The superior frontal sulcus in the human brain – Morphology and probability maps

The superior frontal sulcus (SFS) is a major sulcus on the dorsolateral frontal cortex that defines the lateral limit of the superior frontal gyrus. Caudally, it originates near the superior precentral sulcus (SPRS) and rostrally, it terminates near the frontal pole. The advent of structural neuroimaging has revealed that this primary sulcus shows significant variability below the surface which is not captured by the classic sulcal maps. The present investigation examined the morphological variability of the SFS in 50 individual magnetic resonance imaging (MRI) scans of the human brain that were registered to the Montreal Neurological Institute (MNI) standard stereotaxic space. Two primary morphological patterns were identified: i) the SFS was classified as either a continuous sulcus or ii) the SFS was a complex of sulcal segments. Further, the SFS showed a high probability of merging with neighboring sulci on the superior and middle frontal gyri, and these patterns were documented. In ..., , , Volumetric and Surface Spatial Probability Maps for the Superior Frontal Sulcus of the Human Brain
K. Drudik, M. Petrides

Spatial probability maps can be used by researchers to superimpose individual subject functional activity peaks on the probability maps to faciliate the identification of sulci found within the dorsolateral frontal cortex.

The volumetric probability maps should be overlaid onto the recent Montreal Neurological Institute average stereotaxic template (MNI152 2009c asymmetric template).
The software pacakage, DISPLAY (MacDonald 1996; Vincent et al. 2016), can be used for visualization.

The surface probability maps should visualized using the open-access pipeline FreeSurfer (Dale et al. 1999; Fischl et al. 1999a, b).
The surface probability mapps should be overlaid onto the pial surface of FreeSurfer's average surface template, fsaverage.

Files included:

* surface\_type1\_lh.mgz: Surface probability map for Type I superior frontal sulcus in the left hemisphere
* sur...

额上沟（superior frontal sulcus, SFS）是人类背外侧额皮质上的主要脑沟，界定了额上回的外侧边界。其尾侧起自中央前沟上部（superior precentral sulcus, SPRS）附近，吻侧终止于额极区域。结构神经影像学技术的发展揭示，这一核心脑沟存在皮质表面下的显著形态变异，而经典脑沟图谱无法捕捉这类变异。本研究针对50例配准至蒙特利尔神经学研究所（Montreal Neurological Institute, MNI）标准立体定位空间的人类大脑磁共振成像（magnetic resonance imaging, MRI）扫描数据，分析了SFS的形态学变异特征。研究识别出两种主要形态模式：其一，SFS为连续型脑沟；其二，SFS由多段脑沟组合形成复合体。此外，SFS与额上回、额中回邻近脑沟发生融合的概率较高，相关形态模式均已被记录。

本研究成果出自《人类大脑额上沟的体积与表面空间概率图谱》，作者为K. Drudik与M. Petrides。

空间概率图谱可供研究人员将个体受试者的功能活动峰值叠加至图谱之上，以辅助识别背外侧额皮质内的脑沟结构。
体积概率图谱需叠加至最新版蒙特利尔神经学研究所标准立体定位模板（MNI152 2009c非对称模板）。可使用DISPLAY软件包（MacDonald 1996; Vincent et al. 2016）完成可视化操作。
表面概率图谱需通过开源分析流程FreeSurfer（Dale et al. 1999; Fischl et al. 1999a, b）进行可视化，并叠加至FreeSurfer的平均表面模板fsaverage的软脑膜表面。
本数据集包含以下文件：
* surface_type1_lh.mgz：左侧半球I型额上沟的表面概率图谱
* sur...（原文内容截断）