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Journal of Korean Neurosurgical Society 2007;41(3): 171-176.
doi: https://doi.org/10.3340/jkns.2007.41.3.171
The Morphometric Study for the Rolandic Fissure.
Jin Gu Choi, Hack Gun Bae, Jae Jun Sim, Heung Ki Park, Ki Bum Sim, Soon Kwan Choi
1Department of Neurosurgery, Soonchunhyang University Cheonan Hospital, Cheonan, Korea. hgbaeb@schch.co.kr
2Department of Neurosurgery, Cheju National University College of Medicine, Jeju, Korea.
ABSTRACT
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 67degrees 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.
Key Words: Rolandic fissure; Craniometric measurement; Nasion; Bregma; Lambda
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