Cathode-ray-tube monitor artefacts in neurophysiology

Zele, Andrew J. & Vingrys, Algis J. (2005) Cathode-ray-tube monitor artefacts in neurophysiology. Journal of Neuroscience Methods, 141(1), pp. 1-7.

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We demonstrate that cathode-ray-tube (CRT) monitors commonly used as stimulus generators in visual neuroscience produce signal artefacts. This arises from two factors, one being the finite time needed for the raster scan of the CRT to cross the receptive field being stimulated, and the other being the restraint imposed by the impulse response of the phosphor itself. Together these factors result in smearing or blurring that manifests as high frequency noise, distorting the desired signal applied by the investigator. Our analysis identifies those conditions that promote these artefacts and we describe methods for their minimisation. We suggest that a monitor frame rate ≥100 Hz provides a reasonable trade-off between refresh and the generators of high frequency noise.

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26 citations in Web of Science®

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ID Code: 7475
Item Type: Journal Article
Refereed: Yes
Additional Information: Articles free to read on journal website after 6 months
DOI: 10.1016/j.jneumeth.2004.05.005
ISSN: 0165-0270
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2005 Elsevier
Deposited On: 04 May 2007 00:00
Last Modified: 02 Feb 2015 02:07

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