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HEMISPHERIC ASYMMETRY IN LIVING MAN Tomokatsu Hori 1 1Department of Neurosurgery, Faculty of Medicine, University of Tokyo pp.639-649
Published Date 1976/7/1
DOI https://doi.org/10.11477/mf.1406203905

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  • Abstract
  • Look Inside

Bilateral temporal planums in living man (39 epileptic patients, major pathology excluded) were calculated by the aid of arteriography using the system of stereotactic technic of Talairach.

The surface of planum temporale on the left was significantly larger than that of the right (P< 0.001). Mean value on the left was 8.55±0.27 cm2 (mean±standard error) and on the right was 7.44 ±0.30 cm2.

The inclination of the right planum to the superior insular line (Vlahovitch) was significantly bigger than that of the left (P<0.001). Mean value of the inclination on the left was 50.0±3.1゚ and on the right was 70.1±2.5゚.

The distance of each landmark from vertical line of the AC-PC line (Talairach) at the level of the anterior margin of the posterior commissure and that from the AC-PC line were measured and analyzed statistically in both hemispheres. The sylvian fissure of the dominant hemisphere was significantly longer than that of the non-dominant hemisphere at its terminal portion.

Especially in the right handed or ambidexter group whose dominant hemisphere were considered to be on the left, end point of sylvian fissure on the left was situated postero-inferiorly than on the right.

Finally it can be said that the end point of sylvian fissure which can be determined by the aid of artery of planum is the best landmark to determine the dominant hemisphere in living man.

In conclusion, three dimensional reading of the angiogram reveals the form of the brain with an enormous amount of precise detailed information, and future research will reveal more and more functional correlations of the precise anatomical organization.


Copyright © 1976, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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