Ainsley is participating in a study that aims to determine whether the occipital cortex becomes more active in response to moving versus stationary stimuli. when she arrives at the lab, she ingests a "tracer" and then enters the scanning machine. what type of brain imaging is most likely being conducted in this study?

Positron emission tomography (PET)

Explanation:

Positron emission tomography (PET) consists of the measurement of the physiological function by inspecting the flow of the blood, metabolic functions, radiolabelled drugs, and neurotransmitters. PET provides quantitative analyses making it possible to monitor relative changes as time passes, keeping control of the progress of a disease or how the person reacts to a stimulus. To do it, the person receives a low quantity of a radioactive tracer into his/her organism via injection.    

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.