By now, everyone’s aware that Ben Carson likened slaves to immigrants during a staff speech Monday to mark his first full week as secretary of housing and urban development. The comparison did not play nicely on social media. (On Twitter, actor Samuel L. Jackson announced his disapproval with a phrase that cannot be reprinted here.)
But Carson’s remarks about slavery were not his only statements to receive scrutiny.
As a surgeon at Johns Hopkins Hospital in 1987, Carson famously separated infant twins conjoined at the head. But 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.”
He went on: “It can process more than 2 million bits of information per second. You can’t overload it. Have you ever heard people say, ‘Don’t do all that, you’ll overload your brain.’ You can’t overload the human brain. If you learned one new fact every second, it would take you more than 3 million years to challenge the capacity of your brain.”
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 memorised 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.
Exactly where the brain holds memories is a question with century-old roots, and it is likely a function of the memory’s age. The hippocampus is thought to play a part in long-term recall, but does not itself store old memories. And though recent studies indicate that electrically stimulating the hippocampus can boost performance on memory tests, this was not the same as triggering decades-old recollections.
(A technique called optogenetics has allowed scientists to implant false memories by shining light into altered brain cells via fibre optic cable. The same technique can restore memories in mice suffering from a chemically induced approximation of amnesia. But the amnesiac brains on the receiving end of the fiber optic cable must belong to mice. And none of their lost mouse memories were ancient, or so detailed as a novel.)
This was not the first time Carson has made similar claims. The brain-as-perfect-recall-device also appeared during a speech Carson gave in 2011, at conference called the Celebration of Creation held by the Adventist News Network. In his book One Nation, Carson repeated the idea that he could stimulate an 85-year-old man into reciting an entire book that the man read in his 20s.
The controversial orders Donald Trump has already issued
The controversial orders Donald Trump has already issued
1/9 Trump and the media
White House Press Secretary Sean Spicer takes questions during the daily press briefing
2/9 Trump and the Trans-Pacific Partnership
Union leaders applaud US President Donald Trump for signing an executive order withdrawing the US from the Trans-Pacific Partnership negotiations during a meeting in the Roosevelt Room of the White House in Washington DC. Mr Trump issued a presidential memorandum in January announcing that the US would withdraw from the trade deal
3/9 Trump and the Mexico wall
A US Border Patrol vehicle sits waiting for illegal immigrants at a fence opening near the US-Mexico border near McAllen, Texas. The number of incoming immigrants has surged ahead of the upcoming Presidential inauguration of Donald Trump, who has pledged to build a wall along the US-Mexico border. A signature campaign promise, Mr Trump outlined his intention to build a border wall on the US-Mexico border days after taking office
4/9 Trump and abortion
US President Donald Trump signs an executive order as Chief of Staff Reince Priebus looks on in the Oval Office of the White House. Mr Trump reinstated a ban on American financial aide being granted to non-governmental organizations that provide abortion counseling, provide abortion referrals, or advocate for abortion access outside of the United States
5/9 Trump and the Dakota Access pipeline
Opponents of the Keystone XL and Dakota Access pipelines hold a rally as they protest US President Donald Trump's executive orders advancing their construction, at Columbus Circle in New York. US President Donald Trump signed executive orders reviving the construction of two controversial oil pipelines, but said the projects would be subject to renegotiation
6/9 Trump and 'Obamacare'
Nancy Pelosi who is the minority leader of the House of Representatives speaks beside House Democrats at an event to protect the Affordable Care Act in Los Angeles, California. US President Donald Trump's effort to make good on his campaign promise to repeal and replace the healthcare law failed when Republicans failed to get enough votes. Mr Trump has promised to revisit the matter
7/9 Donald Trump and 'sanctuary cities'
US President Donald Trump signed an executive order in January threatening to pull funding for so-called "sanctuary cities" if they do not comply with federal immigration law
8/9 Trump and the travel ban
US President Donald Trump has attempted twice to restrict travel into the United States from several predominantly Muslim countries. The first attempt, in February, was met with swift opposition from protesters who flocked to airports around the country. That travel ban was later blocked by the Ninth Circuit Court of Appeals. The second ban was blocked by a federal judge a day before it was scheduled to be implemented in mid-March
SANDY HUFFAKER/AFP/Getty Images
9/9 Trump and climate change
US President Donald Trump sought to dismantle several of his predecessor's actions on climate change in March. His order instructed the Environmental Protection Agency to reevaluate the Clean Power Plan, which would cap power plant emissions
Carson’s public opinions have not always aligned with his famous credentials in medicine. He has been criticised in the past for raising doubts about vaccine safety. He called climate change “irrelevant” in a November 2014 interview.
And Carson once proposed that the Old Testament prophet Joseph built the Great Pyramids of Giza to store grain, as The Washington Post reported in 2015, based on the doctor’s interpretation of the Book of Genesis when, in fact, the ancient Egyptians constructed the pyramids, which are not hollow, for pharaohs to use as royal tombs.
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