TED Talk: Dr. Michael Merzenich on Rewiring the Brain

Dr. Michael Merzenich is a pioneer in brain plasticity research. In this TED Talk, recorded in 2004, Dr. Merzenich describes impairments to the brain’s processing ability, and how we can train the brain back to normal processing:

We now have a large body of literature that demonstrates that the fundamental problem that occurs in the majority of children that have early language impairments, and that are going to struggle to learn to read, is that their language processor is created in a defective form. And the reason that it rises in a defective form is because early in the baby’s brain’s life the machine process is noisy. It’s that simple. It’s a signal to noise problem. Okay? And there are a lot of things that contribute to that. There are numerous inherited faults that could make the machine process noisier.

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Every sound the child hears uncorrected is muffled. It’s degraded. The child’s native language is such a case is not English. It’s not Japanese. It’s muffled English. It’s degraded Japanese. It’s crap. And the brain specializes for it. It creates a representation of language crap. And then the child is stuck with it.

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Now the crap doesn’t just happen in the ear. It can also happen in the brain. The brain itself can be noisy. It’s commonly noisy. There are many inherited faults that can make it noisier. And the native language for a child with such a brain is degraded. It’s not English. It’s noisy English. And that results in defective representations of sounds of words, not normal, a different strategy, by a machine that has different space constants. And you can look in the brain of such a child and record those time constants. They are about an order of magnitude longer, about 11 times longer in duration on average, than in a normal child. Space constants are about three times greater. Such a child will have memory and cognitive deficits in this domain. Of course they will. Because as a receiver of language, they are receiving it and representing it. And in information it’s representing crap. And they are going to have poor reading skills. Because reading is dependent upon the translation of word sounds into this orthographic or visual representational form. If you don’t have a brain representation of word sounds that translation makes no sense. And you are going to have corresponding abnormal neurology.

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The point is is that you can train the brain out of this. A way to think about this is you can actually re-refine the processing capacity of the machinery by changing it. Changing it in detail. It takes about 30 hours on the average. And we’ve accomplished that in about 430,000 kids today. Actually about 15,000 children are being trained as we speak. And actually when you look at the impacts, the impacts are substantial.

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Think of a classroom of children in the language arts. Think of the children on the slow side of the class. We have the potential to move most of those children to the middle or to the right side. In addition to accurate language training it also fixes memory and cognition speech fluency and speech production, And an important language dependent skill is enabled by this training — that is to say reading. And to a large extent it fixes the brain. You can look down in the brain of a child. in a variety of tasks that scientists have at Stanford, and MIT, and UCSF, and UCLA, and a number of other institutions. And children operating in various language behaviors, or in various reading behaviors, you see for the most extent, for most children, their neuronal responses, complexly abnormal before you start, are normalized by the training.

There’s some stuff about monkeys in the middle that went a little over our heads, but the talk is worth the 20 minute investment.

Brain Foods

Family Education Network breaks down the top brain foods, which can improve your mood, thinking, and mental skills.

Some aren’t surprising (and won’t come as very welcome news to children): broccoli is a great source of vitamin K, which enhances cognitive function. And pinach improves learning capacity and motor skills while slowing down age-related brain function.

But there are a few pleasant surprises for those who don’t get too excited about eating their vegetables:

• Eggs contain choline, which boosts the memory center of the brain.
• Yogurt improves alertness and contains tyrosin, an amino acid that produces dopamine (a neurotransmitter).
• Walnuts contain vitamins E and B6, which are good for the nervous system, and fatty acids that help brain function.

And of course, the kicker: dark chocolate. It contains antioxidants and flavonoids that are great for the brain.

The full slide show is on the Family Education Network Web site. You might also be interested in these posts on our blog about brain-based eating:

• Blueberries on the Brain
• Nutrition and the Brain
• Eating chocolate can improve your math skills

Learning to Read vs. Reading to Learn

Around 2nd or 3rd grade, students begin the transition from learning to read to reading to learn. In the process, they open their minds to a flood of critical information across disciplines. And to incorporate this new knowledge, students must have mastered the basics of reading and achieved automaticity.

At Scientific Learning’s Science of Learning blog, Terri Zezula addresses the criticality of automaticity for students to begin the transition to reading to learn:

In achieving automaticity, we free our brains – our working memories – from the details of the task, allowing us to use that brain power to do more, building on those sets of automatic skills. For our students, achieving automaticity  in reading is essential not only to their becoming effective readers, but becoming effective all-around learners. The majority of students make the shift from “learning to read” to “reading to learn” around second or third grade. At this stage, their reading skills have developed to a point of automaticity where they no longer need to use their working memory to facilitate the task of reading, and they can use that memory for things like interpretation, comprehension and creative thinking.

On the other hand, continues Zezula:

Imagine what learning becomes for the struggling student who does not develop this automaticity alongside his or her fellow students. As others begin to learn more and more from their reading, the struggling reader must engage their working memory in the challenge of getting through the letters and words of each sentence as opposed to using that valuable memory to glean meanings and assimilate information. As their reading skills lag, their overall ability to learn suffers.

