Here is a terrific article I found on the internet written by an unknown author:
Pot, weed, grass, ganja and skunk, are some of the common words used to describe the dried leaves drug known as marijuana. Marijuana is a cannabis plant that is "usually smoked or eaten to entice euphoria." Throughout the years, there has been research on the negative and positive effects of marijuana on the human body and the brain. Marijuana is frequently beneficial to the treatment of AIDS, cancer, glaucoma, multiple sclerosis, and chronic pain. However, researchers such as Jacques-Joseph Moreau have been working to explain how marijuana has harmful affects on the functions of central nervous system and hinders the memory and movement of the user's brain. The focus of this article will be how the chemicals in marijuana, specifically cannabinoids and THC have an effect on the memory and emotions of a person's central nervous system.
Marijuana impinges on the central nervous system by attaching to brain's neurons and interfering with normal communication between the neurons. These nerves respond by altering their initial behavior. For example, if a nerve is suppose to assist one in retrieving short-term memory, cannabinoids receptors make them do the opposite. So if one has to remember what he did five minutes ago, after smoking a high dose of marijuana, he has trouble. Marijuana plant contains 400 chemicals and 60 of them are cannabinoids, which are psychoactive compounds that are produced inside the body after cannabis is metabolized or is extorted from the cannabis plant. Cannabinoids is an active ingredient of marijuana. The most psychoactive cannabinoids chemical in marijuana that has the biggest impact on the brain is tetrahydrocannibol, or THC. THC is the main active ingredient in marijuana because it affects the brain by binding to and activating specific receptors, known as cannabinoid receptors. "These receptors control memory, thought, concentration, time and depth, and coordinated movement. THC also affects the production, release or re-uptake (a regulating mechanism) of various neurotransmitters." Neurotransmitters are chemical messenger molecules that carry signals between neurons. Some of these affects are personality disturbances, depression and chronic anxiety. Psychiatrists who treat schizophrenic patient advice them to not use this drug because marijuana can trigger severe mental disturbances and cause a relapse.
When one's memory is affected by high dose of marijuana, short-term memory is the first to be triggered. Marijuana's damage to short-term memory occurs because THC alters the way in which information is processed by the hippocampus, a brain area responsible for memory formation. "One region of the brain that contains a lot of THC receptors is the hippocampus, which processes memory." Hippocampus is the part of the brain that is important for memory, learning, and the integration of sensory experiences with emotions and motivation. It also converts information into short-term memory. "Because it is a steroid, THC acts on the hippocampus and inhibits memory retrieval."THC also alters the way in which sensory information is interpreted. "When THC attaches to receptors in the hippocampus, it weakness the short-term memory,"and damages the nerve cells by creating structural changes to the hippocampus region of the brain. When a user has a high dose of marijuana, new information does not register into their brain and this may be lost from memory and they are not able to retrieve new information for more than a few minutes. There is also a decrease in the activity of nerve cells.
There are two types of memory behavior that is affected by marijuana, recognition memory and free cells. Recognition memory is the ability to recognize correct words. Users can usually recognize words that they previous saw before smoking but claim to recognize words that they did not previously see before smoking. This mistake is known as memory intrusions. Memory intrusions are also the consequence of THC affecting the free cell of the brain. "Marijuana disrupts the ability to freely recall words from a list that has been presented to an intoxicated subject."For example, if a list of vocabulary words presented to the intoxicated subject and few minutes later, they have to recall the words that were on the list. The only words that they remember are the last group of words and not the words that are in the beginning of the list. This is an initiation that their memory storage has been affected. "The absence of an effect at short term delay times indicates that cannabinodis did not impair the ability to perform the basic task, but instead produce a selective learning and/or memory deficit." A study was conducted with two college students (Student A and Student B) who both smoke marijuana every other week. This particular study was done an hour before, while and after they were under the influence of the drug. Student A was watching television before she smoked marijuana, was asked which advertisement was splayed before the show started and she got four out of five of her answers correct. After this first section, she smoked a small dose of marijuana twice within an hour. Fifteen minutes after she smoked her last blunt, she continued her regular activity of watching sitcoms. When a commercial would come on, she was asked simple questions like what happened before the show went to a commercial break. Her responses were macro-answers about what was going on but when she was asked what the main character was wearing, she did not remember. This was ironic because the protagonist wore a bright yellow suit that this individual commented on earlier when the show began ten minutes ago. Her short-term memory weakened because she was only able to remember big picture information and not small picture.
Marijuana also impairs emotions. When smoking marijuana, the user may have uncontrollable laughter one minute and paranoia the next. This instant change in emotions has to do with the way that THC affects the brain's limbic system. The limbic system is another region of the brain that governs one's behavior and emotions. It also "coordinates activities between the visceral base-brain and the rest of the nervous system."
Students B was an articulate and well spoken young woman who has a troublesome relationship with her best friends which gets her upset and causes her to become stressed. However after she smoked one high dose weed, her body was relaxed but she had trouble formulating her thoughts clearly and would talk in pieces while becoming extremely jubilant. It has been determined that a person needs to have high dose of marijuana to remain in the state of euphoria. High dose of marijuana,measured as "15mg of THC, can cause increased heart rate, severe motor disturbances, and can lead to panic attacks."Thankfully, Student A did not experience any of these extreme examples.
College students usually smoke marijuana because they are stressed over schoolwork and feel that marijuana can help them unwind. The effects of happiness that marijuana usually cause to the user is not a lasting effect because even though a user smokes weed to get away from the troubles of his/her own life, they still have to face these problems after the effects of the drug wears-off. In a survey with college student found that "compared to the light users, heavy marijuana users made more errors and had more difficulty sustaining attention.".
The chemicals in marijuana bring cognitive impairment and troubles with learning for the user. "Smoking marijuana causes some changes in the brain that are like those caused by cocaine, heroin, and alcohol. Some researchers believe that has changes may put a person more at risk of becoming addicted to other drugs such a cocaine and heroin." To prevent such harm, one must be cautious of their actions. Those who do not do drugs do not risk harm. So please the next day you light up, remember that you central nervous system and brain will be at risk.
Now you can see why this verse is so relevant:
1 Corinthians 6:19-20
Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your body.
