Smoking marijuana (cannabis) affects mental performance, especially in the case of young people, a new study from Duke University in Durham (North Carolina), which publishes the magazine Proceedings of the National Academy of Sciences (PNAS).
The team led by Madeline Meier found in this research, conducted over nearly 40 years, cannabis irreversibly damages the central nervous system and can lower intelligence quotient (IQ).
According to experts, the reduction of IQ is higher the earlier the age at which they start using marijuana. For regular users, the research shows that clearly worsen certain areas of the brain, and that this state is maintained over the years.
Furthermore, the study shows that regular cannabis smokers have more trouble concentrating or remembering.
For young people, the research warns that become regular users, which increases the earlier contact is made with the drug.
This also affects the CI, for the study of the young brain is not able to recover from the damage caused by cannabis. During the growth stage, the brain undergoes critical changes, and cannabis use has consequences that damage the nervous system permanently.
The team around Meier investigated for this study over 38 years more than 1,000 people born in New Zealand in the early 70s.