Komaitis Spyridon, Skandalakis Georgios P, Kalyvas Aristotelis V, Drosos Evangelos, Lani Evgenia, Emelifeonwu John, Liakos Faidon, Piagkou Maria, Kalamatianos Theodosis, Stranjalis George, Koutsarnakis Christos
1Athens Microneurosurgery Laboratory, Evangelismos Hospital.
Departments of2Neurosurgery and.
J Neurosurg. 2019 Mar 1;132(4):1265-1278. doi: 10.3171/2018.11.JNS182908. Print 2020 Apr 1.
The aim of this study was to investigate the anatomical consistency, morphology, axonal connectivity, and correlative topography of the dorsal component of the superior longitudinal fasciculus (SLF-I) since the current literature is limited and ambiguous.
Fifteen normal, adult, formalin-fixed cerebral hemispheres were studied through a medial to lateral fiber microdissection technique. In 5 specimens, the authors performed stepwise focused dissections of the lateral cerebral aspect to delineate the correlative anatomy between the SLF-I and the other two SLF subcomponents, namely the SLF-II and SLF-III.
The SLF-I was readily identified as a distinct fiber tract running within the cingulate or paracingulate gyrus and connecting the anterior cingulate cortex, the medial aspect of the superior frontal gyrus, the pre-supplementary motor area (pre-SMA), the SMA proper, the paracentral lobule, and the precuneus. With regard to the morphology of the SLF-I, two discrete segments were consistently recorded: an anterior and a posterior segment. A clear cleavage plane could be developed between the SLF-I and the cingulum, thus proving their structural integrity. Interestingly, no anatomical connection was revealed between the SLF-I and the SLF-II/SLF-III complex.
Study results provide novel and robust anatomical evidence on the topography, morphology, and subcortical architecture of the SLF-I. This fiber tract was consistently recorded as a distinct anatomical entity of the medial cerebral aspect, participating in the axonal connectivity of high-order paralimbic areas.
由于目前的文献有限且存在歧义，本研究旨在探讨上纵束背侧部分（SLF-I）的解剖学一致性、形态、轴突连接及相关局部解剖。
通过从内侧到外侧的纤维显微解剖技术，对15个正常成人福尔马林固定的大脑半球进行研究。在5个标本中，作者对大脑外侧进行逐步聚焦解剖，以描绘SLF-I与其他两个SLF子成分，即SLF-II和SLF-III之间的相关解剖结构。
SLF-I很容易被识别为一条独特的纤维束，走行于扣带回或旁扣带回内，连接前扣带回皮质、额上回内侧、补充运动前区（pre-SMA）、真正的补充运动区（SMA）、中央旁小叶和楔前叶。关于SLF-I的形态，始终记录到两个离散段：前段和后段。在SLF-I和扣带之间可以形成一个清晰的分离平面，从而证明它们的结构完整性。有趣的是，未发现SLF-I与SLF-II/SLF-III复合体之间存在解剖学连接。
研究结果为SLF-I的局部解剖、形态和皮质下结构提供了新的有力解剖学证据。这条纤维束始终被记录为大脑内侧的一个独特解剖实体，参与高阶边缘旁区域的轴突连接。