A previous post here at Thoughts from Be Amazing Learning addressed the same phenomemon:

We hear from parents a lot that their child does just fine with the mechanics of reading (decoding, spelling, etc.), but struggles with comprehension. Reading comprehension is a difficult task, as it represents the synthesis of so many language and literacy skills, from phonemic awareness to sequencing and working memory. As such, it takes time and a lot of practice to develop reading comprehension skills.

It’s important to note, however, that while kids may be struggling with comprehension, the root cause of their struggle may be more foundational in nature. For example, a child may decode well, but if his brain is working overtime on decoding, there may just not be anything left when it comes time to comprehend what he’s just read. Comprehension requires things like a working memory that’s developed enough to remember the beginning of a sentence when you get to the end. Or the first sentence of a paragraph when you get to the last. But if we can get a child’s brain to process more efficiently, the mechanics of reading become easier, which frees up energy for more complex tasks like comprehension.

The good news is that we can help kids’ brains process more efficiently. Just like we exercise our bodies in the gym or on the track to build physical fitness, we can build brain fitness through targeted exercises that adapt to our abilities. If you have a child struggling with reading comprehension or other learning challenges, visit our Web site at http://www.beamazinglearning.com or call (800) 792-4809 to learn how developing foundational cognitive skills can help your child successfully make the transition to reading to learn.

Moonwalking with Einstein

Last weekend’s NY Times Magazine featured an excerpt from journalist Joshua Foer’s new book Moonwalking with Einstein: The Art and Science of Remembering Everything. It’s the fascinating story of his quest to become the memory champion of the United States (add that to the list of things we didn’t know anything about).

As we’ve previously posted, there’s an important distinction between memory and memorization. Nonetheless, memorization techniques can give us clues about memory, particularly from an evolutionary standpoint. For example, Foer highlights a study that showed that expert memorizers have neither anatomically distinguishable brains nor above average levels of cognitive abilities. But what they do share is a higher level of activation in the area of the brain responsible for visual and spatial memory. Experts attribute this to the fact that our ancestors relied on visual spatial memory for survival (where’s the food? where are the predators?).

Foer’s journey to the title is interesting, at least in part because he really set out just to learn about memorization and ended up a champion. The Times article links to two resources for memorizing numbers and names. For more on Foer, check out this story by NPR’s All Things Considered.

The pen is mightier than the keyboard

If you want to learn, scientists say, put pen to paper.

A recent article in Business Week cited research in France and Norway, which concluded that “writing by hand is actually a very different sensory experience than typing on a keyboard, with each activating distinctly different parts of the brain.”

Study co-author, associate professor Anne Mangen from the University of Stavangers Reading Centre in Stavanger, Norway, says:

Tests reveal that the act of handwriting — literally the feeling of touching a pen to paper — appears to imprint a “motor memory” in the sensorimotor region of the brain. In turn, this process promotes the visual recognition of letters and words, suggesting that the two seemingly separate acts of reading and writing are, in fact, linked.

In the study, participants were taught a new alphabet. Those who studied by writing out the letters by hand learned significantly more than those who studied only on a computer. Additionally, “brain scans revealed that while learning by handwriting prompted activity in a particular part of the brain known as Broca’s area, learning by keyboarding prompted little or no such activity.” Broca’s area is the portion of the brain most associated with speech production.

If you’re interested in more research-based study tips, check out these previous posts from our blog:

• Study skills are the Talk of the Nation
• Changing education paradigms
• Want to learn? Forget what you know!

Hat tip to Posit Science for the link to the Business Week article.

Blueberries on the brain

The January 2011 issue of Scientific American Mind picks up some research we have been following about flavonoids, which research shows may improve memory, learning and general cognitive function:

Emerging research suggests that compounds in blueberries known as flavonoids may improve memory, learning and general cognitive function, including reasoning skills, decision making, verbal comprehension and numerical ability. In addition, studies comparing dietary habits with cognitive function in adults hint that consuming flavonoids may help slow the decline in mental facility that is often seen with aging and might even provide protection against disorders such as Alzheimer’s and Parkinson’s.

We have previously posted about the impact of flavonoids (which also occur in chocolate) on math skills. In the article we cited, study authors indicated flavonoids worked by increasing blood flow to the brain. This more recent article indicates that researchers believe flavonoids impact cognition by interacting with proteins that are integral to brain-cell structure and function.

Either way, we like the idea of good-tasting foods being good for the brain!

Good kids who do dumb things with their friends

Parents of teenagers may frequently find themselves asking their children “What was going through your head?” New research from Temple University indicates that their friends may be to blame.

From the NY Times Well blog:

Teenage peer pressure has a distinct effect on brain signals involving risk and reward, helping to explain why young people are more likely to misbehave and take risks when their friends are watching.

In the study, teenagers and adults played a game with the goal of completing a driving mission in as little time as possible. In the game, participants had to make decisions such as whether to run a yellow light that could improve their time but also increased their chance of a crash. The participants each ran through the game alone and again after being told that two of their friends were watching them while they played. The results?:

Among adults and college students, there were no meaningful differences in risk taking, regardless of  whether friends were watching. But the young teenagers ran about 40 percent more yellow lights and had 60 percent more crashes when they knew their friends were watching. And notably, the regions of the brain associated with reward showed greater activity when they were playing in view of their friends. It was as if the presence of friends, even in the next room, prompted the brain’s reward system to drown out any warning signals about risk, tipping the balance toward the reward.

