Archive for February, 2011
More Research to Share #2
This post is a continuation of articles taken from Discover Magazine, Fall, 2010 issue on The Brain.
From the lead article:
Inside Man by David Ewing Duncan, pp 5-11
“With the power of neuroimaging, Discover reporter David Ewing Duncan takes a magical mystery tour of his own mind, exploring fear, memory, and faith.”
MJT: I’ve been following the work of Dr. Adam Gazzaley, director of The Brain Lab at University of California at San Francisco, and have cited his work in previous posts. In this article, the author goes to the UCSF lab to test his ability to remember.
“Through his research, Gazzaley has set out to prove that the brain does not lose its ability to remember as it ages but rather loses its ability to filter out unwanted memories; in a sense it remembers too much. He is demonstrating that the frontal lobe—the rational and decision-making part of the brain—has a major influence on what is retained by the hippocampus and the brain’s other emotional centers. Neuroscientists call this function top-down modulation, a process by which the frontal lobe guides both what people recall and what they do not want or need to burn into their memory cells. The brain does the same thing with hearing. Young ears (and brains) can easily discern the voice of a friend sitting across a table in a noisy bar; as ears and brains age, they are less able to pick out the friend’s voice from the barrage of others sounds. ‘We think it’s a filtering problem,’ Gazzaley says.”
MJT: Because aging brains do not always filter out what it was supposed to ignore, we must really focus our listening to absorb what is crucial. If you sense you’re not filtering well, learn and use techniques to keep yourself attuned.
Article:
The Internet Makes Deep Thought Difficult, if Not Impossible by Nichols Carr, pp. 13-15
MJT: I love the following analogy the author makes.
“Imagine filling a bathtub with a thimble; that’s the challenge involved in transferring information from working memory into longer term memory. By regulating the velocity and intensity of information flow, media exert a strong influence on this process. When we read a book, the information faucet provides a steady drip, which we can control by the pace of our reading. Through our single-minded concentration on the text, we can transfer all or most of the information, thimbleful by thimbleful, into long-term memory and forge the rich associations essential to the creation of schemas. With the Net, we face many information faucets, all going full blast. Our little thimble overflows as we rush from one faucet to the next. We’re able to transfer only a small portion of the information to long-term memory, and what we do transfer is a jumble of drops from different faucets, not a continuous, coherent stream from one source.”
“…improving our ability to multitask actually hampers our ability to think deeply and creatively….The more you multitask, the less deliberative you become; the less able to think and reason out a problem.” Quoted from Jordan Grafman, head of the cognitive neuroscience unit at the National Institute of Neurological Disorders and Stroke.
“The Roman philosopher Seneca may have put it best two thousand years ago: ’To be everywhere is to be nowhere.’”