PMID: 2487083Jan 1, 1989Paper

Integration regions for vernier acuity in the cat: comparative aspects of cortical scaling

Visual Neuroscience
M A Berkley

Abstract

The spatial region involved in vernier acuity (integration region) was behaviorally determined in cats and compared with published human data and cortical scaling parameters for the two species. Integration region was estimated from vernier thresholds obtained with: (1) gaps of various sizes between the contiguous ends of the offset contours (gap effects); and (2) irrelevant contours placed at various distances from the vernier offset (interference effects). The gap studies showed that thresholds decreased as the gap grew from 0 to 4-7 min but then increased progressively with separations greater than 7 min. In the interference studies, thresholds were increased 2-6 times when the irrelevant contours were located within 40 min of the offset. Comparing these data with available human measures showed large species differences. Converting the interference distances for both species into cortical distances using published estimates of cortical magnification factor did not resolve the discrepancy. However, a comparison of the cat data with published human data, taken at an eccentricity at which the estimated human cortical magnification factor equals that of the cat, i.e. 7 deg, showed the effects of gap size and interference distan...Continue Reading

References

Feb 18, 1977·Brain Research·D H Hubel, D C Freeman
Jan 15, 1978·The Journal of Comparative Neurology·R J TusaA C Rosenquist
Oct 15, 1979·The Journal of Comparative Neurology·M A Berkley, J M Sprague
Jan 1, 1979·Experimental Brain Research·J Rovamo, V Virsu
Jan 1, 1977·Vision Research·G Westheimer, S P McKee
Jan 1, 1977·Vision Research·M Bloom, M A Berkley
Oct 1, 1975·Vision Research·G Westheimer, G Hauske
Nov 1, 1975·American Journal of Physical Anthropology·M J Hoffman
Jan 1, 1987·Vision Research·A Bradley, B C Skottun
Aug 1, 1987·Journal of the Optical Society of America. A, Optics and Image Science·Y L YapS A Klein
Jan 1, 1986·Vision Research·S Belleville, F Wilkinson
Jan 1, 1985·Vision Research·D M LeviA P Aitsebaomo
Jan 1, 1974·Experimental Brain Research·A Cowey, E T Rolls
Nov 24, 1981·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·M Fahle, T Poggio
Jan 1, 1984·Vision Research·M J Morgan, R J Watt
Jan 1, 1983·Experimental Brain Research·M A Berkley, R Bush
Jan 1, 1982·Vision Research·G Westheimer
Jan 1, 1981·Experimental Brain Research·B M DowR Bauer
Jan 20, 1980·Brain Research·P F Hitchcock, T L Hickey
Feb 1, 1963·Electroencephalography and Clinical Neurophysiology·J M VAN BUREN
Oct 1, 1963·The American Journal of Cardiology·V B HAMMETT

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