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The Biological Basis of Learning and Individuality

Elementary aspects of the neuronal mechanisms important for several different types of learning can now be studied on the cellular and even on the molecular level. Researchers agree that [some] forms of learning and memory require a conscious record. These types of learning are commonly called declarative or explicit. Those forms of learning that do not utilize conscious participation are referred to as non-declarative or implicit.

Explicit learning is fast and may take place after only one training trial. It often involves association of simultaneous stimuli and permits storage of information about a single event that happens in a particular time and place; it therefore affords a sense of familiarity about previous events. In contrast, implicit learning is slow and accumulates through repetition over many trials. It often involves association of sequential stimuli and permits storage of information about predictive relations between events. Implicit learning is expressed primarily by improved performance on certain tasks without the subject being able to describe just what has been learned, and it involves memory systems that do not draw on the contents of the general knowledge of the individual.

The existence of two distinct forms of learning has caused the reductionists among neurobiologists to ask whether there is a representation on the cellular level for each of these two types of learning process. Canadian psychologist Donald O. Hebb boldly suggested that associative learning could be produced by a simple cellular mechanism. He proposed that associations could be formed by coincident neural activity: “When an axon of cell A ... excite[s] cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A’s efficacy, as one of the cells firing B, is increased.” According to Hebb’s learning rule, coincident activity in the presynaptic and postsynaptic neurons, is critical for strengthening the connection between them (a so-called pre-post associative mechanism).

Five stranded snorkellers rescued from tiny island off Australia after their huge SOS message was spotted by helicopter.

(Adam Withnall / Wednesday 23 April 2014)

Five snorkellers stranded on a tiny island off
the east coast of Australia have been rescued after
scrawling a giant SOS message into a nearby
sandbank.

[05] The group had been stuck out at sea for more
than nine hours after their boat’s anchor failed and
it drifted away.

They had been swimming around a remote
sandbar near Wigton Island, Queensland, when the
[10] vessel started shifting - with their mobile phones,
clothes, water and sunscreen all still on board – and
it had moved beyond reach before they had time to
react.

Speaking to the Courier-Mail about the ordeal
[15] yesterday, Lyn Forbes-Smith described how she, a
female friend and three male friends were facing
the prospect of a long, cold night surrounded by
ocean when they finally spotted an approaching
rescue helicopter.

[20] “We had sort of made plans about what we’d
do on the rock for the evening,” she said.

“We had reef walkers on thankfully, but we
had no food, water, cream, no hats, not much at all.
We just looked for the highest ground, we looked
for rocks where five of us could huddle together
[25] because we didn’t really want to separate, and we
wanted to be out of the wind as best as possible.”

Ms Forbes-Smith explained that they were
concerned the sandbar – and their message – would
[30] go under with the tide, but that they were
“reasonably confident” someone would come
looking when friends realised they had not
returned.

The group had set off from Keswick Island
[35] towards Wigton Island at around 8am for the
snorkelling trip, and it was around 5pm when they
first saw signs of help approaching.

Another member of the group, Craig Gilbert,
told ABC News of their joy at spotting an RACQ
[40] rescue helicopter.

“We saw the helicopter and we thought, 'Oh,
you beauty' - and then it disappeared and we
thought, 'Oh no - we better look out for our beds
for the night' - then it came back probably 20
minutes later,” he said.

Rescue helicopter crew member Damien
[45] Kross said the five were treated for sunburn and
dehydration, but were otherwise “fine”.

“They were a little bit dehydrated but we
winched them to safety and brought them back here
to Mackay on the mainland] for just to have a
[50] quick medical attention and they were all fine.”

Rubem Alves was born on September 15, 1933 in Boa Esperança, when the city was still called Dores da Boa Esperança, in Minas Gerais. After high school, he studied theology at Seminário Presbiteriano do Sul. After graduating, he returned to his home state to serve as pastor amid the simple and poor people.

After a period of study in New York, he returned to Brazil after the military coup in 1964 and was denounced as subversive by the Presbyterian Church. To escape those who were persecuting him, he returned to the United States with his family. There, at the invitation of the United Presbyterian Church - USA and the president of Princeton Theological Seminary, he wrote his doctoral thesis entitled "Towards a Theology of Liberation".

