How reliable are occipital asymmetry measurements?

In vivo occipital asymmetry (OA) measurements have been used to infer functional asymmetries such as language dominance. We investigated the degree of correlation between OA measurements derived by the same rater from different scans of the same subject. We used magnetic resonance (MR) and computeri...

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Bibliographic Details
Published in:Neuropsychologia 1994-12, Vol.32 (12), p.1503-1513
Main Authors: Chu, Ching-Chiang, Tranel, Daniel, Damasio, Hanna
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Dominance, Cerebral - physiology
Female
hemispheric asymmetry
Humans
Magnetic Resonance Imaging - statistics & numerical data
Male
Middle Aged
neuroanatomy
neuroimaging
Occipital Lobe - anatomy & histology
Reference Values
reliability
Reproducibility of Results
Tomography, X-Ray Computed - statistics & numerical data
validity
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Description
Summary:In vivo occipital asymmetry (OA) measurements have been used to infer functional asymmetries such as language dominance. We investigated the degree of correlation between OA measurements derived by the same rater from different scans of the same subject. We used magnetic resonance (MR) and computerized axial tomography (CT) to study correlations between MR:MR, CT:CT and CT:MR. The highest intrasubject correlation was for MR:MR ( r =0.79). The CT:CT value was similar ( r = 0.78) and the CT:MR correlation was slightly lower ( r = 0.72). The findings indicate that the reliability of occipital asymmetry measurements is modest at best, setting a low ceiling on the valid use of this variable to infer other indexes.
ISSN:0028-3932
1873-3514
DOI:10.1016/0028-3932(94)90122-8