Questões aplicadas na prova de 2012, cada uma em página própria com enunciado, alternativas e gabarito.
2.385 questões encontradas. Mostrando a página 41 de 120.
Texto 3
O meu guri
Texto 3
O meu guri
Texto 3
O meu guri
Texto 3
O meu guri
Texto 2
(O texto 2 foi extraído da obra Capitães da areia, de Jorge Amado, que conta a triste história de um grupo de crianças e adolescentes que vivem na rua, conhecidos como “capitães da areia”. À noite, recolhem-se para dormir num velho trapiche abandonado. O grupo pratica pequenos furtos para sobreviver, e seus membros se unem para defender-se da perseguição da polícia. Quando presos, são encaminhados para reformatórios, onde sofrem toda sorte de abusos.
O grupo, formado somente de meninos, recebeu, um dia, uma menina chamada Dora, de treze para catorze anos, cuja mãe morrera. Com o irmão, Zé Fuinha, ela foi para a rua, onde conheceu a turma dos Capitães da Areia e nela se integrou. Dora, uma menina loura e bonita, disposta para o trabalho, acabou conquistando todos: era mãe para os pequenos, e amiga e irmã para os mais velhos, alguns dos quais se apaixonaram por ela. Mas ela amava mesmo era o chefe dos Capitães, o valente Pedro Bala. Presa e recolhida a um orfanato, até que o namorado a resgatasse e a levasse para o velho trapiche, adoeceu e morreu. Horas antes de morrer, pediu a Pedro Bala que a fizesse mulher. Ele hesitou porque a via muito doente, mas, por fim, atendeu ao seu pedido. Na manhã seguinte, ela estava morta.
O capítulo que você vai ler narra a reação desesperada de Pedro Bala logo depois que levam o corpo de sua amada para alto mar, onde finalmente repousará.)
Texto 2
(O texto 2 foi extraído da obra Capitães da areia, de Jorge Amado, que conta a triste história de um grupo de crianças e adolescentes que vivem na rua, conhecidos como “capitães da areia”. À noite, recolhem-se para dormir num velho trapiche abandonado. O grupo pratica pequenos furtos para sobreviver, e seus membros se unem para defender-se da perseguição da polícia. Quando presos, são encaminhados para reformatórios, onde sofrem toda sorte de abusos.
O grupo, formado somente de meninos, recebeu, um dia, uma menina chamada Dora, de treze para catorze anos, cuja mãe morrera. Com o irmão, Zé Fuinha, ela foi para a rua, onde conheceu a turma dos Capitães da Areia e nela se integrou. Dora, uma menina loura e bonita, disposta para o trabalho, acabou conquistando todos: era mãe para os pequenos, e amiga e irmã para os mais velhos, alguns dos quais se apaixonaram por ela. Mas ela amava mesmo era o chefe dos Capitães, o valente Pedro Bala. Presa e recolhida a um orfanato, até que o namorado a resgatasse e a levasse para o velho trapiche, adoeceu e morreu. Horas antes de morrer, pediu a Pedro Bala que a fizesse mulher. Ele hesitou porque a via muito doente, mas, por fim, atendeu ao seu pedido. Na manhã seguinte, ela estava morta.
O capítulo que você vai ler narra a reação desesperada de Pedro Bala logo depois que levam o corpo de sua amada para alto mar, onde finalmente repousará.)
Marque V ou F conforme seja verdadeiro ou falso o que se diz sobre o texto.
( ) O primeiro parágrafo (linhas 87-95) é independente em relação ao restante do texto, no entanto os outros parágrafos retomam direta ou indiretamente as informações por ele passadas.
( ) O primeiro parágrafo é importante na medida em que oferece elementos que indiretamente irão valorizar Dora.
( ) A narrativa é feita em terceira pessoa, mas, entre as linhas 106 e 120, encontra-se o discurso indireto livre — uma forma de valorizar a posição da personagem e dar mais credibilidade à palavra que revela o interior dela.
( ) Dora teve o direito de virar estrela apenas porque muito amou Pedro Bala, que era para ela um herói. Era como se ela ocupasse o lugar dele.
( ) Pedro Bala estava determinado a buscar a morte, mas não teve coragem de ir até o fim.
