The occipital cortex is the visual processing center of our brain, located in the rearmost portion of the skull. All the things that we see are processed here (although some processing does also occur before and after the signal arrives). EEG experiments with visual stimuli (videos, images) ...
How to measure heart activity? Heart activity can be recorded in two ways: 1. Electrocardiography (ECG, EKG) ECG records the electrical activity generated by heart muscle depolarizations (a negative change in the electric charge), which propagates as pulsating electrical waves towardsthe skin. Alt...
Generally, an HSAT measures breathing, snoring, pulse, and blood oxygen levels. Unlike a PSG, an HSAT does not usually measure brain waves, muscle activity, or heart activity beyond the pulse taken with a pulse oximeter. That means electrodes are not usually part of an HSAT. Sometimes, a...
Another way to measure brain activity is with a Magnetic Resonance Image (MRI). An MRI machine is a massive, complicated device. It produces very high-resolution images of brain activity, but it can't be used as part of a permanent or semipermanent BCI. Researchers use it to get benchmar...
There is an increasing interest in how ongoing spontaneous brain activity and personality provide a predisposition for the processing of environmental demands. It further has been suggested that the brain has an inherent sensitivity to the social environ
To understandwherethe neuronal signals are coming from, we need Functional Magnetic Resonance Imaging or fMRI. Unlike an EEG, fMRI does not measure the electrical impulses sent by the neurons, but rather records changes associated with the blood oxygenation in the brain. ...
A recent study conducted in Hungary, appearing in Current Biology, explores this issue. It involved 18 dogs and employed a non-invasive EEG procedure to measure their brain activity. Researchers played audio clips of their owners saying the names of objects, such as “ball” or “frisbee”, ...
Discover more about behavioral theories, different ways to measure human behavior, and research fields in which human behavior plays a central role.
When deep sleep occurs, these large spikes in brain activity widen out, turning into delta waves. And in order to confirm that you’ve entered this stage, those waves need to make up more than 20% of an EEG chart. If you’re in the deep sleep stage, you likely won’t know it ...
Some have considered a trial using EEG electrodes to monitor brain activity until death. The body isn’t feeling anything if the brainwave activity is almost nil. “How do you know these people aren’t suffering? It can be a valid question,” Downar said. “I can’t prove that they are...