Question

you want to measure billies brain activity from the visual cortex, which is in the occipital lobe at back of brain. you want to measure brain activity very fast (milliseconds) and from the outer surface of the brain. what neuroimaging method should you use?
diffusion mri
electroencephalography (eeg)
functional mri (fmri)
positron emission tomography (pet)

Explanation:

EEG measures electrical activity on the brain's outer surface with millisecond - level temporal resolution. Diffusion MRI focuses on water diffusion in neural pathways. fMRI measures blood - oxygen - level - dependent (BOLD) signals with lower temporal resolution (seconds). PET uses radioactive tracers and also has lower temporal resolution compared to EEG.

Answer:

ElectroEncephaloGraphy (EEG)