News tagged with brain activity

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

Changing activity in the ageing brain

Normal ageing affects our ability to carry out complex cognitive tasks. But exactly how our brain functions change during this process is largely unknown. Now, researchers in Malaysia have demonstrated that ageing changes ...

May 29, 2015
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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
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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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