Está correta, de cima para baixo, a sequência seguinte:
Texto 1
Cem anos de Jorge Amado, o contador de histórias
Por Rachel Bertol, no Valor Econômico
Texto 1
Cem anos de Jorge Amado, o contador de histórias
Por Rachel Bertol, no Valor Econômico
Atente aos comentários feitos entre as linhas 58 e 63, e ao que se pode concluir deles.
I. O cinema é uma arte menor.
II. Foi perniciosa a influência do cinema sobre a literatura.
III. O cinema enfatiza a história.
Está correto o que se diz em
Texto 1
Cem anos de Jorge Amado, o contador de histórias
Por Rachel Bertol, no Valor Econômico
Considerando-se a abordagem do texto sobre os problemas enfrentados pela crítica literária, estabelecem-se as seguintes conclusões:
I. Determinar as consequências da centralização da literatura na história.
II. Mensurar a influência do partido comunista sobre o sucesso dos escritores a ele filiados.
III. Demarcar os limites entre a boa literatura que traz ingredientes populares e a literatura que peca pelo apelo ao popular.
Está correto o que se diz apenas em
Texto 1
Cem anos de Jorge Amado, o contador de histórias
Por Rachel Bertol, no Valor Econômico
O texto trabalha com algumas bipolaridades. Escreva V ou F conforme a polaridade esteja ou não no texto.
( ) literatura realista vs. literatura não realista
( ) paixão vs. frieza dos leitores
( ) criação de personagens marcantes vs. não criação de personagens marcantes
( ) literatura popular vs. literatura não popular
( ) gosto popular vs. opinião da crítica
Está correta, de cima para baixo, a seguinte
sequência:
TEXT
MORE and more retired people are heading back to the nearest classroom — as students and, in some cases, teachers — and they are finding out that school can be lovelier the second time around. Some may be thinking of second careers, but most just want to keep their minds stimulated, learn something new or catch up with a subject they were always curious about but never had time for.
For many, at least part of the motivation is based on widespread reports that exercising the brain may preserve it, forestalling mental decline and maybe even Alzheimer’s disease and other types of dementia. Is there any truth to it? And if there is, what type of learning is best suited to the older brain?
Many studies do find that being mentally active is associated with a lower risk of Alzheimer’s disease. But the standard caveat applies: association does not prove cause and effect, and there is always the chance that the mentally active people who never got Alzheimer’s simply had healthier brains to begin with. Even, so, researchers say, there is no harm in telling people to try to stay engaged.
“When you and I are having this conversation, you’re taking notes, thinking, remembering pieces of it, trying to relate it to other things,” said Arthur Toga, a professor of neurology and director of the laboratory of neuroimaging at the University of California, Los Angeles. “You’re changing the circuitry in your brain. That is because you have changed something in your brain to retain that memory.”
Dr. Toga elaborated: “The conversation requires nerve cells in the brain to fire, and when they fire they are using energy. More oxygen and sugar must be delivered, by increased blood flow to those regions.
“Why would that be good? If you are vasodilating, delivering more blood to certain regions of the brain, that is important. It increases the longevity and the health of those circuits. In adults, if I ask you to perform tasks you’ve never done before, the amount of brain it takes for you to try and do it is far greater than the amount of brain it takes for you to do something you’re already good at. So yes, exercising the brain is good.” Playing video games probably qualifies as a type of brain exercise, he said, though older people might not sharpen their skills as fast as younger ones do.
Dr. Toga warned that while using the brain might help avert some of the mental slowing that normally comes with aging, it had its limits. “I do not believe that it forestalls degenerative disease, however,” he said. “That’s a different process.”
But research continues. Dr. William Jagust, a professor of public health and neuroscience at the University of California, Berkeley, said there were two main theories that tried to explain why exercising the brain might make it more resistant to disease. One is the “cognitive reserve” theory, which says that if the brain is in the best possible shape with extensive neuronal connections from being used a lot, it may be able to withstand the onset of Alzheimer’s disease for a while and symptoms may take longer to develop.
A hallmark of Alzheimer’s is deposits in the brain of an abnormal form of a protein called amyloid. “A paper we published showed that people who were more cognitively active over their whole life span had less amyloid,” Dr. Jagust said.
