Neuroscience
Biomedical engineers connecting a human brain to the internet in real time
In research thought to be a world first, biomedical engineers at Wits are connecting a human brain to the internet in real time.
Sep 14, 2017
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966
News tagged with brain waves
Psychology & Psychiatry
Our brains process irony in emojis, words in the same way
That winky-face emoji that you use at the end of a text isn't just a fun picture added to your sentence. It can convey linguistic meaning that changes the interpretation of the sentence, a new study finds.
Sep 6, 2018
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53
Neuroscience
How we sleep today may forecast when Alzheimer's disease begins
What would you do if you knew how long you had until Alzheimer's disease set in? Don't despair. New research from the University of California, Berkeley, suggests one defense against this virulent form of dementia—for which ...
Sep 3, 2020
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2002
Alzheimer's disease & dementia
Improving deep sleep may prevent dementia, study finds
As little as 1% reduction in deep sleep per year for people over 60 years of age translates into a 27% increased risk of dementia, according to a study which suggests that enhancing or maintaining deep sleep, also known as ...
Oct 30, 2023
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491
Neuroscience
Babies found to be more likely to accept unfamiliar women when the odor of their mother is present
A team of researchers from the Interdisciplinary Center, in Israel, working with a colleague from Canada, has found that babies are more likely to accept an unfamiliar woman when the odor of their mother is present. In their ...
Neuroscience
Buzzing the brain with electricity can boost working memory
Scientists have uncovered a method for improving short-term working memory, by stimulating the brain with electricity to synchronise brain waves.
Mar 14, 2017
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1050
Neuroscience
High doses of ketamine can temporarily switch off the brain, say researchers
Researchers have identified two brain phenomena that may explain some of the side-effects of ketamine. Their measurements of the brain waves of sheep sedated by the drug may explain the out-of-body experience and state of ...
Jun 11, 2020
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1323
Neuroscience
Waves move across the human brain to support memory
The coordination of neural activity across widespread brain networks is essential for human cognition. Researchers have long assumed that oscillations in the brain, commonly measured for research purposes, brain-computer ...
Jun 7, 2018
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2623
Neuroscience
Doctors find patient brain activity continued for 10 minutes after death
A team of doctors affiliated with the University of Western Ontario in Canada has documented a case in which a terminal patient removed from life support continued to experience brain wave activity for approximately 10 minutes ...
Neuroscience
Can deep sleep help devastating brain disorders? Scientists studying Parkinson's want to find out
Sleep may be one of the most potent medicines for the brain, scientists are discovering, as they explore the inner labyrinths of the three-pound organ during deep sleep and dream cycles in both health and disease.
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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