Sobel D F, Gallen C C, Schwartz B J, Waltz T A, Copeland B, Yamada S, Hirschkoff E C, Bloom F E
Division of Neuroradiology, Scripps Clinic and Research Foundation, La Jolla, CA 92037.
AJNR Am J Neuroradiol. 1993 Jul-Aug;14(4):915-25.
To compare MR anatomic and magnetoencephalographic (MEG) functional methods in locating the central sulcus.
Eleven healthy subjects and five patients with focal cerebral lesions were studied. The central sulcus was located anatomically with MR by two independent observers using axial vertex and sagittal (midline and lateral) images. Locations via the MEG functional method were based on detecting the somatosensory-evoked magnetic fields elicited by painless tactile stimuli.
The axial method yielded the most consistent interrater results, with complete agreement in 76% of sections in both control subjects and patients. The intermethod discordance of the sagittal midline and lateral methods was 32% in control subjects and 33% in patients. The concordance of MR and MEG methods ranged from 55% to 84% in control subjects and 65% to 67% in patients.
MR anatomic techniques can usually identify the central sulcus, but in the presence of anatomic distortion, the MEG functional method adds significant information.
比较磁共振（MR）解剖学方法和脑磁图（MEG）功能学方法在定位中央沟方面的差异。
对11名健康受试者和5名局灶性脑损伤患者进行研究。由两名独立观察者利用轴向顶点像和矢状面（中线和外侧）图像通过MR对中央沟进行解剖学定位。通过MEG功能学方法进行定位是基于检测无痛触觉刺激诱发的体感诱发电场。
轴向方法得出的评估者间结果最一致，在对照组受试者和患者中，76%的切片结果完全一致。矢状面中线和外侧方法的方法间不一致率在对照组受试者中为32%，在患者中为33%。MR方法和MEG方法的一致性在对照组受试者中为55%至84%，在患者中为65%至67%。
MR解剖学技术通常能够识别中央沟，但在存在解剖结构变形的情况下，MEG功能学方法能提供重要信息。