He returned to Brazil with a Ph.D, broke with the Presbyterian Church, and became unemployed. He went to work teaching in higher education at the Faculdade de Filosofia Ciências e Letras in Rio Claro, and, starting in 1974, was a professor at Unicamp until his retirement.

In 1959, he married Lídia Nopper and they had two sons and a daughter together. Thanks to the girl, he began writing stories for children. He devoted himself to literature and poetry, understanding that both were food for the body and pleasing to the soul. Writing fulfilled his frustrated dream of being a pianist. He channeled into words the gift he lacked for musical notes.

Inspired by Albert Camus, Nietzsche, Jorge Luis Borges, Roland Barthes, Fernando Pessoa and Manoel de Barros, among many others, he became one of the most prolific and beloved Brazilian writers.

His opus includes more than a hundred books, divided among children’s books, chronicles, education, religion, theology and even biography, and the book “O velho que acordou menino” (2005), which narrates memories of his childhood.

In the 1980’s, he became a psychoanalyst, calling himself heterodox since he believed that beauty inhabited the depths of the unconscious. He had his own clinic until 2004 and drew inspiration from his patients for many of his chronicles. In a statement published on Rubem Alves’ web site, Leonardo Boff said his friend "became a master with original points of view on many different subjects. He can speak poetically about the prosaic and prosaically about poetry. In my opinion, he is one of those who has the best command of the Portuguese language in our generation, with an elegance and lightness of style that truly fascinates us."

Read the following dialogue.

A:I say, I say. How do you know that owls are cleverer than chickens?

B: I don'tknow. How do you know thatowils are cleverer than chickens?

A: Have you ever heard of Kentucky Fried Owl?

Nessun Dorma by Pavarotti

A Look at Luciano Pavarotti's Performance of "Nessun Dorma"

Luciano Pavarotti was certainly no one hit wonder, but for many people outside of the classical music world, it's his performance of "Nessun Dorma" that they know. Why? Most likely because of his performance of the aria from Puccini’s opera, Turandot, during the 1990 FIFA World Cup, which was the tournament's theme song. Millions of people had tuned in to see the event, and besides getting an eyeful of soccer, they got an earful of Luciano Pavarotti.

Most people, even those who know nothing about classical music and opera, if given recordings of three different tenors without knowing who's who, will pick Pavarotti as the best singer hands down. "Nessun Dorma" is a difficult song to sing, but Pavarotti sure had an easy time doing it. He sings it with such ease, such clarity, it's unreal. Other singers just don't measure up. Need proof? Check it out on YouTube videos of various singers and Pavarotti. Listen for the differences among Paul Potts, Andrea Bocelli, Jussi Bjorling and Franco Corelli.

Let's start with Paul Potts' performance on the popular television show, Britain's Got Talent.

Apart from the apparent lack of training, he has a lovely voice, but that's just not enough to do justice to such a beautiful and powerful aria. It's like if "Nessun Dorma" was a diamond ring, he just delivered it to you in a brown paper sack filled with mud. Andre Bocelli, a singer to whom Pavarotti gave his personal approval, has a beautiful voice with clarity and warm tone, however, his performance lacks energy, as if it's without life or meaning. Jussi Bjorling's performance is probably the second best I've heard. His voice is just as bright as Pavarotti's, but his phrasing isn't as good. Franco Corelli, too, has a beautiful voice with a well-rounded tone, but his vowels are much darker. There's also heaviness to his voice, which sometimes pulls his notes slightly under pitch. I know everyone is entitled to their own opinion, but it's hard to say Pavarotti's performance isn't anything short of amazing.

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The Biological Basis of Learning and Individuality

Elementary aspects of the neuronal mechanisms important for several different types of learning can now be studied on the cellular and even on the molecular level. Researchers agree that [some] forms of learning and memory require a conscious record. These types of learning are commonly called declarative or explicit. Those forms of learning that do not utilize conscious participation are referred to as non-declarative or implicit.

