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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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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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container_title	Neuropsychologia
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description	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.
doi_str_mv	10.1016/0028-3932(94)90122-8
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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
title	How reliable are occipital asymmetry measurements?
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