Park Michael C, Goldman Marc A, Park Min J, Friehs Gerhard M
Department of Clinical Neurosciences Program in Neurosurgery, Brown Medical School, Rhode Island Hospital, Providence, RI 02903, USA.
Stereotact Funct Neurosurg. 2007;85(4):158-61. doi: 10.1159/000099074. Epub 2007 Jan 26.
BACKGROUND/AIMS: The 'precentral knob', a cortical representation of the motor hand function, can be identified and localized consistently using magnetic resonance imaging (MRI) and functional MRI. We present a method of indirectly identifying and localizing the Omega-shaped precentral knob using the anatomical landmarks on computed tomography (CT).
CT and MRI obtained within 24 h from 10 patients undergoing a headache workup and found to be negative for any anatomical abnormalities were studied. First, the precentral knob was identified in the CT images. Then, the 'coronal suture line' and 'midline' were identified and used to measure the distance to the precentral knob on both hemispheres. MRI was used to confirm the location of the precentral knob in the CT images based on anatomical landmarks (i.e. sulcal configurations).
The precentral knob is located 45.1 +/- 5.2 mm posterior with respect to the coronal suture line and 33.9 +/- 3.4 mm lateral to the midline on the right hemisphere, and 44.6 +/- 5.7 mm posterior and 33.2 +/- 2.5 mm lateral on the left hemisphere.
We present a method of consistently identifying and localizing the Omega-shaped precentral knob, a cortical representation of the motor hand function, using CT.
背景/目的：“中央前叶结节”是运动手功能的皮质代表区，可通过磁共振成像（MRI）和功能MRI一致地识别和定位。我们提出一种利用计算机断层扫描（CT）上的解剖标志间接识别和定位Ω形中央前叶结节的方法。
研究了10例因头痛接受检查且未发现任何解剖异常的患者在24小时内获得的CT和MRI图像。首先，在CT图像中识别中央前叶结节。然后，识别“冠状缝”和“中线”，并用于测量两侧半球到中央前叶结节的距离。基于解剖标志（即脑沟形态），使用MRI确认CT图像中中央前叶结节的位置。
在右半球，中央前叶结节位于冠状缝后方45.1±5.2mm、中线外侧33.9±3.4mm处；在左半球，位于冠状缝后方44.6±5.7mm、中线外侧33.2±2.5mm处。
我们提出了一种利用CT一致地识别和定位Ω形中央前叶结节（运动手功能的皮质代表区）的方法。
