Scientists show that having a bigger brain does not necessarily mean having a better memory


After scanning the brains of more than 330 adults, the researchers concluded that having a larger brain does not necessarily mean having better memory, and they found that those with a larger hippocampus, the part of the brain that functions as a memory center, were not better on learning and memory tests. Previous research has shown that the hippocampus shrinks with age and may be associated with memory loss for retired people with Alzheimer’s disease, but the recent study, more specifically, found that the amount of a particular type of white matter, called the limbic white matter, determines the extent of Someone’s memory quality.

The results found that those who have a larger hippocampus and a less safe white substance have worse memories than those who have the opposite. A 2004 study showed that the size of the hippocampus is not always associated with memory performance in the elderly, but this study is the first to shed light on the cause, As the researchers say. Dr. Andrew Bander of Michigan State University, who prepared the new study, said the results showed the need to consider the relationship between the hippocampus and the rest of the brain when looking at low memory in older adults, and he and his colleagues, who included researchers from Hungary and Germany, studied different types One of the MRI scans on the participants ’brains.

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White matter is known as a component in the middle of the brain that is filled with nerves that carry messages throughout the organ in the form of electrical signals. The white material differs from gray matter that consists of other types of cells such as blood vessels, and those that transport nutrients to brain tissue. The study is a mental ability test, which involves listening to 15 words and writing as many of them as possible after that. The test was conducted five times so that the researchers could know the quality of learning among the participants during the repetition, then Dr. Bandar and his colleagues tried to find a link between how quickly people learn words, the size of the hippocampus and the white matter, and they found that only those who had a larger hippocampus and also a larger volume of white matter Connecting it to the rest of the brain learns faster than others.

The research team wants to use more data from the participants themselves to see if there is any change in brain structures associated with learning or low memory, with age, and these results can help doctors make early, more accurate diagnoses of age-related conditions such as Alzheimer’s .

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