Stress can help Studying for exams

Scientists have discovered that hormones are produced when we are stressed because changes in the cells of our brain that help to keep the memories better.

They found that stress hormones such as cortisol and adrenaline cause changes in how genes function in the neurons and increases their ability to learn.
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Professor Hans Reul, a neuroscientist at the University of Bristol has been heading the investigation, said the study suggests that while stress may increase the ability to help students learn.

He said that stress hormones, "program" a mechanism of DNA in the brain, appear to promote known as epigenetic modification, so that increases or decreases the expression of certain genes.

He said: "We often find unpleasant memories for the rest of us spend our lives more pleasant memories.

"This is because of the role stress plays - is clearly from a biological point of view on something that hurts or threatens us remember important.

to improve "It appears that stress hormones bind to specific receptors in the brain that control of epigenetic mechanisms involved in learning and memory.

"Take these epigenetic control mechanisms and this leads to increased expression of genes that play a role in the tilt and memory.

"So, essentially stress hormones are improving the process that usually occur when you are learning."

the part of the brain involved in memory and learning - The improvement of learning through the consolidation of memories in the hippocampus increased.

It will grow believed to cause the reprogramming of the genes in brain nerve cells in response to stress and develop more communication networks.

Dr. Reul presented his findings at the annual meeting of the British Association of Neuroscience and the journal Experimental Neurology.

given in times of stress, cortisol and adrenaline into the bloodstream to produce a variety of reactions including increasing the amount of sugar in the blood, helps the metabolism and immune system suppression.

In human evolutionary history would helped them to help in dangerous situations and the effect of these hormones in the brain, which contributed to the strong memories allowed our ancestors to avoid future similar situations have escaped shape.

But Dr. Reul said that while stress may be some good can for memory formation, excessive stress have the opposite effect.

"When we are stressed it is not possible to collect all new information," he said. "The brain is in a way to replace the memory formation is not efficient. Chronic, long-term stress is not good."

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