Explicit learning is fast and may take place after only one training trial. It often involves association of simultaneous stimuli and permits storage of information about a single event that happens in a particular time and place; it therefore affords a sense of familiarity about previous events. In contrast, implicit learning is slow and accumulates through repetition over many trials. It often involves association of sequential stimuli and permits storage of information about predictive relations between events. Implicit learning is expressed primarily by improved performance on certain tasks without the subject being able to describe just what has been learned, and it involves memory systems that do not draw on the contents of the general knowledge of the individual.

The existence of two distinct forms of learning has caused the reductionists among neurobiologists to ask whether there is a representation on the cellular level for each of these two types of learning process. Canadian psychologist Donald O. Hebb boldly suggested that associative learning could be produced by a simple cellular mechanism. He proposed that associations could be formed by coincident neural activity: “When an axon of cell A ... excite[s] cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A’s efficacy, as one of the cells firing B, is increased.” According to Hebb’s learning rule, coincident activity in the presynaptic and postsynaptic neurons, is critical for strengthening the connection between them (a so-called pre-post associative mechanism).

Read the following passage to answer question.

In order to get access to the inner working of the brain, researchers recruited 12 men and 4 women who were setto undergo surgery for malignant brain tumors. During neurosurgery, researchers attached electrodes to each participant's Broca's area — the part of the brain responsible for speech production -to monitor its activity during a series of tests. Participants were fully conscious during the tests and surgery was performed using local anesthesia.

In the first part of the test, participants read Italian words and phrases out loud while researchers measured both the sound waves of the speech and electrical signals in the brain. In the second partofthe test, participants silently read the same words and phrases thatthey had just spoken.
An interesting pattern emerged. When reading aloud, patients showed activity in Broca's area that corresponded to the sound frequencies of the words. And when reading silently, their brains also mimicked the sound frequencies of each phrase. Atan anatomical level, then, reading silently is the brain internally speaking to itself.

Read the following text to answer question.

Shopping on the Internet will have a disastrous effect on American cities and states, warn researchers from the University of California, Berkeley. They will lose billions of dollars in sales taxes because people are buying goods from outoftown, outof state, or even from abroad.

American cities and states rely heavily on local sales taxes. Sales by telephone and mail already cost states around $ 3 billion in lost taxes each year. But the Internet could bring about a new hemorrhage of revenues, warns Nathan Newman ofthe University's Center for Economic Research. “At the push of a button, consumers will have access to the lowest-priced goods nationwide and, with the added bonus of avoiding sales taxes, interstate sales may explode over the Internet, leaving state and local government finances in tatters”, he says.

Read the following text about the question.

A little bird

My parrot told me this story:

“When my friend, the girl Sacha, was six years old, she found a nest in the garden. Inside the nest there was a small colored egg. Sacha was amazed. In the following week, she returned to the nest and she saw a little bird and the egg was broken. The little bird was born free to fly. It was Sunday and Sacha gave him a house, water, food and much affection, but those cares were in vain, because the house was a prison. On Monday, She told me that the right and left wings were broken and she cried. In the following day, the little bird died. Sacha was not the mother of the bird. The body she buried in the garden and the soul, this one flew to the sky of the little birds!”

Then, my parrot always will say to me:

“…let the bird in the nest, let the animal in his own place and give me sunflower seeds.”

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Going to the gym is good for you, right? Well, that depends. Anew survey shows that one in three gym goers don't even break a sweat when they work out. Why? Because they're too busy chatting to friends trying to meet a partner, or hanging out in the sauna. “This research shows that not all gym users are making the most of their time at the gym, said Paul Bevington of Kettlers, a company that sells fitness equipment. While half of gym members go to the gym to get a serious workout many sign up for different reasons. According to the survey, 10% of people join their local gym to find a partner, while another 10% do so because working out is trendy. Also, 39% of men said they didn't know how to use some of the fitness machines at their gym, and were too embarrassed to ask. Ahandful of respondents also said they were too ashamed to sweat. Finally, 13% of those surveyed said they sometimes tell friends and family they're going to the gym, but actually go somewhere else.