News tagged with brain activity

Related topics: brain · functional magnetic resonance imaging · brain regions · brain function · brain images

Using new technology to map signals in the brain

Sensors based on nanothreads that are superconducting in liquid nitrogen are offering new ways of measuring activity in the brain. In the future, the technique may revolutionize brain research and add to our knowledge of ...

Jan 14, 2016
popularity77 comments 0

Empathy with strangers can be learned

We can learn to empathize with strangers. Surprisingly positive experiences with people from another group trigger a learning effect in the brain, which increases empathy. As researchers from the University of Zurich reveal, ...

Dec 21, 2015
popularity157 comments 2

UA researchers developing brain-mapping technology

Researchers at the University of Arizona are developing a noninvasive brain-scanning technology that could produce images far superior to those obtained with the most commonly used systems—electroencephalography and functional ...

Dec 17, 2015
popularity40 comments 0

Electroencephalography

Electroencephalography (EEG) is the recording of electrical activity along the scalp produced by the firing of neurons within the brain. In clinical contexts, EEG refers to the recording of the brain's spontaneous electrical activity over a short period of time, usually 20–40 minutes, as recorded from multiple electrodes placed on the scalp. In neurology, the main diagnostic application of EEG is in the case of epilepsy, as epileptic activity can create clear abnormalities on a standard EEG study. A secondary clinical use of EEG is in the diagnosis of coma and encephalopathies. EEG used to be a first-line method for the diagnosis of tumors, stroke and other focal brain disorders, but this use has decreased with the advent of anatomical imaging techniques such as MRI and CT.

Derivatives of the EEG technique include evoked potentials (EP), which involves averaging the EEG activity time-locked to the presentation of a stimulus of some sort (visual, somatosensory, or auditory). Event-related potentials refer to averaged EEG responses that are time-locked to more complex processing of stimuli; this technique is used in cognitive science, cognitive psychology, and psychophysiological research.

This text uses material from Wikipedia, licensed under CC BY-SA

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