JOE BRUCHIS wrote to ALL <=-
Erasing the Pain of the Past
Scientists Are Developing Drugs That Could Eliminate Traumatic Events
From Our Memories
ABC News | March 20, 2007
RUSSELL GOLDMAN
March 20, 2007 - - "I'd take it in a second," said Sgt. Michael
Walcott, an Iraq War veteran, referring to an experimental drug with
the potential to target and erase traumatic memories.
Walcott, who served in a Balad-based transportation unit that regularly took mortar fire, now suffers from post-traumatic stress disorder.
Since returning to the United States two years ago, he has been on antidepressants and in group therapy as he tries to put his life back together and heal from the psychological scars of war. "There are moments," he said, "when you just want be alone and don't want to deal with everyone telling you that you've changed."
There are many others like Walcott. The Army estimates that one in
eight soldiers returning home from Iraq suffers from post-traumatic
stress disorder. Symptoms of the disorder, once known as shell shock, include flashbacks, nightmares, feelings of detachment, irritability, trouble concentrating and sleeplessness.
Much about why painful memories come back to haunt soldiers and those
who live through other traumatic experiences remains unknown.
Scientists say that is because little is known about how the brain
stores and recalls memories.
But in their early efforts to understand the way in which short-term memories become long-term memories, researchers have discovered that certain drugs can interrupt that process. Those same drugs, they
believe, can also be applied not just in the immediate aftermath of a traumatic event - like a mortar attack, rape or car accident - but
years later, when an individual is still haunted by memories of event.
The hope is that a post-traumatic stress disorder patient can work with
a psychiatrist and focus a traumatic event, take one of these drugs and then slowly forget that event. With that hope, however, comes a series
of ethical concerns. What makes up our personalities - the essence of
who we are as individuals - if not the collected memories of our experiences?
"This is all very preliminary," said Dr. Roger Pitman, a Harvard
Medical School psychiatrist. "We're just getting started. There is some promising preliminary data but no conclusions."
Much of the research Pitman is currently conducting on human subjects
at Massachusetts General Hospital focuses on altering memories in the immediate aftermath of a specific type of trauma - automobile
accidents. Subjects who arrive in the hospital's emergency room are prescribed either the drug propranolol or a placebo.
Propranolol was originally developed to treat high blood pressure, but
its effect on the hormone adrenaline has made it popular among actors dealing with severe stage fright, and scientists are now using it in
their research on memory.
"There is a period of time after you first learn something before it's retained," Pitman explained. "This is called consolidation."
Some research has shown that stress hormones, particularly adrenaline, make that process faster and more intense.
"That's why you remember what you were doing the morning of Sept. 11, better than August 11," he said.
Some scientists believe that post-traumatic stress disorder is the
result of too much adrenaline entering the brain at the moment the
memory of a traumatic event is being consolidated, or stored, for the first time.
But "the real hot topic," Pitman said, is not consolidation but reconsolidation, the process by which an old memory is recalled and the same "window of opportunity" to alter it with drugs is opened for a
second time.
By getting soldiers, or others who have lived through harrowing experiences, to remember their traumatic experiences through talking therapy, the theory goes, the chance to target and erase those memories presents itself.
Reconsolidation remains a "controversial" theory according to Pitman,
but Joseph LeDoux, a psychologist at New York University's Center for Neural Science, said his recent experiments with rats adds to evidence that it's real.
LeDoux is not trying to create a drug to treat humans. For him, the specific drug isn't important. What is important is understanding the process by which memories are retained and altered.
"The idea is that memories are vulnerable. They can be improved or weakened. The main point is that we're trying to understand how this
all works rather than come up with a drug."
An Ethical Firestorm -- 'A Genie in the Bottle'
But the idea of improving or weakening people's memories gives many medical ethicists pause. The President's Council on Bioethics has condemned memory-altering research. The National Institutes of Health, however, has funded some experiments that use propranalol for post-traumatic stress disorder treatment, and Pitman said he has
received a grant from the Army to begin conducting similar research
with Iraq veterans.
"There are several major concerns" about creating these kinds of drugs, said Felicia Cohn, a medical ethicist at University of California at Irvine's School of Medicine. "Is the act of altering memories even an appropriate medical intervention?" she asked.
Another set of "issues is related to consequences. What are the effects
of altering a particular person's memory but not changing the context
the person is living in. We might erase a young girl's memory of a
rape, but people around her will still know and inadvertently remind
her," Cohn said.
"It becomes a genie in the bottle question. Once a drug is available
for use, it gets used appropriately and inappropriately. People could start going to physicians to forget they love chocolate. . Is it just
for post-traumatic stress disorder and rape victims? Where do we draw
the line? Who gets to decide what is horrific enough?"
=== Cut ===
Joe
--- GoldED+/W32-MINGW 1.1.5-b20061116
* Origin: -= Fire on the Bayou =- (1:3828/12)
Hi Joe, whatcha know?
Hang onto that Au
We're in for a rollercoaster of an economy you know.
The DOD jumped right on this stuff you know.
JOE BRUCHIS wrote to WAYNE CHIRNSIDE <=-
Hello WAYNE.
22 Mar 07 04:31, you wrote to me:
Hi Joe, whatcha know?
Hang onto that Au
We're in for a rollercoaster of an economy you know.
The DOD jumped right on this stuff you know.
Yeah, it's pretty much a given that the stock market is mostly insider trading causing the volumes to stay high. Also credit card debt is the highest ever, and real estate, although recovering is expected to fall again.
The only problem is, after completion of the North American Union, the Amero which will replace the dollar will keep gold from hitting $1000
per ounce as it did in te year 2000. It should get higher than it is
now. So far, I've averaged 18% increase in value per year on my Au.
Shoot, how'd you get to be so smart?
Didn't I myself earlier tell you the Au was a good idea?
I know I did.
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