“My interpretation is that people who are more cognitively active have more efficient brains,” Dr. Jagust said. “What seems to happen in aging is that older people seem to have less efficient brains.” A scan of brain activity on a 20- year-old being asked to remember something will show less activity needed than in an 80-year-old asked to perform the same task.
“Older people seem to activate or bring on line brain areas that young people don’t use,” Dr. Jagust said. “They have to work their brains harder. So people who stay cognitively active may use their brains more efficiently.” That way, they may generate fewer amyloid deposits. But he emphasized that being mentally active throughout life — not just in old age — was what mattered.
Nonetheless, Dr. Jagust acknowledged, “this is all theoretical.”
It is a good idea to try something new.
“A variety of things is important,” Dr. Toga said. “We try to encourage people to do certain things because it couldn’t hurt and may be good.Retaining lots of social interaction is really important. It involves so much of the brain. You have to interpret facial expressions and understand new concepts.
[...]
One of the largest programs for retirees is at the University of Wisconsin, Green Bay (it is not associated with Osher). Called Learning in Retirement, it is sponsored by the university, with more than 1,000 members and more than 240 courses a year. Michael W. Murphy, who spent more than 30 years as an English professor, said this program had brought him some of the greatest joy he had experienced in the classroom. Since 2001, when he stepped down from his post as acting dean at the university, he has been teaching poetry and other subjects to Learning in Retirement members. It is an unpaid position. “I’ve always enjoyed teaching, and the idea of teaching without having to read papers, correct tests and worst of all, give out grades, was really appealing,” Dr. Murphy said.
To his delight, the students actually want to be there. They take the time to tell him how much they appreciate him and sometimes even break into applause after his lectures. The students include doctors, lawyers, professors and highschool dropouts. “The biggest problem I had teaching 18-year-olds was a kind of general apathy,” Dr. Murphy said. “They were looking forward to a career in high finance and I was trying to teach them to appreciate Tennyson. The fact that these people show up, and toddle in or waddle in, some with their walkers or wheelchairs, it’s heartwarming.”
www.nytimes.com/, March 7, 2012
One cause of Dr. Murphy’s delight is the fact that in the “Learning in Retirement” programTEXT
MORE and more retired people are heading back to the nearest classroom — as students and, in some cases, teachers — and they are finding out that school can be lovelier the second time around. Some may be thinking of second careers, but most just want to keep their minds stimulated, learn something new or catch up with a subject they were always curious about but never had time for.
For many, at least part of the motivation is based on widespread reports that exercising the brain may preserve it, forestalling mental decline and maybe even Alzheimer’s disease and other types of dementia. Is there any truth to it? And if there is, what type of learning is best suited to the older brain?
Many studies do find that being mentally active is associated with a lower risk of Alzheimer’s disease. But the standard caveat applies: association does not prove cause and effect, and there is always the chance that the mentally active people who never got Alzheimer’s simply had healthier brains to begin with. Even, so, researchers say, there is no harm in telling people to try to stay engaged.
“When you and I are having this conversation, you’re taking notes, thinking, remembering pieces of it, trying to relate it to other things,” said Arthur Toga, a professor of neurology and director of the laboratory of neuroimaging at the University of California, Los Angeles. “You’re changing the circuitry in your brain. That is because you have changed something in your brain to retain that memory.”
Dr. Toga elaborated: “The conversation requires nerve cells in the brain to fire, and when they fire they are using energy. More oxygen and sugar must be delivered, by increased blood flow to those regions.
“Why would that be good? If you are vasodilating, delivering more blood to certain regions of the brain, that is important. It increases the longevity and the health of those circuits. In adults, if I ask you to perform tasks you’ve never done before, the amount of brain it takes for you to try and do it is far greater than the amount of brain it takes for you to do something you’re already good at. So yes, exercising the brain is good.” Playing video games probably qualifies as a type of brain exercise, he said, though older people might not sharpen their skills as fast as younger ones do.
Dr. Toga warned that while using the brain might help avert some of the mental slowing that normally comes with aging, it had its limits. “I do not believe that it forestalls degenerative disease, however,” he said. “That’s a different process.”
