How the Brain Works, EEG, Electrical Activity of Brain
Published on May 17, 2012This video attempts to explain the working of the brain through mapping out the electrical activity of the brain - Electro-encephalogram (EEG)
Standard YouTube License @ DrProdigious
How To See Your Brain Working - Measuring Electrical Activity Using EEG
Published on Mar 15, 2013Mike Batashvili from the University of Derby gives an introduction to electroencephalography (EEG) and the brain. We find out what EEG is, how we use it and what it's used for and see a short example of a study carried out by the University of Derby's Psychology department.
For more information on the University of Derby visit http://www.derby.ac.uk
Standard YouTube License @ UniversityofDerby
Measuring Brain Waves with an EEG (Electroencephalogram)
Uploaded on Aug 30, 2011This video shows the basic set up of an EEG, what the trace from an EEG looks like and what the waves mean. The tests were carried out by Trainee Clinical Neurophysiologists.
There are more videos like this in the Physiology Play list on ClassroomMedicsTV YouTube Channel.
You can also download free teaching resources from our website http://www.classroommedics.co.uk/free-lesson-plans.html or http://www.classroommedics.co.uk
Standard YouTube License @ ClassroomMedicsTV
Clean Up EEG Data
Uploaded on May 1, 2010An introduction into the electroencephalogram.
I cover what this neuroimaging method measures and how scientists are able to process the raw EEG data into something meaningful.
For information on doing your own EEG, here's some tips on how to get rid of artifacts during the data acquisition:
1- try to get something that the subject can lean his chin against while looking at the screen. you want all of the subject's neck, head, and jaw muscles to be completely relaxed. we used something that basically mimicked someone holding your head in place. you want to make sure that they don't move their head, swallow, or look around during the study
2- make sure while you are running the study that you give the subject breaks 10 sec-1min during the study. this will allow some time for the subject's brain to "zone out" a little bit. this way while your subject is actually focusing, their brain will be able to do so better.
3- blinking is a huge source of artifacts. so if the subject has contact lenses, please ask him to bring his glasses that day. contacts dry out the eye and cause more blinking to occur.
4- temperature- make sure that the temperature of the room is balanced, if the subject is hot, their skin will sweat and this will create artifacts in your data. but if you are using air conditioning to keep the room cool, make sure you don't overdo it. keeping the air conditioning on high will dry out the subject's eyes, causing them to blink more.
hope that helps!
-Aki
Standard YouTube License @ SuperAkihabara
EEG Artefacts: 'Mind' or Just Muscle Activity?
Published on Jun 20, 2013It is important to be able to distinguish between EEG and, for example, muscle activity in times where people claim to read the 'mind' but often just register facial muscle activity or eye movements.
Muscle activity (EMG) is in the region of 1mV whereas EEG is in the region of 10uV, thus 100 times smaller. Both, EEG and EMG cover similar frequency ranges. Both, EEG and EMG are hard to control consciously. Electric fields from the surrounding area such as mains cables induce voltages in the cables of about 100mV and therefore about 10,000 times stronger than any EEG. Ideally the differential amplifier takes care of these influences but when moving around this is not 100% accurate so that movement artefacts might look like slow EEG waves. Eye movements are the third problem which have also pretty high amplitudes in the region of 1mV.
Overall EMG is the main problem because it is always there (except in totally paralysed patients) and it is tricky (though not impossible) to gauge what is EMG and what is EEG. Ideally it requires a subject to consciously minimise their EMG and at the same time is able to control their EEG.
Presenters: Vasso Georgiadou & Cat MacLeod http://biosignals.berndporr.me.uk
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How to Prepare for an Outpatient EEG
Uploaded on Sep 22, 2010EEG is an abbreviation for "electroencephalogram", which is a recording of the electrical activity generated by the neurons of the brain. An EEG testing can be performed for various reasons; which include epilepsy, syncope or passing out spells, and mental status changes. For more information, visit http://bit.ly/ZrVcpo
Standard YouTube License @ ClevelandClinic
EEG - 101 - Basic Concepts
Uploaded on Nov 29, 2011A basic tutorial on electroencephalograms (EEG)
Standard YouTube License @ EEGucation
EEG Trace (i.e. Waves) Tutorial
Uploaded on Nov 27, 2011Review of a normal EEG
Standard YouTube License @ EEGucation
Intracranial Depth Electrode Recording
Published on May 31, 2013SSTattler: Interesting!
Review of intracranial EEG
Standard YouTube License @ EEGucation
Brain-Computer Interface Used for Rehabilitation After a Stroke
Published on Jan 23, 2013Within the TOBI european research project (www.tobi-project.org), led from EPFL (www.epfl.ch) by Prof. José del R. Millán, a patient of the SUVAcare rehabilitation clinic in Sion (Switzerland) uses a brain-computer interface (BCI) to help him recover the mobility of his paralyzed right arm. The EEG reads his brain waves as he concentrates on moving his hand; the computer recognizes the pattern and then sends an impulse in the electrodes stimulating the arm's muscles, as explains Dr. Abdul Al-Khodairy, physician at the SUVAcare clinic.
Scientists have found out that this technique can help disabled people to "reconnect" their brain to their muscles in certain cases - an effect that remains after using the BCI.
Standard YouTube License @ epflnews
Electrode Grid Visualization with Analyze 10.0 - Webinar
Uploaded on Jul 29, 2011Learn how to visualize subdural electrodes on the surface of the cortex using Analyze 10.0. During this Webinar you'll see how to:
- Register a pre-operative MRI to a post-operative CT with electrodes
- Segment the electrodes from the post-operative CT
- Extract the brain from the co-registered pre-operative MRI
- Create a 3D volume rendering with the extracted brain and the segmented electrodes.
Standard YouTube License @ AnalyzeDirect
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