Final answer:
The four main ways of directly studying the brain are brain imaging techniques, electroencephalography, brain injury studies, and autopsies.
Step-by-step explanation:
The four main ways of directly studying the brain are:
- Brain imaging techniques: such as functional magnetic resonance imaging (fMRI), positron emission tomography (PET), and computerized tomography (CT) scans, which provide insight into different aspects of brain function.
- Electroencephalography (EEG): a technique that measures electrical activity in the brain using an array of electrodes placed around a person's head.
- Brain injury: studying individuals who have suffered brain injury to determine how different areas of the brain are affected.
- Autopsies: historically, scientists relied on autopsies of individuals with brain injury and behavioral changes to understand the functions of different parts of the brain.