Cevnautas da Genética,
Seria bom ouvir o comentário dos especialistas. Quem levantou a bola foi a turma da psicologia, focando na atividade física, motivação para o exercício e maturação neuronal. Que tal? Laercio
Resumo:
A eventual ligação entre a predisposição genética para níveis elevados de motivação para fazer exercício e a velocidade com que ocorre a maturação mental, foi encontrado pelos pesquisadores. Estes cientistas estudaram os cérebros dos ratos e encontraram níveis muito mais altos de maturação neural no cérebro dos ratos ativos do que nos cérebros dos ratos preguiçosos.
Date: April 15, 2014
Source: University of Missouri-Columbia
Summary:
A potential link between the genetic pre-disposition for high levels of exercise motivation and the speed at which mental maturation occurs has been found by researchers. These scientists studied the brains of the rats and found much higher levels of neural maturation in the brains of the active rats than in the brains of the lazy rats.
University of Missouri researchers have previously shown that a genetic pre-disposition to be more or less motivated to exercise exists. In a new study, Frank Booth, a professor in the MU College of Veterinary Medicine, has found a potential link between the genetic pre-disposition for high levels of exercise motivation and the speed at which mental maturation occurs.
For his study, Booth selectively bred rats that exhibited traits of either extreme activity or extreme laziness. Booth then put the rats in cages with running wheels and measured how much each rat willingly ran on their wheels during a six-day period. He then bred the top 26 runners with each other and bred the 26 rats that ran the least with each other. They repeated this process through 10 generations and found that the line of running rats chose to run 10 times more than the line of "lazy" rats.
Booth studied the brains of the rats and found much higher levels of neural maturation in the brains of the active rats than in the brains of the lazy rats.
"We looked at the part of the brain known as the 'grand central station,' or the hub where the brain is constantly sending and receiving signals," Booth said. "We found a big difference between the amount of molecules present in the brains of active rats compared to the brains of lazy rats. This suggests that the active rats were experiencing faster development of neural pathways than the lazy rats."
Booth says these findings may suggest a link between the genes responsible for exercise motivation and the genes responsible for mental development. He also says this research hints that exercising at a young age could help develop more neural pathways for motivation to be physically active.
"This study illustrates a potentially important link between exercise and the development of these neural pathways," Booth said. "Ultimately, this could show the benefits of exercise for mental development in humans, especially young children with constantly growing brains."
Booth's study, "Nucleus accumbens neuronal maturation differences in young rats bred for low versus high voluntary running behavior," was published in the Journal of Physiology.
Story Source:
The above story is based on materials provided by University of Missouri-Columbia. Note: Materials may be edited for content and length.
Journal Reference:
M. D. Roberts, R. G. Toedebusch, K. D. Wells, J. M. Company, J. D. Brown, C. L. Cruthirds, A. J. Heese, C. Zhu, G. E. Rottinghaus, T. E. Childs, F. W. Booth. Nucleus accumbens neuronal maturation differences in young rats bred for low versus high voluntary running behavior. The Journal of Physiology, 2014; DOI: 10.1113/jphysiol.2013.268805
FONTE com links: http://www.sciencedaily.com/releases/2014/04/140415125659.htm
Comentários
Por
Rodrigo Freire Guimarães
em 16 de Abril de 2014 às 12:45.
Poderiam ser esses genes mutáveis?
Pois a motivação é algo que pode vir a ser trabalhado psicologicamente.
Então, no caso de alguém que -motivada- saiu do sedentarismo e começou a prática de atividades fisicas constantes, ela passaria para as próximas gerações os "genes preguiçosos" (no caso de uma pessoa com histórico genético sedentário) ou o gene" preguiçoso" que mutou em um "gene motivado(ativo)"?
Desculpem a abordagem simplista da pergunta, mas acho que me fiz entender.
Aguardo respostas!
Abraço, Cevnautas!
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