Wrist, Hand & Finger Pain Causes. If you have pain the hand, understand potential causes of hand or wrist pain including arthritis, injury or other conditions. Read More >>. If you have wrist and hand pain, learn what steps your doctor may take to provide you with a diagnosis of arthritis or other condition.
Marijuana also affects brain development. When people begin using marijuana as teenagers, the drug may reduce thinking, memory, and learning functions and affect how the brain builds connections between the areas necessary for these functions.
Substantial evidence from animal research and a growing number of studies in humans indicate that marijuana exposure during development can cause long-term or possibly permanent adverse changes in the brain.he ability to draw definitive conclusions about marijuanaâs long-term impact on the human brain from past studies is often limited by the fact that study participants use multiple substances, and there is often limited data about the participantsâ health or mental functioning prior to the study.