Final answer:
The electrical activity of the brain is measured using EEG (electroencephalography), which utilizes electrodes placed around the head. Other brain imaging techniques include fMRI, CT scans, and PET scans, each providing different levels of detail and information.
Step-by-step explanation:
The electrical activity of the brain can be measured using electroencephalography (EEG). EEG provides a measure of the brain's electrical activity through an array of electrodes that are placed around a person's head, which can prove quite helpful for understanding overall brain activity.
Other imaging techniques like functional magnetic resonance imaging (fMRI), computed tomography (CT) scans, and positron emission tomography (PET) scans offer different levels of detail and information about the brain. For example, fMRI generates a 3D map of the most active areas of the brain by tracking blood flow and oxygen levels, giving insights into brain activity over time and with high detail. CT scans provide cross-sectional images of the brain and can reveal structural anomalies. PET scans use a radioactive tracer to create images of active blood flow and physiological activity but involve exposure to radiation and offer less detail in terms of exact location and timing of brain activity compared to fMRI.