Linden R, Rocha-Miranda C E
Brain Res. 1981 Mar 2;207(2):267-77. doi: 10.1016/0006-8993(81)90364-4.
Two terminal fields were revealed in the pretectal complex of the opossum by the Fink-Heimer method after striate cortical lesions. A rostral field is located within a rostrolateral strip of the compact part of the anterior pretectal nucleus, where a partial topographic arrangement of this projection is present. A caudal field is located within the sub-brachial nucleus of the optic tract, located between the brachium of the superior colliculus and the posterior pretectal nucleus. The corticotopic projection to this field is mirror-symmetric to that found in the superior colliculus and overlaps a bilateral projection from the retina. Based on neural pathway evidence, it is concluded that the nucleus of the optic tract in the opossum can be subdivided in (a) an intrabrachial nucleus receiving a direct projection from the contralateral retina and (b) a sub-brachial nucleus receiving projections from both retinae and from the striate cortex. The pretectal complex, as the superior colliculus, can be anatomically subdivided in a superficial region receiving visual input (the optic pretectum) and a deep region only remotely connected to the visual system. The optic pretectum, however, differs from the superior colliculus in displaying a multiple-map arrangement within its constituent nuclei, instead of a single continuous representation of the visual field.
在负鼠的视皮层损伤后，采用芬克 - 海默法在前顶盖复合体中发现了两个终末区。一个吻侧区位于前顶盖核致密部的吻外侧条带内，该投射在此处存在部分拓扑排列。一个尾侧区位于视束的臂下核内，该核位于上丘臂和后顶盖核之间。向该区域的皮质定位投射与在上丘中发现的投射呈镜像对称，并且与来自视网膜的双侧投射重叠。基于神经通路证据，得出结论：负鼠的视束核可细分为（a）接受对侧视网膜直接投射的臂内核对和（b）接受来自双侧视网膜以及视皮层投射的臂下核对。前顶盖复合体与上丘一样，在解剖学上可细分为接受视觉输入的浅层区域（视前顶盖）和仅与视觉系统有间接联系的深层区域。然而，视前顶盖与上丘的不同之处在于，其组成核内显示出多重图谱排列，而非单一连续的视野表征。