What’s a parent to do? Study co-author (and author of the book You and Your Adolescent: The Essential Guide for Ages 10-25) Laurence Steinberg, quoted in the Times article, says:

All of us who have very good kids know they’ve done really dumb things when they’ve been with their friends. The lesson is that if you have a kid whom you think of as very mature and able to exercise good judgment, based on your observations when he or she is alone or with you, that doesn’t necessarily generalize to how he or she will behave in a group of friends without adults around. Parents should be aware of that.

More research on the importance of auditory processing abilities for reading

We were interested to see new research from Belgium that looks at the link between early auditory processing abilities and later reading struggles. Published in January in Research in Developmental Disabilities, the longitudinal study showed that auditory processing and speech recognition struggles in kindergarten and first grade corresponded to dyslexia diagnoses in the third grade.

This new research is in line with previous studies that have determined that the auditory centers of the brain in dyslexic readers are under-activated compared to their typically developing peers (interestingly enough, the visual centers of the brain in dyslexic readers are hyper-activated).

Given the criticality of developing auditory processing abilities in young children, what’s a parent to do?

On her Parent Smart blog, Dr. Martha Burns has a couple suggestions:

• Bed time stories: “It doesn’t matter what the stories are. Many very young children love to hear the same storybook over and over, that is just fine.   Try to make a habit of 15 or more minutes a day of “quiet time” before bed in which your child selects a book and you read it together.” Dr. Burns includes age-specific suggestions for story time as well.
• Audio books: “Rather than bringing a DVD player along on a trip, try audio-books. The advantage of an audio book over a DVD is that it builds listening skills which are critical for doing well in school and allows your child to follow along with the written pages as they listen to the book, so it builds reading skills as well.”

An intervention like the Fast ForWord programs may be appropriate as well. A study of public school children with Auditory Processing Disorder showed improvement in phonemic decoding and sight word reading abilities after training with Fast ForWord. And the Stanford study referenced above showed normalization of activity in critical areas of the brain used for reading and significant improvements in reading and oral language skills on a number of assessments after Fast ForWord training.

How children’s brains acquire language

In adults, injury to the areas of the brain that are responsible for language skills (Broca’s and Wernicke’s areas) result in loss of language abilities. However, injuries to those same areas in early childhood don’t seem to impact language development in a negative way. As a result, researchers have long thought that a different area of the brain was active in language acquisition. But new research from UC San Diego, published in the Oxford University Press journal Cerebral Cortex says otherwise: “similar left frontotemporal areas are used for encoding lexico-semantic information throughout the life span, from the earliest stages of word learning.”

From a recent Science Daily article summarizing the research:

Combining the cutting-edge technologies of MRI and MEG, scientists at the University of California, San Diego show that babies just over a year old process words they hear with the same brain structures as adults, and in the same amount of time. Moreover, the researchers found that babies were not merely processing the words as sounds, but were capable of grasping their meaning.

Study co-author Kathleen Travis, quoted in the Science Daily article:

“Babies are using the same brain mechanisms as adults to access the meaning of words from what is thought to be a mental ‘database’ of meanings, a database which is continually being updated right into adulthood.”

And from co-author Eric Halgren, also in the article:

“Our study shows that the neural machinery used by adults to understand words is already functional when words are first being learned. This basic process seems to embody the process whereby words are understood, as well as the context for learning new words.”

Exercise as a Treatment for ADHD

Evidence abounds that physical exercise can enhance cognitive functioning. As we previously posted:

• A study at the University of Illinois compared performance on a cognitive test between higher and lower fit 9 and 10 year old students. The higher-fit students performed better on the test, and brain scans indicated they had larger basal ganglia, a part of the brain responsible for impulse control and response resolution.
• A second study by the same researchers compared performance on complex memory tasks between high fit and low fit 9 and 10 year olds. The study found better performance in high fit students, and brain scans showed larger hippocampi, the portion of the brain associated with complex memory tasks.

Over at SharpBrains, Dr. David Rabiner examines a study, recently published in the Journal of Attention Disorders, which looked at whether an extended physical training program can have a positive impact on students struggling with ADHD.

The data is generally positive, suggesting that a physical exercise routine can positively impact fitness, behavior (as observed by parents and teachers) and attention and inhibition response (as measured by neuropsychological assessments). However, as Dr. Rabiner points out:

It is important to put these positive findings into an appropriate perspective. First, even though the activity program was associated with improve ments in several areas, children continued to show clinically elevated difficulties even in areas where improvements were seen. Thus, there was no evidence that the exercise program reduced children’s difficulties into the normative range.

Dr. Rabiner suggests more research is necessary, but that this study suggests that “a vigorous physical activity program could certainly be valuable for many children with ADHD for a variety of reasons, even if the ultimate impact of exercise on core ADHD symptoms is not yet known.”