What is it about?
The parieto-occipital (PO) index of the VEP alpha-afterdischarge (AD) was assessed bilaterally in normal subjects in three successive sessions separated by one-three weeks with two within-session retests. Correlations between PO values and asymmetries of occipital and parietal width, mastoid area, basal angle, cephalic, and plagiocephaly indices were established in simple correlation and stepwise multiple regression analysis. Occipital width, notably in the right hemisphere correlated reliably with the PO index in relaxed wakefulness and the vigilance task. The population having normal and reversed occipital brain width is predicted to have different parieto-occipital AD distribution. Some errors of lateral EEG measurements introduced by slant cranial deformity are discussed in order to call attention to the fact that anatomy-related lateral EEG changes may masquerade as cognition-related asymmetries.
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Why is it important?
Consider also the relationship between plagiocephaly and sleep position: Glicksohn, J., Kapelusshnik, J., Bar-Ziv, J., & Myslobodsky, M. S. (1993). A new view on sleep position via head slant. Functional Neurology, 8, 347-350.
Perspectives
My first paper (as junior author) stemming from my postdoctoral research with Prof. Myslobodsky. The question whether EEG alpha asymmetry in occipital leads might be due to structural differences in skull thickness was an intriguing entry point into the use of brain imaging to assist the interpretation of the EEG.
Professor Joseph Glicksohn
Bar-Ilan University
Read the Original
This page is a summary of: Bilateral alpha distribution and anatomic brain asymmetries, Brain Topography, June 1989, Springer Science + Business Media,
DOI: 10.1007/bf01129600.
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