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KMID : 1001920070410030171
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Journal of Korean Neurosurgical Society
2007 Volume.41 No. 3 p.171 ~ p.176
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The Morphometric Study for the Rolandic Fissure
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Choi Jin-Gu
Bae Hack-Gun
Sim Jae-Jun
Park Heung-Ki
Sim Ki-Bum
Choi Soon-Kwan
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Abstract
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Objective: The purpose of this study was to characterize the Rolandic fissure(Rf) and was to identify the Rf using the surface bony landmarks which can be usually exposed on craniotomy.
Methods: After morphological evaluation of the Rfs using 21 Korean adult formalin fixed cadavers, craniometric measurement was carried out from the surface bony landmarks of nasion, glabella, bregma, and lambda.
Results: The Rfs of both hemispheres did not show the mirror image. The Rfs ran forward and downward toward the sylvian fissure keeping the mean angle of 67° from mid-sagittal line as elongated S-shape in left and the elongated reverse S-shape in right hemisphere. Connections between the Rf and the longitudinal fissure and between the Rf and the sylvian fissure were found in 3 (7.1%) and 2 (4.8%) of 42 hemispheres, respectively. Most Rfs extended superiorly to 2-3mm lateral to the most superomedial surface of hemispheres and extended inferiorly to 3-5mm superior to the sylvian fissures. The mean distances from the nasion, glabella, bregma, and lambda to the most superomedial aspect of the Rf were 18.8±0.9cm, 16.6±0.8cm, 5.2±0.6cm, and 6.9±1.0cm, respectively. The mean distance measured between the Rf and the nasion using traditional method was 18.4±0.6cm.
Conclusion: The distance between the Rf and the nasion roughly correspond within the range of mean 4 mm compared with that measured by the traditional measurement. These data may be more helpful to delineate the Rf after the placement of drapes for craniotomy.
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KEYWORD
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Key words : Rolandic fissure, Craniometric measurement, Nasion, Bregma, Lambda
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