Experience in the early development of new neurons in specific brain regions affects their survival and activity in the adult brain, new research shows. How these new neurons store information about these experiences may explain how they can affect learning and memory in adults.
A team of researchers headed by Fred Gage, PhD, of the Salk Institute, found that experience enhances the survival of new neurons in a brain area called the dentate gyrus, and that more of these new neurons were activated when exposed to the same experience later. This change in function may be a mechanism for long-term memory. The findings are published in the March 21 issue of The Journal of Neuroscience.
"The results identify a critical period for experience-induced enhancement of new neuron survival in the hippocampus," says Elizabeth Gould, PhD, of Princeton University, who was not affiliated with the study. The hippocampus contains the dentate gyrus.
Health & Wellness
We've all had our moments of weakness when trying to control ourselves; eating that donut on your diet, losing your temper with your kids, becoming upset when you're doing your best not to. It isn't like we plan on these lapses in judgment. It's more like they just sort of happen.
There is scientific evidence that explains this phenomenon of everyday life. Self regulation, our strength to inhibit impulses, make decisions, persist at difficult tasks, and control emotions can be spent just like a muscle that has been lifting heavy weights. When we spend our strength on one task (trying to control your emotion around a petulant boss), there is less to spend on others (avoiding the Ben & Jerry's when we get home).
There is scientific evidence that explains this phenomenon of everyday life. Self regulation, our strength to inhibit impulses, make decisions, persist at difficult tasks, and control emotions can be spent just like a muscle that has been lifting heavy weights. When we spend our strength on one task (trying to control your emotion around a petulant boss), there is less to spend on others (avoiding the Ben & Jerry's when we get home).
With calls of emotional blackmail from opponents, a measure requiring women seeking abortions to first review ultrasound images of their fetuses advanced Wednesday in the South Carolina Legislature.
The legislation, supported by Republican Gov. Mark Sanford, passed 91-23 after lawmakers defeated amendments exempting rape or incest. The House must approve the bill again in a routine vote before it goes to the Senate, where its sponsor expects it to pass with those exemptions.
Some states make ultrasound images available to women before an abortion, but South Carolina would be alone in requiring women to view the pictures.
The legislation, supported by Republican Gov. Mark Sanford, passed 91-23 after lawmakers defeated amendments exempting rape or incest. The House must approve the bill again in a routine vote before it goes to the Senate, where its sponsor expects it to pass with those exemptions.
Some states make ultrasound images available to women before an abortion, but South Carolina would be alone in requiring women to view the pictures.
In his 1983 fake documentary 'Zelig', Woody Alan plays a character, Leonard Zelig, a kind of human chameleon who takes on the appearance and behaviour of whoever he is with. Now psychologists in Italy have reported the real-life case of AD, a 65-year-old whose identity appears dependent on the environment he is in. He started behaving this way after cardiac arrest caused damage to the fronto-temporal region of his brain.
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| ©The Star |
| Dr. Cynthia Maxwell holds Graham Berry's umbilical cord moments after his delivery at Mount Sinai Hospital in Toronto last month. |
Japanese doctors were warned on Wednesday against prescribing Tamiflu to teenagers after several young patients taking the bird flu-fighting drug reportedly exhibited dangerous behavior.
The Health Ministry issued emergency instructions Tuesday to a Japanese Tamiflu distributor, Chugai Pharmaceutical Co., to warn doctors not to give the drug to teenagers, a Chugai official said on condition of anonymity, citing protocol.
Chugai began distributing warnings to doctors, hospitals and pharmacies across Japan on Wednesday, the official said.
The Health Ministry issued emergency instructions Tuesday to a Japanese Tamiflu distributor, Chugai Pharmaceutical Co., to warn doctors not to give the drug to teenagers, a Chugai official said on condition of anonymity, citing protocol.
Chugai began distributing warnings to doctors, hospitals and pharmacies across Japan on Wednesday, the official said.
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| ©Telegraph |
| Poisonous: 'It is like a perversion of the evolution theory: they have evolved into creatures whose function is simply to get the most for doing the least,' says one husband |
Pharmaceutical companies fail to publicly reveal all of the money and gifts they give to physicians and health care workers - making it hard to know what the money is for.
A new analysis found that records were sketchy and hard to access in two states that require drug companies to publicly disclose payments made to physicians.
Five states and the District of Columbia have enacted so-called sunshine laws that require companies to report how much money they pay doctors and other health care workers as well as in what form and for what purpose. Such payments can range from consulting fees for clinical trials to meals to "detailing" (paying doctors to let drug-marketing reps talk up their drugs during the workday), some of which can raise concerns about conflicts of interest when doctors are prescribing the companies' drugs to patients.
A new analysis found that records were sketchy and hard to access in two states that require drug companies to publicly disclose payments made to physicians.
Five states and the District of Columbia have enacted so-called sunshine laws that require companies to report how much money they pay doctors and other health care workers as well as in what form and for what purpose. Such payments can range from consulting fees for clinical trials to meals to "detailing" (paying doctors to let drug-marketing reps talk up their drugs during the workday), some of which can raise concerns about conflicts of interest when doctors are prescribing the companies' drugs to patients.
U.S. scientists are testing drugs that could help soldiers erase the memory of traumatic events.
The U.S. Army estimates that one in eight soldiers returning home from Iraq suffers from post-traumatic stress disorder, ABC News said.
Researchers working on drugs that can target and erase traumatic events from a person's memory say the drugs might work in cases where the event occurred many years ago.
The U.S. Army estimates that one in eight soldiers returning home from Iraq suffers from post-traumatic stress disorder, ABC News said.
Researchers working on drugs that can target and erase traumatic events from a person's memory say the drugs might work in cases where the event occurred many years ago.
Physicists in Canada have used a conventional magnetic resonance imaging (MRI) system to control the movement of a small metal bead inside blood vessels. The experiment demonstrates that MRI systems could eventually control tiny "untethered" devices that perform truly non-invasive surgery.
In the 1966 movie Fantastic Voyage, scientists climb into a submarine, shrink themselves down to the size of a red blood cell and are then injected into a dying man to break a blood clot. 40 years on, and the art of shrinking is still far away in the realms of science fiction - but the remote control of miniature devices to perform surgery in the bloodstream may not be.
In the 1966 movie Fantastic Voyage, scientists climb into a submarine, shrink themselves down to the size of a red blood cell and are then injected into a dying man to break a blood clot. 40 years on, and the art of shrinking is still far away in the realms of science fiction - but the remote control of miniature devices to perform surgery in the bloodstream may not be.
Comment: Strange... it sounds a lot like psychopathy.