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Re: Solutions for sending triggers in an AEP (EEG) experiment?
Somewhat dated test results of the timing characteristics of inexpensive
sound cards can be found at
For better quality cards, delays between the parallel port trigger range
from 0.3-0.5 ms (mean), with a variance (time jitter) of less than 0.1
ms. This is good enough for most AEPs (except perhaps the cochlear
microphonic or ABRs) provided that you correct for the mean delay.
David L. Woods, Professor of Neurology, Dept. of Neurology,UC Davis,
Chief, Clinical Neurophysiology and Chief, Research MRI,
Neurology Service (127E), Bldg. R4, VANCHCS, 150 Muir Rd., Martinez, CA 94553
Tel (925) 372-2571, Fax (925) 229-2315 Email:dlwoods@xxxxxxxxxxx