But research continues. Dr. William Jagust, a professor of public health and neuroscience at the University of California, Berkeley, said there were two main theories that tried to explain why exercising the brain might make it more resistant to disease. One is the “cognitive reserve” theory, which says that if the brain is in the best possible shape with extensive neuronal connections from being used a lot, it may be able to withstand the onset of Alzheimer’s disease for a while and symptoms may take longer to develop.
A hallmark of Alzheimer’s is deposits in the brain of an abnormal form of a protein called amyloid. “A paper we published showed that people who were more cognitively active over their whole life span had less amyloid,” Dr. Jagust said.
“My interpretation is that people who are more cognitively active have more efficient brains,” Dr. Jagust said. “What seems to happen in aging is that older people seem to have less efficient brains.” A scan of brain activity on a 20- year-old being asked to remember something will show less activity needed than in an 80-year-old asked to perform the same task.
“Older people seem to activate or bring on line brain areas that young people don’t use,” Dr. Jagust said. “They have to work their brains harder. So people who stay cognitively active may use their brains more efficiently.” That way, they may generate fewer amyloid deposits. But he emphasized that being mentally active throughout life — not just in old age — was what mattered.
Nonetheless, Dr. Jagust acknowledged, “this is all theoretical.”
It is a good idea to try something new.
“A variety of things is important,” Dr. Toga said. “We try to encourage people to do certain things because it couldn’t hurt and may be good.Retaining lots of social interaction is really important. It involves so much of the brain. You have to interpret facial expressions and understand new concepts.
[...]
One of the largest programs for retirees is at the University of Wisconsin, Green Bay (it is not associated with Osher). Called Learning in Retirement, it is sponsored by the university, with more than 1,000 members and more than 240 courses a year. Michael W. Murphy, who spent more than 30 years as an English professor, said this program had brought him some of the greatest joy he had experienced in the classroom. Since 2001, when he stepped down from his post as acting dean at the university, he has been teaching poetry and other subjects to Learning in Retirement members. It is an unpaid position. “I’ve always enjoyed teaching, and the idea of teaching without having to read papers, correct tests and worst of all, give out grades, was really appealing,” Dr. Murphy said.
To his delight, the students actually want to be there. They take the time to tell him how much they appreciate him and sometimes even break into applause after his lectures. The students include doctors, lawyers, professors and highschool dropouts. “The biggest problem I had teaching 18-year-olds was a kind of general apathy,” Dr. Murphy said. “They were looking forward to a career in high finance and I was trying to teach them to appreciate Tennyson. The fact that these people show up, and toddle in or waddle in, some with their walkers or wheelchairs, it’s heartwarming.”
www.nytimes.com/, March 7, 2012
The “Learning in Retirement” program of the university of WisconsinTEXT
MORE and more retired people are heading back to the nearest classroom — as students and, in some cases, teachers — and they are finding out that school can be lovelier the second time around. Some may be thinking of second careers, but most just want to keep their minds stimulated, learn something new or catch up with a subject they were always curious about but never had time for.
For many, at least part of the motivation is based on widespread reports that exercising the brain may preserve it, forestalling mental decline and maybe even Alzheimer’s disease and other types of dementia. Is there any truth to it? And if there is, what type of learning is best suited to the older brain?
Many studies do find that being mentally active is associated with a lower risk of Alzheimer’s disease. But the standard caveat applies: association does not prove cause and effect, and there is always the chance that the mentally active people who never got Alzheimer’s simply had healthier brains to begin with. Even, so, researchers say, there is no harm in telling people to try to stay engaged.
“When you and I are having this conversation, you’re taking notes, thinking, remembering pieces of it, trying to relate it to other things,” said Arthur Toga, a professor of neurology and director of the laboratory of neuroimaging at the University of California, Los Angeles. “You’re changing the circuitry in your brain. That is because you have changed something in your brain to retain that memory.”
Dr. Toga elaborated: “The conversation requires nerve cells in the brain to fire, and when they fire they are using energy. More oxygen and sugar must be delivered, by increased blood flow to those regions.
