In recent decades science has developed increasingly sophisticated techniques for investigating the brain and nervous system. Among the most important tools are microelectrode techniques; macroelectrode techniques (ERP); structural imaging (CAT scanning, MRI); functional imaging (EEG imaging, MEG, MSI), and tools such as PET scanning that use radioactive energy to map brain activity. Scientists often combine these techniques to study brain activity in unprecedented detail.
An EEG recording of one person's alpha brain waves. Red and violet colors indicate greater alpha-wave activity.
In an EEG, electrodes attached to the scalp are used to create a picture of neural activity in the brain.
 |
 |