Tuesday 24 April 2012

Opiates Killed 8 Americans In Afghanistan, Army Records Show

Eight American soldiers died of overdoses involving heroin, morphine or other opiates during deployments in Afghanistan in 2010 and 2011, according to U.S. Army investigative reports. The overdoses were revealed in documents detailing how the Army investigated a total of 56 soldiers, including the eight who fell victim to overdoses, on suspicion of possessing, using or distributing heroin and other opiates. At the same time, heroin use apparently is on the rise in the Army overall, as military statistics show that the number of soldiers testing positive for heroin has grown from 10 instances in fiscal year 2002 to 116 in fiscal year 2010. Army officials didn't respond to repeated requests for comment on Saturday. But records from the service's Criminal Investigation Command, obtained by the conservative legal group Judicial Watch, provided glimpses into how soldiers bought drugs from Afghan juveniles, an Afghan interpreter and in one case, an employee of a Defense Department contractor, who was eventually fired. The drug use is occurring in a country that is estimated to supply more than 90% of the world's opium, and the Taliban insurgency is believed to be stockpiling the drug to finance their activities, according to a 2009 U.N. study. While the records show some soldiers using heroin, much of the opiate abuse by U.S. soldiers in Afghanistan involves prescription drugs such Percocet, the Army documents show. Judicial Watch obtained the documents under the Freedom of Information of Act and provided them to CNN. Spokesman Col. Gary Kolb of the International Security Assistance Force, the NATO-led command in Afghanistan, verified the documents to CNN on Saturday. One fatal overdose occurred in June 2010 at Forward Operating Base Blessing, after a soldier asked another soldier to buy black tar opium from a local Afghan outside the base's entry control point. The first soldier died after consuming the opium like chewing tobacco and smoking pieces of it in a cigarette, the documents show. The reports even show soldier lingo for the drug -- calling it "Afghani dip" in one case where three soldiers were accused of using the opiate, the Army investigative reports show. The United States has 89,000 troops in Afghanistan. The U.S. death toll since the September 11, 2001, attacks that triggered the war has risen to more than 1,850, including 82 this year, according to the U.S. Department of Defense and U.S. Central Command. Tom Fitton, president of Judicial Watch, said his group was interested in soldiers' drug use partly because the risk was present during the Vietnam War. "You never want to see news of soldiers dying of drug use in Afghanistan," Fitton said. "Our concern is, will the military treat this as the problem that it is, and are the families of the soldiers aware of the added risk in this drug-infested country? "There is a dotted line between the uses. Prescription abuse can easily veer into heroin drug use," Fitton added. "Afghanistan is the capital of this opiate production and the temptation is great there and the opportunity for drug use all the more." The group is concerned that "there hasn't been enough public discussion, and we would encourage the leadership to discuss or talk about this issue more openly," Fitton said. In one case, a soldier bought heroin and the anti-anxiety drug Xanax from five "local national juveniles at multiple locations on Camp Phoenix, Afghanistan, and consumed them," one report states. Soldiers also distributed heroin, Percocet and other drugs among themselves, according to the reports. Another soldier fatally overdosed in December 2010 after taking several drugs, including morphine and codeine, though the drugs were not prescribed for him, the Army documents show. One female soldier broke into the Brigade Medical Supply Office at Forward Operating Base Shank and stole expired prescription narcotics including morphine, Percocet, Valium, fentanyl and lorazepam, the documents show. The investigative reports show soldiers using other drugs, including steroids and marijuana, and even hashish that was sold to U.S. servicemen by the Afghan National Army and Afghan National Police personnel, the reports state.

Saturday 21 April 2012

What cannabis actually does to your brain

Archaeologists recently found a 2,700-year-old pot stash, so we know humans have been smoking weed for thousands of years. But it was only about 20 years ago that neuroscientists began to understand how it affects our brains.

Scientists have known for a while that the active ingredient in cannabis was a chemical called delta-9-tetrahydrocannabinol, or THC for short. Ingesting or smoking THC has a wide range of effects, from the psychoactive "getting high" to the physiological relief of pain and swelling. It also acts as both a stimulant and depressant. How could one substance do all that?

What cannabis actually does to your brainMeet the cannabinoid receptor

In the 1980s and 90s, researchers identified cannabinoid receptors, long, ropy proteins that weave themselves into the surfaces of our cells and process THC. They also process other chemicals, many of them naturally occurring in our bodies. Once we'd discovered these receptors, we knew exactly where THC was being processed in our bodies and brains, as well as what physical systems it was affecting. Scattered throughout the body, cannabinoid receptors come in two varieties, called CB1 and CB2 - most of your CB1 receptors are in your brain, and are responsible for that "high" feeling when you smoke pot. CB2 receptors, often associated with the immune system, are found all over the body. THC interacts with both, which is why the drug gives you the giggles and also (when interacting with the immune system) reduces swelling and pain.

 

Cannabinoid receptors evolved in sea squirts about 500 million years ago; humans and many other creatures inherited ours from a distant ancestor we share with these simple sea creatures. THC binds to receptors in animals as well as humans, with similar effects.

