens with higher levels of subclinical narcissism tend to be more mentally tough what leads to better performance at school.
Lead researchers Kostas Papageorgiou, a lecturer in developmental psychopathology at Queen’s University Belfast in the United Kingdom, says: “People who score high on subclinical narcissism may be at an advantage because their heightened sense of self-worth may mean they are motivated, assertive, and successful in certain contexts.”
A new study from the United Kingdom suggests that a simple quiet rest, just for 10 minutes, may help to memorize new information in fine detail.
To study this effect, the researchers designed a memory test to assess the ability to keep finely graded information. For the experiment, the researchers took the information on memorizing from 60 young male and female participants whose average age was 21 years.
Michael Craig, a researcher from the Heriot-Watt University in Edinburgh, United Kingdom, says: “This new finding provides the first evidence that a brief period of quiet rest can help us to retain more detailed memories.”
A team of scientists from the University of Cambridge has identified a chemical within the region of the brain responsible for memory that allows us to suppress undesired thoughts. This helps explain why people with anxiety, post-traumatic stress disorder (PTSD), depression, and schizophrenia often have persistent intrusive thoughts when these circuits go wrong.
In their study, the researchers used a task known as the ‘Think/No-Think’ procedure to identify a significant new brain process enabling the prefrontal cortex to successfully inhibit our thoughts.
Using functional magnetic resonance imaging (fMRI) and magnetic resonance spectroscopy, the scientists managed to observe what was happening within the key regions of the brain as the participants tried to inhibit their thoughts. The researchers were able to measure brain chemistry with the help of spectroscopy.
Two new independent studies conducted in mice suggest that ketogenic diet, also known as “keto diet”, may improve the memory of old subjects and prolong lifespan.
One study was led by Drs. Eric Verdin and John Newman from the Buck Institute for Research on Aging in Novato, USA. Another study was led by Dr. John Ramsey from the University of California, Davis School of Veterinary Medicine.
Both studies checked the effects of four diet types such as ketogenic, low carbohydrate, high fat, and control diet in mice. A team of scientists from the Buck Institute found that a keto diet prevent obesity, reduced mid-life mortality, and prevented memory loss in mice.
Dr. John Ramsey says: “We expected some differences [in mice fed the keto diet], but I was impressed by the magnitude we observed – a 13% increase in median life span for the mice on a high-fat versus high-carb diet. In humans, that would be 7 to 10 years. But equally important, those mice retained quality of health in later life.”