Theta rhythms occurring in the hippocampus involve numerous neurons firing synchronously at a rate of three to eight times per second. These rhythms have been associated with longterm potentiation, a cellular mechanism underlying learning and memory. In rodent studies, the team found that both unsupervised learning and artificial application of theta rhythms triggered BDNF signaling at synapse creation sites. This relationship has implications for maintaining good brain health,nfl uk store, says Gall, a professor of anatomy amp neurobiology. There is evidence that theta rhythms weaken as we age, and our discoveries suggest that this can result in memory impairment.


Eightyearolds learn primarily from positive feedback Well done!, whereas negative feedback Got it wrong this time scarcely causes any alarm bells to ring.nbsp Twelveyearolds are better able to process negative feedback, and use it to learn from their mistakes.nbsp Adults do the same, but more efficiently.nbsp Brain areas for cognitive control The switch in learning strategy has been demonstrated in behavioural research, which shows that eightyearolds respond disproportionately inaccurately to negative feedback. But the switch can also be seen in the brain, as developmental psychologist Dr Eveline Crone and her colleagues from the Leiden Brain and Cognition Lab discovered using fMRI research.nbsp The difference can be observed particularly in the areas of the brain responsible for cognitive control. These areas are located in the cerebral cortex.


The researchers administered the IAT in two different settings: once in Morocco, with bilinguals in Arabic and French, and again in the U.S. with Latinos who speak both English and Spanish. In Morocco, participants who took the IAT in Arabic showed greater preference for other Moroccans. When they took the test in French, that difference disappeared. Similarly, in the U.S., participants who took the test in Spanish showed a greater preference for other Hispanics. But again, in English, that preference disappeared. It was quite shocking to see that a person could take the same test, within a brief period of time, and show such different results, Ogunnaike says. Its like asking your friend if he likes ice cream in English, and then turning around and asking him again in French and getting a different answer.


The rats learn, and we know that the learning is mediated by the small set of cells we studied. We know that adjacent cells in the cortex, which are not required to learn the new task, do not show the structural change. So presumably the structural change is occurring only in the learning neurons, and the learning would likely not occur without the structural change. He added that in order to determine whether the structural change is necessary for the learning to occur, scientists would need to block the expansion in spines and then observe a failure to learn. Yet the inference is quite strong that structural change is necessary for the learning to occur. Tuszynski said it remains to be seen how the brain changes in other types of learning, such as languagebased knowledge or arithmetictype learning.


Participants might press one key when they see a Moroccan name or a good word, and press another when they see a French name or a bad word. Then the key assignments are switched so that Moroccan and bad share the same key and French and good share the other. Linguist Benjamin Lee Whorf first posited in the 1930s that language is so powerful that it can determine thought. Mainstream psychology has taken the more skeptical view that while language may affect thought processes, it doesnt influence thought itself. This new study suggests that Whorfs idea, when not caricatured, may generate interesting hypotheses that researchers can continue to test. These results challenge our views of attitudes as stable, Banaji says. There still remain big questions about just how fixed or flexible they are, and language may provide a window through which we will learn about their nature.


We plan to followup this study when the children are older, to find out which skills give the best indication of later language abilities and problems. We have already examined how much parents talk to their children at home. Now we are also going to look at parents levels of education, and the childrens home environments, such as the number of books they have, to see what influences these have. Story Source: The above story is reprinted with editorial adaptations by ScienceDaily staff from materials provided by Economic amp Social Research Council. Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.eed to cite this story in your essay, paper, or report? Use one of the following formats: Note: If no author is given, the source is cited instead. ScienceDaily Oct.


The researchers gathered information on how often children took part in literacy activities, such as shared book reading the quality of mothers engagements with their children, such as childrens exposure to frequent and varied adult speech and the availability of learning materials, such as childrens books. From this information, the researchers calculated a total learning environment score at each age for each of the children. They also measured the number of words the children understood and their knowledge of letters and words at five years old. The quality of childrens environments over time varied greatly, said Rodriguez. Some children experienced environments that were uniformly low or high in language and literacy supports at all ages examined, while others experienced environments that changed as they developed.