In a 2004 Study Examining the Neurological Effects of Cannabis

question 53

Multiple Choice

In a 2004 study examining the neurological effects of cannabis use, 12 long-term cannabis users (at least seven times a week) and 10 nonusers performed a spatial working memory task while a fMRI was conducted on their brain activity. Results indicated:

• A) nonusers displayed greater and more pervasive brain activation than nonusers.
• B) heavy cannabis users displayed less and more-limited brain activation than nonusers.
• C) heavy cannabis users displayed greater and more pervasive brain activation than nonusers.
• D) there was no significant difference in brain activation among heavy and nonusers.

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Definitions:

Paleontologists

Scientists who study the history of life on Earth through the examination of fossilized remains and traces of organisms.

Carbon Dating

A method used to determine the age of an object containing organic material by measuring the decay rate of carbon-14 isotopes.

Rock Layers

Strata or beds of sedimentary rock that have been deposited over time, providing clues to Earth's geological history.

Hominins

Members of the human lineage, including modern humans and all our direct ancestors, characterized by bipedalism and larger brain sizes than other primates.