Laboratoire d'Anatomie et d'Organogenèse, Université de Picardie Jules Verne, Amiens, France.
J Neurosurg. 2010 May;112(5):1033-8. doi: 10.3171/2009.6.JNS08132.
The authors used a fiber dissection technique to describe the temporal stem and explain the tendency of malignant tumors to spread within both the frontal and temporal lobes. The authors focused on the morphological characteristics and course of various fasciculi of the temporal stem, including the uncinate fascicle, occipitofrontal fascicle, anterior commissure, loop of the optic radiations (Meyer loop), and the ansa peduncularis.
Eight previously frozen, formalin-fixed human brains were dissected under an operating microscope using the fiber dissection technique described by Klingler. Lateral, inferior, and medial approaches were made. Cross-sectional 3D MR images obtained in 10 patients without brain lesions demonstrated that fibers of the temporal stem, which were intermingled together in various ways, curved laterally within the basal forebrain. Various pathological entities affecting the temporal stem are described and discussed.
The uncinate fascicle has 3 portions: a ventral extension, an intermediary segment called the isthmus, and a dorsal segment. The inferior occipitofrontal fasciculus is a layer of more superficial white matter that appeared to be superior to the uncinate fasciculus. A short ventral portion of the radiations of the corpus callosum was sometimes noted to run ventrally to enter the temporal stem and to reach both temporal lobes.
To the authors' knowledge, a detailed anatomy of the temporal stem has not been previously described in the literature. The unique anatomy of the temporal stem provides a route for tumor spread between the frontal and temporal lobes.
作者采用纤维解剖技术描述了颞干，并解释了恶性肿瘤在额叶和颞叶内扩散的趋势。作者专注于颞干各束的形态特征和走行，包括钩束、枕额束、前连合、视辐射环（Meyer 环）和丘系脚间束。
采用 Klingler 描述的纤维解剖技术，在手术显微镜下对 8 例先前冷冻、福尔马林固定的人脑进行解剖。采用外侧、下方和内侧入路。对 10 例无脑部病变的患者进行了横断面 3D-MR 成像，显示交织在一起的颞干纤维在基底前脑内呈侧向弯曲。描述并讨论了影响颞干的各种病理实体。
钩束有 3 个部分：腹侧延伸部、称为峡部的中间段和背侧段。下枕额束是一层较浅的白质，似乎位于钩束之上。胼胝体辐射的短腹侧部分有时被注意到向腹侧走行进入颞干并到达两个颞叶。
据作者所知，颞干的详细解剖以前尚未在文献中描述过。颞干的独特解剖结构为肿瘤在额叶和颞叶之间扩散提供了一条途径。
