Can Brains Erase Memories?
New research indicates that fruit flies appear to have a brain mechanism that is "an active system to erase memory, completely independent from the mechanisms to form memories." This according to Yi Zhong, a neurogeneticist at Tsinghua University in Beijing and Cold Spring Harbor Laboratory in New York, speaking to LiveScience.
In the first set of experiments, the researchers left the flies alone after their training session was over, later testing them at specific points in time as their memory weakened. In a second experiment, the researchers disrupted the odor-shock memories by exposing flies to a new pair of odors. Finally, they reversed the flies' lesson, delivering the foot shock in conjunction with the opposite odor.
In all cases, the flies forgot what they learned previously, which the researchers suspect was due to a small protein known as Rac that switched on with the passage of time. This molecule switched on faster when the insects either got distracted by new experiences or confused by conflicting information.
When Rac was blocked, flies held on to newly acquired memories for longer than they otherwise would have, extending their life from a few hours to more than a day. When the researchers artificially increased Rac in fly neurons, new memories were erased more rapidly.
Science fiction fans remember more about forgetting than scientists have discovered so far. In his 1966 story We Can Remember It For You Wholesale Philip K. Dick writes about erased memories. The story was the basis for the film Total Recall.
Not long thereafter, Mr. Spock demonstrated that Vulcans had mastered the art of forgetting in a classic Star Trek episode Requiem for Methuselah.
("Forget" stated forcefully during Vulcan mind-meld)
In the 2004 film Eternal Sunshine of the Spotless Mind, Kate Winslet and Jim Carrey play lovers who have a falling out. Winslet's character goes to a company called Lacuna, Inc. to have her memories of the relationship removed.
(Jim Carrey gets spotless)
Zhong's research was published last week in Cell; his longterm goal is to help people with problems like post-traumatic stress disorder.
Scroll down for more stories in the same category. (Story submitted 2/21/2010)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
PEDOT Polymer Could Enhance Brain-Machine Interfaces
'the hair-fine wire going deep into Owen's brain, down into the pleasure center.' - Larry Niven, 1969.
BioVYZR Is Ready, Anti-Covid19 PAPR Lovers
'Some clad in the insulated space-suits, with their transparent glassite helmets.' - Edmond Hamilton, 1931.
Healight Ultraviolet Endotracheal Device Has Covid-19 Treatment Potential
'He applied the tip of the instrument to the interior of the wound...' - Cogswell, 1976.
Beat Covid-19 With AIR By MicroClimate - At Last I Get My PAPR
More than just a bubble.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
DALL-E Makes Creative Images From Text
Okay, sf fans. If you could have some art created from a science fiction sentence, what sentence would you pick?
BladeBUG Robots Clean Massive Wind Turbine Blades
'There were the cleaners, with large padded feet, who were apparently polishing their way the whole length...'
Looms To Manually Weave Lunar Rover Wheels
It's fascinating to me how the Apollo program forced people to think outside their usual boxes.
IceBot Antarctic (Planetary?) Robotic Explorers Made Of Ice
'Some will combine in place to form more complicated structures, like excavators or centipedes.'
Glad 2020 Is Over
Maybe you missed one of these?
PEDOT Polymer Could Enhance Brain-Machine Interfaces
'the hair-fine wire going deep into Owen's brain, down into the pleasure center.'
Study: Robots Encourage Humans To Take Risks
Not exactly Three Laws compliant.
Kinetic Buildings And Psychotropic Houses
'There was a dim whirring, and the spheres tipped and began to rotate...'
Jupe Urban Escape Pods Have Tesla, SpaceX Roots
'The houses are prefabricated units... and they sell at the flat rate of five hundred dollars a room — set up.'
Best Robot Dance Video Of 2020
'I can Mashed Potato... I can do the Twist.'
Vertical Farm In Singapore's Output Is 1.5 Tons Per Day
'A towering eighty-story structure like the office "In-and-Out" baskets stacked up to the sky.'
3D Printed 'Blisk' Manufactured In Orbit
'It can be mass-produced only in the orbiting factories...'
Comercial Airlock 'Bishop' Now On ISS
'They put the bones and the glass can that had contained the soup into the double-doored partition or vestibule...'
Space Station Could Use Some Martian Sawgrass
'What better purifying machine is there than a plot of grass?'
ARTUu AI Copilot For USAF
'A series of short beep's and chirps issued from his speaker...'
Smellicopter Combines Live Moth Antenna With Mechanical Drone
'The organic tissue is inserted in the master tank and then sealed.'
More SF in the News Stories
More Beyond Technovelgy science news stories