Brain middle-aged people who are no longer agile as a young people's brain caused a;; the stree ever experienced. Similarly, a new study released on Tuesday (31 / 5) in the Journal of Neuroscience said.
Stress causes the brain nerve cells shrink and loss of plasticity (the ability to form relationships called synapses).
Results of research scientists United States that provide additional understanding about the aging process and why some people thinking ability is reduced more quickly than others.
"We suspect that the nerve cells (brain) changes due to age, but lose platisitas synapses in the context of life experience proved to have implications on the decline in thinking ability associated with age," said John Morrison of Mount Sinai School of Medicine.
Morrison and colleagues studied young rats, mice middle-aged and old mice are placed in an area for several hours, which can release stress hormones cause changes in brain cells in the prefrontal cortex or the brain that are used in the learning process.
The research team that examines changes in the brain cells called spines that are used to form synapses. When they saw through the microscope, they found changes in the spines of young rats, which suggests that they can adapt to stressful experiences.
Spines in the brains of middle-aged rats did not change much. While the spines of old rats nothing has changed.
From there concluded that the aging process causes a significant loss in the brain's ability to respond to stress, something very important in the learning process.
"Prefrontal cortex is constantly 'reconnect' in response to life experiences," said Morrison.
However, older brains are significantly losing spines, and if anyone still has, its ability less in response to situations that require the existence of 'reconnection' brain nerves.
"I will not attempt to learn the language (foreign)," Morrison said, given the brain's ability of parents to decline. "Some people can do it, but will not be like the kids abilities," said 58-year-old Morrison.
Fortunately though aging, a person will not lose his skill in doing something.
"You will not lose synapses and circuits that are very stable," said Morrison.
The findings are useful to better understand Alzheimer's disease. If you want to fight Alzheimer's, then one should do early prevention, said Morrison.
Alzheimer's a lot of attacking people who enter old age. Brain disease is shrinking in size and working ability of their brain decreased dramatically affecting the ability of other limbs. The patients, among others, will have difficulty in speaking, senile, unable to look after himself, it's hard to think, lost track of time and space, and easy to change interest, psychiatric conditions and personality .*
