Question

in 1929, the ____________ made non - invasive study of the brain possible.
(1 point)

○ positron emission tomography (pet) scan
○ computed tomography (ct) scan
○ electroencephalograph (eeg)
○ x - ray

Explanation:

The electroencephalograph (EEG) was invented in 1929 by Hans Berger. It records electrical activity of the brain non - invasively. PET scans (developed in the 1970s), CT scans (developed in the 1970s), and X - rays (developed in 1895) do not match the 1929 time frame for non - invasive brain study as well as EEG.

Answer:

electroencephalograph (EEG)