Final answer:
The main advantage of magnetoencephalography (MEG) over electroencephalography (EEG) is that MEG localizes the spatial origin of the signal. The correct answer is C.
Step-by-step explanation:
The main advantage of magnetoencephalography (MEG) over electroencephalography (EEG) is that MEG localizes the spatial origin of the signal. Unlike EEG, which measures electrical brain activity using electrodes placed on the scalp, MEG measures the weak magnetic signals produced by abnormal electrical discharges in the brain. This ability to pinpoint the spatial origin of the signal is particularly useful for studies of brain activity in conditions like Alzheimer's disease and epilepsy.
The main advantage of MEG over EEG is its ability to precisely localize the spatial origin of brain signals, facilitated by sensitive SQUID sensors.
Main Advantage of Magnetoencephalography (MEG) Over Electroencephalography (EEG)
The main advantage of magnetoencephalography (MEG) over electroencephalography (EEG) is that MEG can more accurately localize the spatial origin of the signal. Unlike EEG, which measures the electrical activity through the scalp, MEG measures the magnetic fields produced by neural activity. Thanks to the use of sensors such as the superconducting quantum interference device (SQUID), which operates at liquid helium temperatures, MEG can detect magnetic fields thousands of times smaller than the Earth’s, allowing for precise localization. This makes it particularly useful in neurological studies, such as those focusing on Alzheimer's disease and epilepsy, where understanding the exact location of abnormal brain activity is critical.