Magnetoencephalography (MEG) explained! | Neuroscience Methods 101 скачать в хорошем качестве

Magnetoencephalography (MEG) explained! | Neuroscience Methods 101

Magnetoencephalography (MEG) picks up signals from synchronously firing neurons, resulting in an oscillating signal. Similar to electroencephalography (EEG), magnetoencephalography, or MEG, picks up the activity from neurons that fire in synchrony. Since neuronse communicate through action potentials, there is a constant influx and outflux of electrically charged particles. When a group of neurons is active together this electrical charge is large enough to be picked up. With EEG this electrical charge is measured directly at the scalp. However, with MEG the magnetic component of this electrical charge is measured. At the MEG sensors (superconducting quantum interference devices, SQUID), this magnetic signal is translated back to an electrical signal, resulting in similar brain waves as can be seen with EEG. EEG and MEG pick up similar neurophysiological processes, but they are not the same. MEG picks up signals mainly from sulcul walls. Furthermore, since MEG signals are not distorted by the skull, MEG has a much greater spatial resolution. In other words, MEG is better at locating where a signal comes from. However, this advantage comes with a cost. MEG is more expensive than EEG. References/Resources: Baillet, S. (2017). Magnetoencephalography for brain electrophysiology and imaging. Nat Neurosci 20, 327–339. https://doi.org/10.1038/nn.4504 Supek, S., Aine, C. J. (2014). Magnetoencephalography. From signals to dynamic cortical networks. SpringerLink, New York. Narrated by: Miles Wischnewski USE OF STOCK IMAGES AND VIDEOS Occasionally we make use of stock images and videos (pixabay.com or pexels.com). We use these to make our videos more lively (better than looking at a blank screen). These stock videos should not be taken as an exact scientific reflection of the discussed content. In some cases they are not fully accurate. We try to have a high viewing pleasure, while at the same time create as little confusion as possible. Thus we aim to only use them when it is clear that they are not directly related to the discussed content. CHANNEL GOALS The Psyched! channel focuses on providing education about psychology and neuroscience. Here you learn all about human behavior, the mind and the brain. It is our goal to reach everyone, from people who are casually interested to academic researchers. As such we provide simple explanation videos as well as profound lectures. If you like our content, consider to subscribe! SOCIAL MEDIA LINKS Instagram:   / real.psyched   Twitter:   / mileswischnews1   Website: www.mileswischnewski.com