Tag Archives: Memory

In honor of Pi Day

14 Mar

By the way, I am much more impressed by someone who recites pi with eyes closed than by someone wearing a blindfold, since blindfolds can be easily gimmacked.

Ben Carson on memory

10 Mar

By all accounts Housing and Urban Development Secretary Ben Carson is a talented neurosurgeon. But he seems to be surprisingly ill informed about modern memory science:

…on Monday, he told a factually wrong parable about the brain. Specifically, Carson said, the brain was incapable of forgetting and could be electrically stimulated into perfect recall — a statement that, even though made by one of the most famous former neurosurgeons alive, was far more fiction than science.

It came in an anecdote meant to motivate the federal employees, a bit Carson developed on the public speaking circuit. He described the brain’s surprising power as a way to show the audience that they were more capable than they believed.

Except his description did not hit the mark. “It remembers everything you’ve ever seen. Everything you’ve ever heard. I could take the oldest person here, make a little hole right here on the side of the head,” Carson said, circling his left temple with a finger, “and put some depth electrodes into their hippocampus and stimulate. And they would be able to recite back to you, verbatim, a book they read 60 years ago. It’s all there. It doesn’t go away. You just have to learn how to recall it.”

Here’s the story in the Washington Post.

The insinuation that Carson could zap a patient into reciting, from cover to cover, a book read in 1957 was not true, experts said.

“Using electrodes placed in the human brain to implant memories or to recall forgotten memories is simply not possible at this time,” Darin Dougherty, a psychiatrist and the director of Massachusetts General Hospital’s neurotherapeutics division, told Gizmodo.

Dan Simons, a University of Illinois psychologist who studies attention and memory, told Wired that Carson’s claim was “utter nonsense.” Simons said it failed on nearly all counts: Humans cannot recall large swaths of text unless memorized for that purpose. Doctors cannot force patients to remember anything in crystal detail, even with deep brain stimulation. No human brain holds within it “a perfect and permanent record of our experiences,” the psychologist said.

Using a memory palace to learn a chapter of Moby Dick

22 Feb

A good example of how to use a memory palace:

Can plants learn?

9 Dec

In his famous book, The Origin of Consciousness in the Breakdown of the Bicameral Mind, Julian Jaynes mentions his experiments on learning in mimosa plants. I found this fascinating and always wish he had provided more detail. Now a paper published in Nature points to evidence that plants are capable of associative learning. From the abstract:

Here we show that this type of learning occurs in the garden pea, Pisum sativum. By using a Y-maze task, we show that the position of a neutral cue, predicting the location of a light source, affected the direction of plant growth. This learned behaviour prevailed over innate phototropism. Notably, learning was successful only when it occurred during the subjective day, suggesting that behavioural performance is regulated by metabolic demands. Our results show that associative learning is an essential component of plant behaviour. We conclude that associative learning represents a universal adaptive mechanism shared by both animals and plants.

A review of my memory improvement book!

16 Aug

I just came across this review of my book. Many thanks to The Art of Memory.

There is also a lengthy summary in the comments.

Dewey Decimal System Mnemonic

1 Aug

Here is a first letter mnemonic for the potentially useful task of learning the Dewey Decimal System:

Generally, philosophical religionists see language scientifically to favor literary history.

Category Catalog Number Mnemonic
General Works 0 Generally
Philosophy and psychology 100 philosophical
religion 200 religionists
Social Science 300 see
Language 400 language
Science 500 scientifically
Technology 600 to
Fine arts 700 favor
Literature 800 literary
History 900 history

Adapted from Evans (2007)

Can methylene blue improve memory?

1 Jul

Methylene blue is a chemical that has been used an antidote for cyanide poisoning. There have been suggestions over the years that it may have an effect on  memory. A paper titled “Multimodal Randomized Functional MR Imaging of the Effects of Methylene Blue in the Human Brain,” was recently published in the journal Radiology. Unfortunately, I have not been able to locate a copy of the original paper, so I am forced to rely on this account in ScienceDaily:

“A single oral dose of methylene blue results in an increased MRI-based response in brain areas that control short-term memory and attention, according to a new study. Methylene blue was associated with a 7 percent increase in correct responses during memory retrieval.”

Several media outlets report that methylene blue was shown to improve short term memory. This is one of the reasons I need to see the original paper. The phrase “short term memory” is used differently by psychologists than the general public. Indeed, many psychologists have abandoned the phrase altogether and, instead, talk about working-memory. When non-academics talk about short term memory they mean things like forgetting a phone number or someone’s name. In fact, most of these are failures of attention or long term memory, not problems with short term memory. Thus, I worry that reporting on this research may be very misleading.

%d bloggers like this: