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It is also a good idea to have some free electrodes that are designed to replace faulty cap electrodes, in case there is a problem in the wiring that cannot be detected from a surface check. Free electrodes can also be placed on various parts of the face to record eye and facial movement, allowing data that contains movement artifacts to be discarded.
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Make sure all of your supplies are easily accessible and in working order.
How long does an eeg take code#
If possible, get things set up so that all you have to do is enter a single subject code before starting the stimuli presentation program. Set up all the appropriate programs from stimuli presentation and signal recording so that there is as little left to do when the subject arrives as possible. Reboot the ancient machine that displays the stimuli. Anything you can do to prepare ahead of time, to ease your subject's mind, and to make the lab seem like a well-oiled machine will only increase the likelihood that you will get clean, usable data.Īrrive at least 1/2 hour prior to the subject's arrival. Any sort of muscular tension will create an electrical signal much larger than the signal you are trying to measure. At the scalp, the electrical signal from the brain is very weak. There is one underlying principle to keep in mind each time you record an EEG to ensure that you are properly prepared: Nervous, uncomfortable people make terrible EEG subjects. Other labs probably have different standards for subject preparation. *Please note: the content of this writeup is derived solely from my experience in the two EEG laboratories where I have worked (both of which were labs in universities which relied on scalp rather than intracranial electrodes).