“Why would that be good? If you are vasodilating, delivering more blood to certain regions of the brain, that is important. It increases the longevity and the health of those circuits. In adults, if I ask you to perform tasks you’ve never done before, the amount of brain it takes for you to try and do it is far greater than the amount of brain it takes for you to do something you’re already good at. So yes, exercising the brain is good.” Playing video games probably qualifies as a type of brain exercise, he said, though older people might not sharpen their skills as fast as younger ones do.
Dr. Toga warned that while using the brain might help avert some of the mental slowing that normally comes with aging, it had its limits. “I do not believe that it forestalls degenerative disease, however,” he said. “That’s a different process.”
But research continues. Dr. William Jagust, a professor of public health and neuroscience at the University of California, Berkeley, said there were two main theories that tried to explain why exercising the brain might make it more resistant to disease. One is the “cognitive reserve” theory, which says that if the brain is in the best possible shape with extensive neuronal connections from being used a lot, it may be able to withstand the onset of Alzheimer’s disease for a while and symptoms may take longer to develop.
A hallmark of Alzheimer’s is deposits in the brain of an abnormal form of a protein called amyloid. “A paper we published showed that people who were more cognitively active over their whole life span had less amyloid,” Dr. Jagust said.
“My interpretation is that people who are more cognitively active have more efficient brains,” Dr. Jagust said. “What seems to happen in aging is that older people seem to have less efficient brains.” A scan of brain activity on a 20- year-old being asked to remember something will show less activity needed than in an 80-year-old asked to perform the same task.
“Older people seem to activate or bring on line brain areas that young people don’t use,” Dr. Jagust said. “They have to work their brains harder. So people who stay cognitively active may use their brains more efficiently.” That way, they may generate fewer amyloid deposits. But he emphasized that being mentally active throughout life — not just in old age — was what mattered.
Nonetheless, Dr. Jagust acknowledged, “this is all theoretical.”
It is a good idea to try something new.
“A variety of things is important,” Dr. Toga said. “We try to encourage people to do certain things because it couldn’t hurt and may be good.Retaining lots of social interaction is really important. It involves so much of the brain. You have to interpret facial expressions and understand new concepts.
[...]
One of the largest programs for retirees is at the University of Wisconsin, Green Bay (it is not associated with Osher). Called Learning in Retirement, it is sponsored by the university, with more than 1,000 members and more than 240 courses a year. Michael W. Murphy, who spent more than 30 years as an English professor, said this program had brought him some of the greatest joy he had experienced in the classroom. Since 2001, when he stepped down from his post as acting dean at the university, he has been teaching poetry and other subjects to Learning in Retirement members. It is an unpaid position. “I’ve always enjoyed teaching, and the idea of teaching without having to read papers, correct tests and worst of all, give out grades, was really appealing,” Dr. Murphy said.
To his delight, the students actually want to be there. They take the time to tell him how much they appreciate him and sometimes even break into applause after his lectures. The students include doctors, lawyers, professors and highschool dropouts. “The biggest problem I had teaching 18-year-olds was a kind of general apathy,” Dr. Murphy said. “They were looking forward to a career in high finance and I was trying to teach them to appreciate Tennyson. The fact that these people show up, and toddle in or waddle in, some with their walkers or wheelchairs, it’s heartwarming.”
www.nytimes.com/, March 7, 2012
TEXT
MORE and more retired people are heading back to the nearest classroom — as students and, in some cases, teachers — and they are finding out that school can be lovelier the second time around. Some may be thinking of second careers, but most just want to keep their minds stimulated, learn something new or catch up with a subject they were always curious about but never had time for.
For many, at least part of the motivation is based on widespread reports that exercising the brain may preserve it, forestalling mental decline and maybe even Alzheimer’s disease and other types of dementia. Is there any truth to it? And if there is, what type of learning is best suited to the older brain?
Many studies do find that being mentally active is associated with a lower risk of Alzheimer’s disease. But the standard caveat applies: association does not prove cause and effect, and there is always the chance that the mentally active people who never got Alzheimer’s simply had healthier brains to begin with. Even, so, researchers say, there is no harm in telling people to try to stay engaged.
“When you and I are having this conversation, you’re taking notes, thinking, remembering pieces of it, trying to relate it to other things,” said Arthur Toga, a professor of neurology and director of the laboratory of neuroimaging at the University of California, Los Angeles. “You’re changing the circuitry in your brain. That is because you have changed something in your brain to retain that memory.”
