Friday, 24 June 2016

Marijuana:What is Effects of Weed on Brain and Body

What is Marijuana?

Marijuana is a combination of shredded leaves, stems and flower buds of the Cannabis sativa plant.The intoxicating chemical in marijuana is tetrahydracannabinol, or THC.  Marijuana can be smoked, eaten, vaporized, brewed and even taken topically, but most people smoke it. to understand better read 
20 Cool Fact About Marijuana

What Mr. President Obama has said ?

"As has been well documented, I smoked pot as a kid, and I view it as a bad habit and a vice, not very different from the cigarettes that I smoked as a young person up through a big chunk of my adult life,"

How cannabis is consumed ?

According to  2010 National Survey on Drug Use and Health (NSDUH), 17.4 million people in the United States said they had used marijuana in the past month. According to the survey, marijuana is the most commonly used illegal drug. About 4 in 10 Americans have used marijuana at least once in their lives, according to the National Institutes of Health.

The cannabis (called "pot," "weed," "grass," etc.) is typically spread on rolling papers and formed into a cigarette, often referred to as a joint, or a cigar-like blunt. Smoking releases the THC, which is absorbed into the blood stream through the lungs. Glass pipes, bubblers and bongs are other ways to smoke marijuana.
Marijuana can also be ingested in food, often a choice of those who are using medical marijuana. Aside from the popular “pot brownie,” edible marijuana can be added to a number of foods, including candy, ice cream and butter.
Cannabis can be taken in liquid form, by brewing it as a tea. It can also be added to other beverages, including soda, milk and alcohol. Hashish is a resin made of the concentrated plant material. Other forms include capsules, oral sprays and topical oils. 

How marijuana affects the mind

Marijuana reaches the same pleasure centers in the brain that are targeted by heroin, cocaine and alcohol.
Depending on the quantity, quality and method of consumption, marijuana can produce a feeling of euphoria — or high — by stimulating brain cells to release the chemical dopamine. When smoked or otherwise inhaled, the feeling of euphoria is almost immediate. 
Other changes in mood can occur, with relaxation frequently being reported. Some users experience heightened sensory perception, with colors appearing more vivid and noises being louder. For some, marijuana can cause an altered perception of time and increased appetite, known as the “munchies.”
The impact can vary by person, how often they have used the drug, the strength of the drug and how often it has been since they have gotten high, among other factors.
Other effects, according to the NIH, include:
  • Feelings of panic, anxiety and fear (paranoia)
  • Hallucinations
  • Increased heart rate
  • Trouble concentrating
  • Decreased ability to perform tasks that require coordination
  • Decreased interest in completing tasks
When coming down from the high, users may feel depressed or extremely tired. While marijuana use produces a mellow experience (users are sometimes referred to as “stoners”) for some, it can heighten agitation, anxiety, insomnia and irritability, according to the NIH.

Marijuana and teens

When marijuana use begins in the teen years, it can have a significant impact on brain development, including decreased brain activity, fewer neural fibers in certain areas and a smaller than average hippocampus, which controls learning and memory functions.
According to a Northwestern Medicine study of teen marijuana users, memory-related structures in the brain appeared to shrink, a possible signs of a decrease in neurons.
These abnormalities remained two years after the teen stopped using marijuana, indicating that the drug has long-term effects and look similar to brains of schizophrenics.
Those who started using marijuana after 21 generally do not experience the same type of brain abnormalities as those who started using the drug earlier.
Long-term users report that they sometimes have trouble thinking clearly, organizing their thoughts, multitasking and remembering things. Sustained marijuana use can also slow reaction times in some individuals
While it is widely thought that marijuana is not addictive, about 9 percent of users become addicted to marijuana. Long-term marijuana users who try to quit experience cravings, irritability, sleeplessness, decreased appetite and anxiety — some of the same physical symptoms of those trying to quit other types of drugs or alcohol.

Sources :
American Cancer Society
Respiratory Effects of Marijuana (University of Washington)
National Institutes of Health
live science