News tagged with brain waves

Related topics: brain , proceedings of the national academy of sciences , brain activity , electrical activity

Rare neurons enable mental flexibility

Behavioral flexibility—the ability to change strategy when the rules change—is controlled by specific neurons in the brain, Researchers at the Okinawa Institute of Science and Technology Graduate University ...

Jun 24, 2015
popularity 39 comments 0

Speech recognition from brain activity

Speech is produced in the human cerebral cortex. Brain waves associated with speech processes can be directly recorded with electrodes located on the surface of the cortex. It has now been shown for the first ...

Jun 16, 2015
popularity 72 comments 0

Understanding and healing concussion

In recent years, many Canadians have become aware of traumatic brain injury (TBI) through the reporting of concussions suffered by hockey players and other athletes. In addition to widespread sports-related ...

Mar 23, 2015
popularity 8 comments 0

Brain waves predict our risk for insomnia

There may not yet be a cure for insomnia, but Concordia University researchers are a step closer to predicting who is most likely to suffer from it—just in time for World Sleep Day on March 13.

Mar 11, 2015
popularity 23 comments 0

How brain waves guide memory formation

Our brains generate a constant hum of activity: As neurons fire, they produce brain waves that oscillate at different frequencies. Long thought to be merely a byproduct of neuron activity, recent studies suggest that these ...

Feb 23, 2015
popularity 138 comments 0

Modeling shockwaves through the brain

Since the start of the military conflicts in Iraq and Afghanistan, more than 300,000 soldiers have returned to the United States with traumatic brain injury caused by exposure to bomb blasts—and in particular, ...

Sep 29, 2014
popularity 0 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.

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