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Maintaining low and stable electrode contact impedances is critical for obtaining high quality signals in out-of-the-lab EEG units. Current EEG units measure the impedance of the electrode contacts by injecting an out-of-band, typically 1 kHz, current into the head. This high frequency component is easily isolated from the true EEG to avoid introducing artifacts, but does not give direct information...
Transcranial Current Stimulation (tCS) is a recent development for non-invasive brain stimulation. At present tCS introduces large artifacts into simultaneous EEG (electroencephalogram) recordings, which must be removed to enable brain changes from during the stimulation to be monitored. This paper presents a new approach for removing artifacts of transcranial Alternating Current Stimulation (tACS)...
Conventional EEG (electroencephalography) has relied on wet electrodes which require conductive gel to help the electrodes make contact with the scalp. In recent years many dry electrode EEG systems have become available that do not require this gel. As a result they are quicker and easier to set up, with the potential to record the the EEG in situations and environments where it has not previously...
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