Tusa R J, Ungerleider L G
Ann Neurol. 1985 Nov;18(5):583-91. doi: 10.1002/ana.410180512.
The inferior longitudinal fasciculus is commonly considered to be a long association fiber bundle interconnecting the occipital and temporal lobes. Based on blunt dissections of human and monkey brains, we have found that the only long fiber bundle common to both the occipital and temporal lobes is the geniculostriate pathway (i.e., optic radiations), located within the external sagittal stratum. In addition, our autoradiographic experiments indicate that the pathway from the occipital to the temporal cortex in monkeys consists of a series of U fibers that course beneath the cortical mantle to connect adjacent regions in striate, prestriate, and inferior temporal cortex. We suggest that the occipital and temporal lobes in human beings are similarly connected by a series of U fibers and that the term inferior longitudinal fasciculus be replaced with the term occipitotemporal projection system. Different clinical syndromes attributed to lesions of the inferior longitudinal fasciculus, including visual agnosia, prosopagnosia, and impaired visual recent memory, are probably due to interruption of fibers at different points along this projection system.
下纵束通常被认为是连接枕叶和颞叶的长联合纤维束。基于对人类和猴脑的钝性解剖，我们发现枕叶和颞叶共有的唯一长纤维束是位于外矢状层的膝状体纹状体通路（即视辐射）。此外，我们的放射自显影实验表明，猴脑中从枕叶到颞叶皮质的通路由一系列U形纤维组成，这些纤维在皮质被膜下方走行，连接纹状、纹前和颞下皮质的相邻区域。我们认为人类的枕叶和颞叶同样由一系列U形纤维连接，并且“下纵束”一词应被“枕颞投射系统”所取代。归因于下纵束损伤的不同临床综合征，包括视觉失认、面孔失认和近期视觉记忆受损，可能是由于该投射系统不同部位的纤维中断所致。
