click below
click below
Normal Size Small Size show me how
Neural Measures
Term | How Does It Work? | Sample Finding |
---|---|---|
Electroencephalography (EEG) | Electrodes placed on the scalp measure electrical activity in neurons | Symptoms of depression and anxiety correlate with increased activity in the right frontal lobe, a brain are associated with behavioral withdrawal and negative emotion |
Magnetoencephalography (MEG) | A head coil records magnetic fields from the brain's natural electrical currents | Soldiers with posttraumatic stress disorder (PTSD), compared with soldiers who do not have PTSD, show stronger magnetic fields in the visual cortex when they view trauma-related images. |
Computed Tomography (CT) | X-rays of the head generate images that may locate brain damage. | Children's brain injuries, shown in CT scans, predict impairments in their intelligence and memory processing |
Positron Emission Tomography (PET) | Tracks where in the brain a temporarily radioactive form of glucose goes while the person given it performs a task. | Monkeys with an anxious temperament have brains that use more glucose in regions related to fear, memory, and expectations of reward and punishment |
Magnetic Resonance Imaging (MRI) | People sit or lie down in a chamber that uses magnetic fields and radio waves to provide a map of brain structure. | People with a history of violence tend to have smaller frontal lobes, especially in regions that aid mora judgment and self-control. |
Functional Magnetic Resonance Imaging (fMRI) | Measures blood flow to brain regions by comparing continuous MRI scans | Years after surviving a near plane crash, passengers who viewed material related to their trauma showed greater activation in the brains fear, memory, and visual centers than when they watched footage related to the 9/11 terrorist attacks |