The effect of marijuana on the human brain? short- and long-term effects
Marijuana, also known as cannabis, has been used for centuries both for recreational and medical purposes. Its main psychoactive component is delta-9-tetrahydrocannabinol (THC), which acts on the endocannabinoid system in the brain. The effect of THC on cannabinoid receptors produces a wide range of effects, both beneficial and potentially harmful. Understanding the impact of marijuana on the human brain is crucial for patients, doctors, and others to make informed choices about their use.
Short-term effects of marijuana
When marijuana is introduced into the body, THC quickly enters the bloodstream and then reaches the brain, affecting various of its functions:
1. Perceptual changes
One of the most common short-term effects is a change in the perception of time, space, and sensory sensations. Marijuana users often describe the feeling of slowing down time, the intensification of external stimuli, as well as changes in the perception of taste, sound or touch.
2. Cognitive impairment
THC intake can temporarily reduce concentration, short-term memory, and motor coordination. This can have a negative impact on daily activities, such as driving, making decisions or doing work effectively.
3. Mood changes
Marijuana affects the limbic system, which is responsible for regulating emotions. As a result, users may feel euphoria, calm, relaxation, but sometimes there is also anxiety, depression or even panic episodes. The reaction depends on the dose, method of consumption and individual tolerance.
4. Increased appetite
Known as “gastropase,” a sudden increase in appetite is a common effect after eating marijuana. The mechanism of this phenomenon is related to the effect of THC on the hunger center in the hypothalamus.
Long-term effects of marijuana use
With regular marijuana abuse, there is a risk of long-term changes in the brain. Key consequences include:
1. Structural changes of the brain
Research indicates that people who regularly use marijuana may have a decrease in hippocampal volume? structure responsible for learning processes and memory. Long-term use can also affect the functioning of the prefrontal cortex, associated with decision-making and planning.
2. Permanent cognitive impairment
Although some deficits may be reversible after a long period of abstinence, regular marijuana use is associated with persistent problems with memory, attention, and executive functions. This is especially true when use begins during puberty, when the brain continues to develop intensively (up to the age of 21). The abuse of marijuana for more than 10 years carries the risk of permanent changes in brain function (CUD – cannabis use disorder).
3. Increased risk of mental disorders
There is evidence of a link between intensive marijuana use and the risk of faster development of psychotic disorders in predisposed people. People with a genetic predisposition (e.g. to schizophrenia) may be more susceptible to the development of such disorders. Marijuana can also exacerbate symptoms of anxiety and depression (THC).
4. Risk of addiction
Although marijuana is often seen as less addictive than other psychoactive substances, there is a risk of developing psychological and in some cases physical dependence. Marijuana addiction can lead to difficulty controlling use and negative impacts on personal and professional life.
How to minimize the risk associated with marijuana?
Use in moderation: A conscious and responsible approach to the use of cannabis is crucial. Patients who are considering using cannabis for medicinal purposes should consult a doctor.
Limiting exposure at a young age: Using marijuana during adolescence can be particularly harmful due to brain development.
Mental health monitoring: People with a history of mental disorders should be especially careful about using marijuana to minimize the risk of deterioration.