News tagged with brain activity

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

Neurons constantly rewrite their DNA

Johns Hopkins scientists have discovered that neurons are risk takers: They use minor "DNA surgeries" to toggle their activity levels all day, every day. Since these activity levels are important in learning, memory and brain ...

Apr 27, 2015
popularity2481 comments 67

'Chemo brain' is real, say researchers

UBC research shows that chemotherapy can lead to excessive mind wandering and an inability to concentrate. Dubbed 'chemo-brain,' the negative cognitive effects of the cancer treatment have long been suspected, but the UBC ...

Apr 27, 2015
popularity621 comments 1

Study sheds new light on brain's source of power

New research published today in the journal Nature Communications represents a potentially fundamental shift in our understanding of how nerve cells in the brain generate the energy needed to function. The study shows neurons ...

Apr 24, 2015
popularity235 comments 2

How do we hear time within sound?

How does our auditory system represent time within a sound? A new study published in PLOS Computational Biology investigates how temporal acoustic patterns can be represented by neural activity within auditory cortex, a major ...

Apr 16, 2015
popularity58 comments 1


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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