Dr. Toga elaborated: “The conversation requires nerve cells in the brain to fire, and when they fire they are using energy. More oxygen and sugar must be delivered, by increased blood flow to those regions.
“Why would that be good? If you are vasodilating, delivering more blood to certain regions of the brain, that is important. It increases the longevity and the health of those circuits. In adults, if I ask you to perform tasks you’ve never done before, the amount of brain it takes for you to try and do it is far greater than the amount of brain it takes for you to do something you’re already good at. So yes, exercising the brain is good.” Playing video games probably qualifies as a type of brain exercise, he said, though older people might not sharpen their skills as fast as younger ones do.
Dr. Toga warned that while using the brain might help avert some of the mental slowing that normally comes with aging, it had its limits. “I do not believe that it forestalls degenerative disease, however,” he said. “That’s a different process.”
But research continues. Dr. William Jagust, a professor of public health and neuroscience at the University of California, Berkeley, said there were two main theories that tried to explain why exercising the brain might make it more resistant to disease. One is the “cognitive reserve” theory, which says that if the brain is in the best possible shape with extensive neuronal connections from being used a lot, it may be able to withstand the onset of Alzheimer’s disease for a while and symptoms may take longer to develop.
A hallmark of Alzheimer’s is deposits in the brain of an abnormal form of a protein called amyloid. “A paper we published showed that people who were more cognitively active over their whole life span had less amyloid,” Dr. Jagust said.
“My interpretation is that people who are more cognitively active have more efficient brains,” Dr. Jagust said. “What seems to happen in aging is that older people seem to have less efficient brains.” A scan of brain activity on a 20- year-old being asked to remember something will show less activity needed than in an 80-year-old asked to perform the same task.
“Older people seem to activate or bring on line brain areas that young people don’t use,” Dr. Jagust said. “They have to work their brains harder. So people who stay cognitively active may use their brains more efficiently.” That way, they may generate fewer amyloid deposits. But he emphasized that being mentally active throughout life — not just in old age — was what mattered.
Nonetheless, Dr. Jagust acknowledged, “this is all theoretical.”
It is a good idea to try something new.
“A variety of things is important,” Dr. Toga said. “We try to encourage people to do certain things because it couldn’t hurt and may be good.Retaining lots of social interaction is really important. It involves so much of the brain. You have to interpret facial expressions and understand new concepts.
[...]
One of the largest programs for retirees is at the University of Wisconsin, Green Bay (it is not associated with Osher). Called Learning in Retirement, it is sponsored by the university, with more than 1,000 members and more than 240 courses a year. Michael W. Murphy, who spent more than 30 years as an English professor, said this program had brought him some of the greatest joy he had experienced in the classroom. Since 2001, when he stepped down from his post as acting dean at the university, he has been teaching poetry and other subjects to Learning in Retirement members. It is an unpaid position. “I’ve always enjoyed teaching, and the idea of teaching without having to read papers, correct tests and worst of all, give out grades, was really appealing,” Dr. Murphy said.
To his delight, the students actually want to be there. They take the time to tell him how much they appreciate him and sometimes even break into applause after his lectures. The students include doctors, lawyers, professors and highschool dropouts. “The biggest problem I had teaching 18-year-olds was a kind of general apathy,” Dr. Murphy said. “They were looking forward to a career in high finance and I was trying to teach them to appreciate Tennyson. The fact that these people show up, and toddle in or waddle in, some with their walkers or wheelchairs, it’s heartwarming.”
www.nytimes.com/, March 7, 2012
According to the text, mental decline and some kinds of dementia may be avoided if oneTEXT
MORE and more retired people are heading back to the nearest classroom — as students and, in some cases, teachers — and they are finding out that school can be lovelier the second time around. Some may be thinking of second careers, but most just want to keep their minds stimulated, learn something new or catch up with a subject they were always curious about but never had time for.
For many, at least part of the motivation is based on widespread reports that exercising the brain may preserve it, forestalling mental decline and maybe even Alzheimer’s disease and other types of dementia. Is there any truth to it? And if there is, what type of learning is best suited to the older brain?
