What is it about?
The topography of visual evoked potentials (VEP) is dependent on occipital lobe morphology. Using magnetic resonance imaging we examine the sulcal pattern (the calcarine and parieto-occipital sulci), and assess the size of the cuneus and the asymmetry of the occipital lobes, computed separately for its ventral and dorsal segments. No differences were found for either the cuneus or the sulci pattern. In contrast, hemispheric asymmetry values appeared to be substantial. The predominance of the left occipital area was seen distinctly in the ventro-caudal portion of the occipital lobe. It was frequently reversed in the dorsal aspect of the lobe, notably in more rostral cuts. Such complexities may lead to ambiguities in interpreting VEP asymmetries.
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Why is it important?
See also: Myslobodsky, M. S., van Praag, H., Bar-Ziv, J., & Glicksohn, J. (1990). The contribution of calvarial and brain parenchymal variables to VEP asymmetries. In C. H. M. Brunia, A. W. K. Gaillard, & A. Kok (Eds.), Psychophysiological brain research (Vol. 1, pp. 83-86). Tilburg: Tilburg University Press.
Perspectives
One contribution that I made to this paper was to look at brain morphology in terms of an ordering within a two-dimensional space, using Smallest Space Analysis. This was an initial analysis that was subsequently developed in a paper we published in Neuropsychologia, with me as first author.
Professor Joseph Glicksohn
Bar-Ilan University
Read the Original
This page is a summary of: Occipital lobe morphology in normal individuals assessed by magnetic resonance imaging (MRI), Vision Research, January 1991, Elsevier,
DOI: 10.1016/0042-6989(91)90019-2.
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