Tasty, tasty, tasty

Cannabis notoriously makes people hungry - even cancer patients who had lost all desire to eat.One study showed that cancer patients who thought food smelled and tasted awful suddenly regained an ability to appreciate food odors after ingesting a THC compound. There are CB1 receptors in your hypothalamus, a part of your brain known to regulate appetite, and your body's own cannabinoids usually send the "I'm hungry" message to them. But when you ingest THC, you artificially boost the amount of cannabinoids sending that message to your hypothalamus, which is why you get the munchies.

Understanding this process has actually led to a new body of research into safe diet drugs that would block those cannabinoid receptors. That way, your hypothalamus wouldn't receive signals from your body telling it to eat, and would reduce hunger cravings in dieters.

What you're forgetting

What's happening in your brain when smoking pot makes you forget what you're saying in the middle of saying it? According to the book Marijuana and Medicine (National Academies Press):

One of the primary effects of marijuana in humans is disruption of short-term memory. That is consistent with the abundance of CB1 receptors in the hippocampus, the brain region most closely associated with memory. The effects of THC resemble a temporary hippocampal lesion.

That's right - smoking a joint creates the effect of temporary brain damage.

What happens is that THC shuts down a lot of the normal neuroprocessing that goes on in your hippocampus, slowing down the memory process. So memories while stoned are often jumpy, as if parts are missing. That's because parts literally are missing: Basically you are saving a lot less information to your memory. It's not that you've quickly forgotten what's happened. You never remembered it at all.

What cannabis actually does to your brainA bit of the old timey wimey

Cannabis also distorts your sense of time. THC affects your brain's dopamine system, creating a stimulant effect. People who are stoned often report feeling excited, anxious, or energetic as a result. Like other stimulants, this affects people's sense of time. Things seem to pass quickly because the brain's clock is sped up. At the same time, as we discussed earlier (if you can remember), the drug slows down your ability to remember things. That's because it interferes with the brain's acetylcholine system, which is part of what helps you store those memories in your hippocampus. You can see that system's pathway through the brain in red in the illustration at left.

In an article io9 published last year about the neuroscience of time, we noted:

The interesting thing about smoking pot is that marijuana is one of those rare drugs that seems to interact with both the dopamine and the acetylcholine system, speeding up the former and slowing down the latter. That's why when you get stoned, your heart races but your memory sucks.

It's almost as if time is speeding up and slowing down at the same time.

Addiction and medicine

Some experts call cannabis a public health menace that's addictive and destroys lives by robbing people of ambition. Other experts call it a cure for everything from insomnia to glaucoma, and advocate its use as a medicine. The former want it to be illegal; the latter want it prescribed by doctors. Still other groups think it should be treated like other intoxicants such as alcohol and coffee - bad if you become dependent on it, but useful and just plain fun in other situations.

What's the truth? Scientists have proven that cannabis does have medical usefulness, and the more we learn the more intriguing these discoveries become. Since the early 1980s, medical researchers have published about how cannabis relieves pressure in the eye, thus easing the symptoms of glaucoma, a disease that causes blindness. THC is also "neuroprotective," meaning in essence that it prevents brain damage. Some studies have suggested that cannabis could mitigate the effects of Alzheimer's for this reason.

At the same time, we know that THC interferes with memory, and it's still uncertain what kinds of long-term effects the drug could have on memory functioning. No one has been able to prove definitively that it does or does not erode memory strength over time. Obviously, smoking it could cause lung damage. And, like the legal intoxicant alcohol, cannabis can become addictive.

Should cannabis be illegal, while alcohol flows? Unfortunately that's not the kind of question that science can answer. Let's leave the moral questions to courts, policymakers and shamans. I'll be off to the side, smoking a joint, thinking about my acetylcholine system and the many uses of the hippocampus.

Wednesday 4 April 2012

Easter airport 'gridlock' warning

 

Airlines have warned the Home Secretary that Britain "risks gridlock" at airports including Heathrow and Gatwick over the Easter break due to staff shortages. More than 370,000 passengers will leave Heathrow airport between Good Friday and Easter Monday, and 200,000 will pass through Gatwick. A spokesman for Heathrow owner BAA told the Daily Telegraph: "Immigration waiting times during peak periods at Heathrow are currently unacceptable and we have called on the UK Border Force to address the problem as a matter of urgency. "There isn't a trade-off between strong border security and a good passenger experience. UK Border Force should be delivering both." Meanwhile, Britons attempting to travel by rail and road face delays because of engineering works taking place on motorways and train lines. Stretches of the M1 and M25 will be affected, and the seven million passengers travelling by train over the weekend will see disruption to travel to and from Euston, King's Cross, Liverpool Street, and Waterloo stations in London. British Airways and Virgin Airlines are among 11 firms that have written to Theresa May in anticipation of "unacceptable" delays to hundreds of thousands of passengers travelling over the long weekend. The UK Border Agency is under fire for a lack of staff able to carry out full security checks, which the airlines say must result in a recruitment drive or the relaxing of some of the more stringent measures currently in place. A spokeswoman for Virgin Airlines said: "While the decision on what level of check should be made at the border is, of course, a matter for Government, we are concerned that there is currently a mismatch between policy and resource. "After years of reducing frontline staff, returning to a 100% check system will undoubtedly mean lengthy queues at UK airports over critical holiday periods such as Easter and the Diamond Jubilee."