-------------------------------------------------------------------------------------------------------------------------------

Explains the vulnerability of teenagers to the effects of drugs. Differentiates the developing adolescent brain and the more developed young adult brain. Discusses the possible negative effects on cognition with early cannabis use. This supports my argument that cannabis use affects teenage brain development in negative ways. The effects of marijuana are stronger in teenagers than in young adults. 
"Younger brains exhibit greater plasticity,... As a result, drugs like cannabis are more likely to alter synaptic connections in younger brains, leading to stronger memories of pleasure and reward."

-------------------------------------------------------------------------------------------

In chapter 4 of the book, Eagleman explains decision-making and how the brain processes possible choices. Discusses how dopamine and other chemical reactions play a part in making one option more attractive than others. This has to do with the desire for instant gratification. Teenagers' reward system has a strong desire for positive outcomes, no matter the consequences.
“They’re [neurons] all releasing chemicals that excite or depress each other.” (Eagleman 113) 

--------------------------------------------------------------------------------------------------------------------
Describes the neurological effects cannabis has on cognition, brain function, and brain structure. Discusses the varying effects it has according to frequency and the age of the user. This supports my claim that marijuana affects the brain, especially one that is still in its developmental stages. It reinforces the idea that adolescent brains are more affected than adult brains. “While the direction...of findings are often variable...MJ use is typically associated with altered patterns of brain activation...during tasks of executive function"