Many studies do find that being mentally active is associated with a lower risk of Alzheimer’s disease. But the standard caveat applies: association does not prove cause and effect, and there is always the chance that the mentally active people who never got Alzheimer’s simply had healthier brains to begin with. Even, so, researchers say, there is no harm in telling people to try to stay engaged.
“When you and I are having this conversation, you’re taking notes, thinking, remembering pieces of it, trying to relate it to other things,” said Arthur Toga, a professor of neurology and director of the laboratory of neuroimaging at the University of California, Los Angeles. “You’re changing the circuitry in your brain. That is because you have changed something in your brain to retain that memory.”
Dr. Toga elaborated: “The conversation requires nerve cells in the brain to fire, and when they fire they are using energy. More oxygen and sugar must be delivered, by increased blood flow to those regions.
“Why would that be good? If you are vasodilating, delivering more blood to certain regions of the brain, that is important. It increases the longevity and the health of those circuits. In adults, if I ask you to perform tasks you’ve never done before, the amount of brain it takes for you to try and do it is far greater than the amount of brain it takes for you to do something you’re already good at. So yes, exercising the brain is good.” Playing video games probably qualifies as a type of brain exercise, he said, though older people might not sharpen their skills as fast as younger ones do.
Dr. Toga warned that while using the brain might help avert some of the mental slowing that normally comes with aging, it had its limits. “I do not believe that it forestalls degenerative disease, however,” he said. “That’s a different process.”
But research continues. Dr. William Jagust, a professor of public health and neuroscience at the University of California, Berkeley, said there were two main theories that tried to explain why exercising the brain might make it more resistant to disease. One is the “cognitive reserve” theory, which says that if the brain is in the best possible shape with extensive neuronal connections from being used a lot, it may be able to withstand the onset of Alzheimer’s disease for a while and symptoms may take longer to develop.
A hallmark of Alzheimer’s is deposits in the brain of an abnormal form of a protein called amyloid. “A paper we published showed that people who were more cognitively active over their whole life span had less amyloid,” Dr. Jagust said.
“My interpretation is that people who are more cognitively active have more efficient brains,” Dr. Jagust said. “What seems to happen in aging is that older people seem to have less efficient brains.” A scan of brain activity on a 20- year-old being asked to remember something will show less activity needed than in an 80-year-old asked to perform the same task.
“Older people seem to activate or bring on line brain areas that young people don’t use,” Dr. Jagust said. “They have to work their brains harder. So people who stay cognitively active may use their brains more efficiently.” That way, they may generate fewer amyloid deposits. But he emphasized that being mentally active throughout life — not just in old age — was what mattered.
Nonetheless, Dr. Jagust acknowledged, “this is all theoretical.”
It is a good idea to try something new.
“A variety of things is important,” Dr. Toga said. “We try to encourage people to do certain things because it couldn’t hurt and may be good.Retaining lots of social interaction is really important. It involves so much of the brain. You have to interpret facial expressions and understand new concepts.
[...]
One of the largest programs for retirees is at the University of Wisconsin, Green Bay (it is not associated with Osher). Called Learning in Retirement, it is sponsored by the university, with more than 1,000 members and more than 240 courses a year. Michael W. Murphy, who spent more than 30 years as an English professor, said this program had brought him some of the greatest joy he had experienced in the classroom. Since 2001, when he stepped down from his post as acting dean at the university, he has been teaching poetry and other subjects to Learning in Retirement members. It is an unpaid position. “I’ve always enjoyed teaching, and the idea of teaching without having to read papers, correct tests and worst of all, give out grades, was really appealing,” Dr. Murphy said.
To his delight, the students actually want to be there. They take the time to tell him how much they appreciate him and sometimes even break into applause after his lectures. The students include doctors, lawyers, professors and highschool dropouts. “The biggest problem I had teaching 18-year-olds was a kind of general apathy,” Dr. Murphy said. “They were looking forward to a career in high finance and I was trying to teach them to appreciate Tennyson. The fact that these people show up, and toddle in or waddle in, some with their walkers or wheelchairs, it’s heartwarming.”
www.nytimes.com/, March 7, 2012
One of the conclusions reached by Dr. Jagust
related to the brain was that
